Remeron SolTab (Mirtazapine): Uses, Dosage, Side Effects, Interactions, Warning

PROFESSIONAL CONSUMER SIDE EFFECTS

Drug Description

What are Remeron SolTab and how is it used?

Remeron SolTab is a prescription medicine used to treat symptoms of depression. Remeron SolTab may be used alone or with other medications.

Remeron SolTab belongs to a class of drugs called Antidepressants, Alpha-2 Antagonists; Antidepressants, Other.

It is not known if Remeron SolTab is safe and effective in children.

What are the possible side effects of Remeron SolTab?

Remeron SolTab may cause serious side effects including:

feeling restless,
racing thoughts,
decreased need for sleep,
unusual risk-taking behavior,
feelings of extreme happiness or sadness,
being more talkative than usual,
blurred vision,
tunnel vision,
eye pain or swelling,
seeing halos around lights,
lightheadedness,
fever,
chills,
sore throat,
mouth sores,
changes in weight or appetite,
severe rash, blisters, or swelling on the palms of your hands or the soles of your feet,
convulsions (seizure),
headache,
confusion,
slurred speech,
severe weakness,
vomiting,
loss of coordination, and
feeling unsteady

Get medical help right away, if you have any of the symptoms listed above.

The most common side effects of Remeron SolTab include:

drowsiness,
dizziness,
strange dreams,
dry mouth,
constipation,
increased appetite, and
weight gain

Tell your doctor if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of Remeron SolTab. For more information, ask your doctor or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Suicidality and Antidepressant Drugs

Antidepressants increased the risk compared to placebo of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults in short-term studies of major depressive disorder (MDD) and other psychiatric disorders. Anyone considering the use of REMERONSolTab® (mirtazapine) Orally Disintegrating Tablets or any other antidepressant in a child, adolescent, or young adult must balance this risk with the clinical need. Short-term studies did not show an increase in the risk of suicidality with antidepressants compared to placebo in adults beyond age 24; there was a reduction in risk with antidepressants compared to placebo in adults aged 65 and older. Depression and certain other psychiatric disorders are themselves associated with increases in the risk of suicide. Patients of all ages who are started on antidepressant therapy should be monitored appropriately and observed closely for clinical worsening, suicidality, or unusual changes in behavior. Families and caregivers should be advised of the need for close observation and communication with the prescriber. REMERONSolTab® (mirtazapine) is not approved for use in pediatric patients. (See WARNINGS: Clinical Worsening and Suicide Risk, PRECAUTIONS: Information for Patients, and PRECAUTIONS: Pediatric Use)

DESCRIPTION

REMERONSolTab® (mirtazapine) Orally Disintegrating Tablets are an orally administered drug. Mirtazapine has a tetracyclic chemical structure and belongs to the piperazino-azepine group of compounds. It is designated 1,2,3,4,10,14b-hexahydro-2-methylpyrazino [2,1-a] pyrido [2,3-c] benzazepine and has the empirical formula of C₁₇H₁₉N₃. Its molecular weight is 265.36. The structural formula is the following and it is the racemic mixture:

REMERONSolTab® (mirtazapine) structural formula illustration

Mirtazapine is a white to creamy white crystalline powder which is slightly soluble in water.

REMERONSolTab® (mirtazapine) is available for oral administration as an orally disintegrating tablet containing 15, 30, or 45 mg of mirtazapine. It disintegrates in the mouth within seconds after placement on the tongue allowing its contents to be subsequently swallowed with or without water. REMERONSolTab® (mirtazapine) also contains the following inactive ingredients: aspartame, citric acid, crospovidone, hypromellose, magnesium stearate, mannitol, microcrystalline cellulose, natural and artificial orange flavor, polymethacrylate, povidone, sodium bicarbonate, starch, and sucrose.

Indications & Dosage

INDICATIONS

REMERON/REMERONSolTab are indicated for the treatment of major depressive disorder (MDD) in adults [see Clinical Studies].

DOSAGE AND ADMINISTRATION

Recommended Dosage

The recommended starting dose of REMERON/REMERONSolTab is 15 mg once daily, administered orally, preferably in the evening prior to sleep. If patients do not have an adequate response to the initial 15 mg dose, increase the dose up to a maximum of 45 mg per day. Dose changes should not be made in intervals of less than 1 to 2 weeks to allow sufficient time for evaluation of response to a given dose [see CLINICAL PHARMACOLOGY].

Administration Of REMERONSolTab

The tablet should remain in the blister pack until the patient is ready to take it.
The patient or caregiver should use dry hands to open the blister.
As soon as the blister is opened, the tablet should be removed and placed on the patient’s tongue.
Use REMERONSolTab immediately after removal from its blister; once removed, it cannot be stored.
The whole tablet should be placed on the tongue and allowed to disintegrate without chewing or crushing. Do not attempt to split the tablet.
The tablet will disintegrate in saliva so that it can be swallowed.

Screen For Bipolar Disorder Prior To Starting REMERON/REMERONSolTab

Prior to initiating treatment with REMERON/REMERONSolTab or another antidepressant, screen patients for a personal or family history of bipolar disorder, mania, or hypomania [see WARNINGS AND PRECAUTIONS].

Switching Patients To Or From A Monoamine Oxidase Inhibitor Antidepressant

At least 14 days must elapse between discontinuation of a monoamine oxidase inhibitor (MAOI) antidepressant and initiation of REMERON/REMERONSolTab. In addition, at least 14 days must elapse after stopping REMERON/REMERONSolTab before starting an MAOI antidepressant [see CONTRAINDICATIONS and WARNINGS AND PRECAUTIONS].

Dosage Modifications Due To Drug Interactions

Strong CYP3A Inducers

An increase in dosage of REMERON/REMERONSolTab may be needed with concomitant strong CYP3A inducer (e.g., carbamazepine, phenytoin, rifampin) use. Conversely, a decrease in dosage of REMERON/REMERONSolTab may be needed if the CYP3A inducer is discontinued [see DRUG INTERACTIONS].

Strong CYP3A

Inhibitors A decrease in dosage of REMERON/REMERONSolTab may be needed with concomitant use of strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin). Conversely, an increase in dosage of REMERON/REMERONSolTab may be needed if the CYP3A4 inhibitor is discontinued [see DRUG INTERACTIONS].

Cimetidine

A decrease in dosage of REMERON/REMERONSolTab may be needed with concomitant use of cimetidine. Conversely, an increase in dosage of REMERON/REMERONSolTab may be needed if cimetidine is discontinued [see DRUG INTERACTIONS].

Discontinuation Of REMERON/REMERONSolTab Treatment

Adverse reactions may occur upon discontinuation or dose reduction of REMERON/REMERONSolTab [see WARNINGS AND PRECAUTIONS]. Gradually reduce the dosage of REMERON/REMERONSolTab rather than stopping abruptly whenever possible.

HOW SUPPLIED

Dosage Forms And Strengths

REMERON Is Supplied As

15 mg tablets: Oval, scored, yellow, with "Organon" debossed on one side and "T₃Z" on the other side, on both sides of the score line
15 mg tablets: Oval, scored, yellow, with "MSD" debossed on one side and "T₃Z" on the other side, on both sides of the score line
30 mg tablets: Oval, scored, red-brown, with "Organon" debossed on one side and "T₅Z" on the other side, on both sides of the score line
30 mg tablets: Oval, scored, red-brown, with "MSD" debossed on one side and "T₅Z" on the other side, on both sides of the score line

REMERONSolTab Is Supplied As

15 mg orally disintegrating tablets: Round, white, with "T₁Z" debossed on one side
30 mg orally disintegrating tablets: Round, white, with "T₂Z" debossed on one side
45 mg orally disintegrating tablets: Round, white, with "T₄Z" debossed on one side

Storage And Handling

REMERON tablets are supplied as:

Tablet Strength	Tablet Color/ Shape	Tablet Markings	Package Configuration	NDC Code
15 mg	Yellow, oval tablet	Scored with “Organon" debossed on one side and "T₃Z" on other side, on both sides of score line	Bottle / 30 count	0052-0105-30
15 mg	Yellow, oval tablet	Scored with “MSD" debossed on one side and "T₃Z" on other side, on both sides of score line	Bottle / 30 count	0052-4364-01
30 mg	Red-brown, oval tablet	Scored with "Organon" debossed on one side and "T₅Z" on other side, on both sides of score line	Bottle / 30 count	0052-0107-30
30 mg	Red-brown, oval tablet	Scored with "MSD" debossed on one side and "T₅Z" on other side, on both sides of score line	Bottle / 30 count	0052-4365-01

Storage

Store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature]. Protect from light and moisture.

REMERONSolTab orally disintegrating tablets are supplied as:

Tablet Strength	Tablet Color/Shape	Tablet Markings	Package Configuration	NDC Code
15 mg	White, round tablet	"T₁Z" debossed on one side.	Box of 5 x 6-unit dose blister packs/ 30 count	0052-0106-30
30 mg	White, round tablet	"T₂Z" debossed on one side.	Box of 5 x 6-unit dose blister packs/30 count	0052-0108-30
45 mg	White, round tablet	"T₄Z" debossed on one side	Box of 5 x 6-unit dose blister packs/30 count	0052-0110-30

Storage

Store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature]. Protect from light and moisture. Use immediately upon opening individual tablet blister.

Distributed by: Merck Sharp & Dohme Corp., a subsidiary of MERCK & CO., INC., Whiteshouse Station, NJ 08889, USA. Revised: Mar 2020

Side Effects

SIDE EFFECTS

The following adverse reactions are described in more detail in other sections of the prescribing information:

Hypersensitivity [see CONTRAINDICATIONS]
Suicidal Thoughts and Behaviors [see WARNINGS AND PRECAUTIONS]
Agranulocytosis [see WARNINGS AND PRECAUTIONS]
Serotonin Syndrome [see CONTRAINDICATIONS, WARNINGS AND PRECAUTIONS, DRUG INTERACTIONS]
Angle-Closure Glaucoma [see WARNINGS AND PRECAUTIONS]
QT Prolongation and Torsades de Pointes [see WARNINGS AND PRECAUTIONS]
Increased Appetite and Weight Gain [see WARNINGS AND PRECAUTIONS]
Somnolence [see WARNINGS AND PRECAUTIONS]
Activation of Mania or Hypomania [see WARNINGS AND PRECAUTIONS]
Seizures [see WARNINGS AND PRECAUTIONS]
Elevated Cholesterol and Triglycerides [see WARNINGS AND PRECAUTIONS]
Hyponatremia [see WARNINGS AND PRECAUTIONS]
Transaminase Elevations [see WARNINGS AND PRECAUTIONS]
Discontinuation Syndrome [see WARNINGS AND PRECAUTIONS]
Use in Patients with Concomitant Illness [see WARNINGS AND PRECAUTIONS]

Clinical Trial Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

The data described below are from clinical trials in which REMERON/REMERONSolTab was administered to 2796 patients in phase 2 and 3 clinical studies. The trials consisted of double-blind controlled and open-label studies, inpatient and outpatient studies, fixed dose, and titration studies.

Adverse Reactions Leading To Discontinuation Of Treatment

Approximately 16% of the 453 patients who received REMERON in U.S. 6-week placebo-controlled clinical trials discontinued treatment due to an adverse reaction, compared to 7% of the 361 placebo-treated patients in those studies. The most common reactions leading to discontinuation (≥1% and at a rate at least twice that of placebo) are included in Table 2.

Table 2: Adverse Reactions (≥1% and at least twice placebo) Leading to Discontinuationof REMERON in 6-Week Clinical Trials in Patients with MDD

	REMERON (n=453)	Placebo (n=361)
Somnolence	10.4%	2.2%
Nausea	1.5%	0%

Common Adverse Reactions

The most common adverse reactions (≥5% and twice placebo) associated with the use of REMERON are listed in Table 3.

Table 3: Adverse Reactions (≥5% and twice placebo) in 6-Week U.S. Clinical Trials of REMERON in Patients with MDD

	REMERON (n=453)	Placebo (n=361)
Somnolence	54%	18%
Increased Appetite	17%	2%
Weight Gain	12%	2%
Dizziness	7%	3%

Table 4 enumerates adverse reactions that occurred in ≥1% of REMERON-treated patients, and were more frequent than the placebo-treated patients, who participated in 6-week, U.S. placebo-controlled trials in which patients were dosed in a range of 5 to 60 mg/day. This table shows the percentage of patients in each group who had at least 1 episode of an adverse reaction at some time during their treatment.

Table 4: Adverse Reactions (≥1% and greater than placebo) in 6-Week U.S. Clinical Studies of Remeron in Patients with MDD

	REMERON (n=453)	Placebo (n=361)
Body as a Whole
Asthenia	8%	5%
Flu Syndrome	5%	3%
Back Pain	2%	1%
Digestive System
Dry Mouth	25%	15%
Increased Appetite	17%	2%
Constipation	13%	7%
Metabolic and Nutritional Disorders
Weight Gain	12%	2%
Peripheral Edema	2%	1%
Edema	1%	0%
Musculoskeletal System
Myalgia	2%	1%
Nervous System
Somnolence	54%	18%
Dizziness	7%	3%
Abnormal Dreams	4%	1%
Thinking Abnormal	3%	1%
Tremor	2%	1%
Confusion	2%	0%
Respiratory System
Dyspnea	1%	0%
Urogenital System
Urinary Frequency	2%	1%

ECG Changes

The electrocardiograms for 338 patients who received REMERON and 261 patients who received placebo in 6-week, placebo-controlled trials were analyzed. REMERON was associated with a mean increase in heart rate of 3.4 bpm, compared to 0.8 bpm for placebo. The clinical significance of these changes is unknown.

Other Adverse Reactions Observed During The Premarketing Evaluation Of REMERON

The following list does not include reactions: 1) already listed in previous tables or elsewhere in labeling, 2) for which a drug cause was remote, 3) which were so general or excessively specific so as to be uninformative, 4) which were not considered to have significant clinical implications, or 5) which occurred at a rate equal to or less than placebo.

Adverse reactions are categorized by body system according to the following definitions: frequent adverse reactions are those occurring in at least 1/100 patients; infrequent adverse reactions are those occurring in 1/100 to 1/1000 patients; rare adverse reactions are those occurring in fewer than 1/1000 patients.

Body as a Whole: frequent: malaise, abdominal pain, abdominal syndrome acute; infrequent: chills, fever, face edema, ulcer, photosensitivity reaction, neck rigidity, neck pain, abdomen enlarged; rare: cellulitis, chest pain substernal.

Cardiovascular System: frequent: hypertension, vasodilatation; infrequent: angina pectoris, myocardial infarction, bradycardia, ventricular extrasystoles, syncope, migraine, hypotension; rare: atrial arrhythmia, bigeminy, vascular headache, pulmonary embolus, cerebral ischemia, cardiomegaly, phlebitis, left heart failure.

Digestive System: frequent: vomiting, anorexia; infrequent: eructation, glossitis, cholecystitis, nausea and vomiting, gum hemorrhage, stomatitis, colitis, liver function tests abnormal; rare: tongue discoloration,ulcerative stomatitis, salivary gland enlargement, increased salivation, intestinal obstruction, pancreatitis, aphthous stomatitis, cirrhosis of liver, gastritis, gastroenteritis, oral moniliasis, tongue edema.

Endocrine System: rare: goiter, hypothyroidism.

Hemic and Lymphatic System: rare: lymphadenopathy, leukopenia, petechia, anemia, thrombocytopenia, lymphocytosis, pancytopenia.

Metabolic and Nutritional Disorders: frequent: thirst; infrequent: dehydration, weight loss; rare: gout, SGOT increased, healing abnormal, acid phosphatase increased, SGPT increased, diabetes mellitus, hyponatremia.

Musculoskeletal System: frequent: myasthenia, arthralgia; infrequent: arthritis, tenosynovitis; rare: pathologic fracture, osteoporosis fracture, bone pain, myositis, tendon rupture, arthrosis, bursitis.

Nervous System: frequent: hypesthesia, apathy, depression, hypokinesia, vertigo, twitching, agitation, anxiety, amnesia, hyperkinesia, paresthesia; infrequent: ataxia, delirium, delusions, depersonalization, dyskinesia, extrapyramidal syndrome, libido increased, coordination abnormal, dysarthria, hallucinations, manic reaction, neurosis, dystonia, hostility, reflexes increased, emotional lability, euphoria, paranoid reaction; rare: aphasia, nystagmus, akathisia (psychomotor restlessness), stupor, dementia, diplopia, drug dependence, paralysis, grand mal convulsion, hypotonia, myoclonus, psychotic depression, withdrawal syndrome, serotonin syndrome.

Respiratory System: frequent: cough increased, sinusitis; infrequent: epistaxis, bronchitis, asthma, pneumonia; rare: asphyxia, laryngitis, pneumothorax, hiccup.

Skin and Appendages: frequent: pruritus, rash; infrequent: acne, exfoliative dermatitis, dry skin, herpes simplex, alopecia; rare: urticaria, herpes zoster, skin hypertrophy, seborrhea, skin ulcer.

Special Senses: infrequent: eye pain, abnormality of accommodation, conjunctivitis, deafness, keratoconjunctivitis, lacrimation disorder, angle-closure glaucoma, hyperacusis, ear pain; rare: blepharitis, partial transitory deafness, otitis media, taste loss, parosmia.

Urogenital System: frequent: urinary tract infection; infrequent: kidney calculus, cystitis, dysuria, urinary incontinence, urinary retention, vaginitis, hematuria, breast pain, amenorrhea, dysmenorrhea, leukorrhea, impotence; rare: polyuria, urethritis, metrorrhagia, menorrhagia, abnormal ejaculation, breast engorgement, breast enlargement, urinary urgency.

Postmarketing Experience

The following adverse reactions have been identified during post-approval use of REMERON. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Cardiac disorders: ventricular arrhythmia (Torsades de Pointes)

Endocrine disorders: hyperprolactinemia (and related symptoms, e.g., galactorrhea and gynecomastia)

Musculoskeletal and connective tissue disorders: increased creatine kinase blood levels and rhabdomyolysis

Psychiatric disorders: somnambulism (ambulation and other complex behaviors out of bed)

Skin and subcutaneous tissue disorders: severe skin reactions, including Stevens-Johnson syndrome, bullous dermatitis, erythema multiforme and toxic epidermal necrolysis

Drug Interactions

DRUG INTERACTIONS

Table 5 includes clinically important drug interactions with REMERON/REMERONSolTab [see CLINICAL PHARMACOLOGY].

Table 5: Clinically Important Drug Interactions with REMERON/REMERONSolTab

Monoamine Oxidase Inhibitors (MAOIs)
Clinical Impact	The concomitant use of serotonergic drugs, including REMERON/REMERONSolTab, and MAOIs increases the risk of serotonin syndrome.
Intervention	REMERON/REMERONSolTab is contraindicated in patients taking MAOIs, including MAOIs such as linezolid or intravenous methylene blue [see DOSAGE AND ADMINISTRATION, CONTRAINDICATIONS, WARNINGS AND PRECAUTIONS].
Examples	selegiline, tranylcypromine, isocarboxazid, phenelzine, linezolid, methylene blue
Other Serotonergic Drugs
Clinical Impact	The concomitant use of serotonergic drugs with REMERON/REMERONSolTab increases the risk of serotonin syndrome.
Intervention	Monitor patients for signs and symptoms of serotonin syndrome, particularly during treatment initiation and dosage increases. If serotonin syndrome occurs, consider discontinuation of REMERON/REMERONSolTab and/or concomitant serotonergic drugs [see WARNINGS AND PRECAUTIONS].
Examples	SSRIs, SNRIs, triptans, tricyclic antidepressants, fentanyl, lithium, amphetamines, St. John’s Wort, tramadol, tryptophan, buspirone
Strong CYP3A Inducers
Clinical Impact	The concomitant use of strong CYP3A inducers with REMERON/REMERONSolTab decreases the plasma concentration of mirtazapine [see CLINICAL PHARMACOLOGY].
Intervention	Increase the dose of REMERON/REMERONSolTab if needed with concomitant CYP3A inducer use. Conversely, a decrease in dosage of REMERON/REMERONSolTab may be needed if the CYP3A inducer is discontinued [see DOSAGE AND ADMINISTRATION].
Examples	phenytoin, carbamazepine, rifampin
Strong CYP3A Inhibitors
Clinical Impact	The concomitant use of strong CYP3A inhibitors with REMERON/REMERONSolTab may increase the plasma concentration of mirtazapine [see CLINICAL PHARMACOLOGY].
Intervention	Decrease the dose of REMERON/REMERONSolTab if needed with concomitant strong CYP3A inhibitor use. Conversely, an increase in dosage of REMERON/REMERONSolTab may be needed if the CYP3A inhibitor is discontinued [see DOSAGE AND ADMINISTRATION].
Examples	itraconazole, ritonavir, nefazodone
Cimetidine
Clinical Impact	The concomitant use of cimetidine, a CYP1A2, CYP2D6, and CYP3A inhibitor, with REMERON/REMERONSolTab may increase the plasma concentration of mirtazapine [see CLINICAL PHARMACOLOGY].
Intervention	Decrease the dose of REMERON/REMERONSolTab if needed with concomitant cimetidine use. Conversely, an increase in dosage of REMERON/REMERONSolTab may be needed if cimetidine is discontinued [see DOSAGE AND ADMINISTRATION].
Benzodiazepines and Alcohol
Clinical Impact	The concomitant use of benzodiazepines or alcohol with REMERON/REMERONSolTab increases the impairment of cognitive and motor skills produced by REMERON/REMERONSolTab alone.
Intervention	Avoid concomitant use of benzodiazepines and alcohol with REMERON/REMERONSolTab [see WARNINGS AND PRECAUTIONS, CLINICAL PHARMACOLOGY].
Examples	diazepam, alprazolam, alcohol
Drugs that Prolong QTc Interval
Clinical Impact	The concomitant use of other drugs which prolong the QTc interval with REMERON/REMERONSolTab, increase the risk of QTc prolongation and/or ventricular arrhythmias (e.g., Torsades de Pointes).
Intervention	Use caution when using REMERON/REMERONSolTab concomitantly with drugs that prolong the QTc interval [see WARNINGS AND PRECAUTIONS, CLINICAL PHARMACOLOGY].
Warfarin
Clinical Impact	The concomitant use of warfarin with REMERON/REMERONSolTab may result in an increase in INR [see CLINICAL PHARMACOLOGY].
Intervention	Monitor INR during concomitant use of warfarin with REMERON/REMERONSolTab.

Warnings & Precautions

WARNINGS

Included as part of the "PRECAUTIONS" Section

PRECAUTIONS

Suicidal Thoughts And Behaviors In Adolescents And Young Adults

In pooled analyses of placebo-controlled trials of antidepressant drugs (SSRIs and other antidepressant classes) that included approximately 77,000 adult patients and 4,500 pediatric patients, the incidence of suicidal thoughts and behaviors in antidepressant-treated patients age 24 years and younger was greater than in placebo-treated patients. There was considerable variation in risk of suicidal thoughts and behaviors among drugs, but there was an increased risk identified in young patients for most drugs studied. There were differences in absolute risk of suicidal thoughts and behaviors across the different indications, with the highest incidence in patients with MDD. The drug-placebo differences in the number of cases of suicidal thoughts and behaviors per 1000 patients treated are provided in Table 1.

Table 1: Risk Differences of the Number of Patients with Suicidal Thoughts andBehavior in the Pooled Placebo-Controlled Trials of Antidepressants in Pediatricand Adult Patients

Age Range	Drug-Placebo Difference in Number of Patients with Suicidal Thoughts or Behaviors per 1000 Patients Treated
	Increases Compared to Placebo
<18 years old	14 additional patients
18–24 years old	5 additional patients
	Decreases Compared to Placebo
25–64 years old	1 fewer patient
≥65 years old	6 fewer patients

It is unknown whether the risk of suicidal thoughts and behaviors in children, adolescents, and young adults extends to longer-term use, i.e., beyond four months. However, there is substantial evidence from placebo-controlled maintenance trials in adults with MDD that antidepressants delay the recurrence of depression and that depression itself is a risk factor for suicidal thoughts and behaviors.

Monitor all antidepressant-treated patients for any indication of clinical worsening and emergence of suicidal thoughts and behaviors, especially during the initial few months of drug therapy, and at times of dosage changes. Counsel family members or caregivers of patients to monitor for changes in behavior and to alert the healthcare provider. Consider changing the therapeutic regimen, including possibly discontinuing REMERON/REMERONSolTab, in patients whose depression is persistently worse, or who are experiencing emergent suicidal thoughts or behaviors.

Agranulocytosis

In premarketing clinical trials, 2 (1 with Sjögren’s Syndrome) out of 2796 patients treated with REMERON developed agranulocytosis [absolute neutrophil count (ANC) <500/mm³ with associated signs and symptoms, e.g., fever, infection, etc.] and a third patient developed severe neutropenia (ANC <500/mm³ without any associated symptoms). For these 3 patients, onset of severe neutropenia was detected on days 61, 9, and 14 of treatment, respectively. All 3 patients recovered after REMERON was stopped. If a patient develops a sore throat, fever, stomatitis, or other signs of infection, along with a low white blood cell (WBC) count, treatment with REMERON/REMERONSolTab should be discontinued and the patient should be closely monitored.

Serotonin Syndrome

Serotonergic antidepressants, including REMERON/REMERONSolTab, can precipitate serotonin syndrome, a potentially life-threatening condition. The risk is increased with concomitant use of other serotonergic drugs (including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, amphetamines, and St. John’s Wort) and with drugs that impair metabolism of serotonin, i.e., MAOIs [see CONTRAINDICATIONS, DRUG INTERACTIONS]. Serotonin syndrome can also occur when these drugs are used alone.

Serotonin syndrome signs and symptoms may include mental status changes (e.g., agitation, hallucinations, delirium, and coma), autonomic instability (e.g., tachycardia, labile blood pressure, dizziness, diaphoresis, flushing, hyperthermia), neuromuscular symptoms (e.g., tremor, rigidity, myoclonus, hyperreflexia, incoordination), seizures, and gastrointestinal symptoms (e.g., nausea, vomiting, diarrhea).

The concomitant use of REMERON/REMERONSolTab with MAOIs is contraindicated. In addition, do not initiate REMERON/REMERONSolTab in a patient being treated with MAOIs such as linezolid or intravenous methylene blue. No reports involved the administration of methylene blue by other routes (such as oral tablets or local tissue injection). If it is necessary to initiate treatment with an MAOI such as linezolid or intravenous methylene blue in a patient taking REMERON/REMERONSolTab, discontinue REMERON/REMERONSolTab before initiating treatment with the MAOI [see CONTRAINDICATIONS, DRUG INTERACTIONS].

Monitor all patients taking REMERON/REMERONSolTab for the emergence of serotonin syndrome. Discontinue treatment with REMERON/REMERONSolTab and any concomitant serotonergic agents immediately if the above symptoms occur, and initiate supportive symptomatic treatment. If concomitant use of REMERON/REMERONSolTab with other serotonergic drugs is clinically warranted, inform patients of the increased risk for serotonin syndrome and monitor for symptoms.

Angle-Closure Glaucoma

The pupillary dilation that occurs following use of many antidepressant drugs, including REMERON/REMERONSolTab, may trigger an angle-closure attack in a patient with anatomically narrow angles who does not have a patent iridectomy.

QTc Prolongation And Torsades De Pointes

The effect of REMERON (mirtazapine) on QTc interval was assessed in a clinical randomized trial with placebo and positive (moxifloxacin) controls involving 54 healthy volunteers using exposure response analysis. This trial showed a positive relationship between mirtazapine concentrations and prolongation of the QTc interval. However, the degree of QT prolongation observed with both 45 mg and 75 mg (1.67 times the maximum recommended daily dose) doses of mirtazapine was not at a level generally considered to be clinically meaningful. During postmarketing use of mirtazapine, cases of QT prolongation, Torsades de Pointes, ventricular tachycardia, and sudden death, have been reported [see ADVERSE REACTIONS]. The majority of reports occurred in association with overdose or in patients with other risk factors for QT prolongation, including concomitant use of QTc-prolonging medicines [see DRUG INTERACTIONS and OVERDOSE]. Exercise caution when REMERON/REMERONSolTab is prescribed in patients with known cardiovascular disease or family history of QT prolongation, and in concomitant use with other drugs thought to prolong the QTc interval.

Increased Appetite And Weight Gain

In U.S. controlled clinical studies, appetite increase was reported in 17% of patients treated with REMERON, compared to 2% for placebo. In these same trials, weight gain of ≥7% of body weight was reported in 7.5% of patients treated with mirtazapine, compared to 0% for placebo. In a pool of premarketing U.S. clinical studies, including many patients for long-term, open-label treatment, 8% of patients receiving REMERON discontinued for weight gain.

In an 8-week-long pediatric clinical trial of doses between 15 to 45 mg/day, 49% of REMERON-treated pediatric patients had a weight gain of at least 7%, compared to 5.7% of placebo-treated patients. The safety and effectiveness of REMERON/REMERONSolTab in pediatric patients with MDD have not been established [see Use In Specific Populations].

Somnolence

In U.S. controlled studies, somnolence was reported in 54% of patients treated with REMERON, compared to 18% for placebo. In these studies, somnolence resulted in discontinuation for 10.4% of REMERON-treated patients, compared to 2.2% for placebo. It is unclear whether tolerance develops to the somnolent effects of REMERON/REMERONSolTab. Because of the potentially significant effects of REMERON/REMERONSolTab on impairment of performance, caution patients about engaging in activities that require alertness, including operating hazardous machinery and motor vehicles, until they are reasonably certain that REMERON/REMERONSolTab does not affect them adversely. The concomitant use of benzodiazepines and alcohol with REMERON/REMERONSolTab should be avoided [see DRUG INTERACTIONS].

Activation Of Mania Or Hypomania

In patients with bipolar disorder, treating a depressive episode with REMERON/REMERONSolTab or another antidepressant may precipitate a mixed/manic episode. In controlled clinical trials, patients with bipolar disorder were generally excluded; however, symptoms of mania or hypomania were reported in 0.2% of patients treated with REMERON. Prior to initiating treatment with REMERON/REMERONSolTab, screen patients for any personal or family history of bipolar disorder, mania, or hypomania.

Seizures

REMERON/REMERONSolTab has not been systematically evaluated in patients with seizure disorders. In premarketing clinical trials, 1 seizure was reported among the 2796 U.S. and non-U.S. patients treated with REMERON. REMERON/REMERONSolTab should be prescribed with caution in patients with a seizure disorder.

Elevated Cholesterol And Triglycerides

In U.S. controlled studies, nonfasting cholesterol increases to ≥20% above the upper limits of normal were observed in 15% of patients treated with REMERON, compared to 7% for placebo. In these same studies, nonfasting triglyceride increases to ≥500 mg/dL were observed in 6% of patients treated with REMERON, compared to 3% for placebo.

Hyponatremia

Hyponatremia may occur as a result of treatment with serotonergic antidepressants, including REMERON/REMERONSolTab. Cases with serum sodium lower than 110 mmol/L have been reported.

Signs and symptoms of hyponatremia include headache, difficulty concentrating, memory impairment, confusion, weakness, and unsteadiness, which may lead to falls. Signs and symptoms associated with more severe or acute cases have included hallucination, syncope, seizure, coma, respiratory arrest, and death. In many cases, this hyponatremia appears to be the result of the syndrome of inappropriate antidiuretic hormone secretion (SIADH).

In patients with symptomatic hyponatremia, discontinue REMERON/REMERONSolTab and institute appropriate medical intervention. Elderly patients, patients taking diuretics, and those who are volume-depleted may be at greater risk of developing hyponatremia [see Use In Specific Populations].

Transaminase Elevations

Clinically significant ALT (SGPT) elevations (≥3 times the upper limit of the normal range) were observed in 2.0% (8/424) of patients treated with REMERON in a pool of short-term, U.S. controlled trials, compared to 0.3% (1/328) of placebo patients. While some patients were discontinued for the ALT increases, in other cases, the enzyme levels returned to normal despite continued REMERON treatment. REMERON/REMERONSolTab should be used with caution in patients with impaired hepatic function [see Use In Specific Populations, CLINICAL PHARMACOLOGY].

Discontinuation Syndrome

There have been reports of adverse reactions upon the discontinuation of REMERON/REMERONSolTab (particularly when abrupt), including but not limited to the following: dizziness, abnormal dreams, sensory disturbances (including paresthesia and electric shock sensations), agitation, anxiety, fatigue, confusion, headache, tremor, nausea, vomiting, and sweating, or other symptoms which may be of clinical significance.

A gradual reduction in the dosage, rather than an abrupt cessation, is recommended [see DOSAGE AND ADMINISTRATION].

Use In Patients With Concomitant Illness

REMERON/REMERONSolTab has not been systematically evaluated or used to any appreciable extent in patients with a recent history of myocardial infarction or other significant heart disease. REMERON was associated with significant orthostatic hypotension in early clinical pharmacology trials with normal volunteers. Orthostatic hypotension was infrequently observed in clinical trials with depressed patients

[see ADVERSE REACTIONS]. REMERON/REMERONSolTab should be used with caution in patients with known cardiovascular or cerebrovascular disease that could be exacerbated by hypotension (history of myocardial infarction, angina, or ischemic stroke) and conditions that would predispose patients to hypotension (dehydration, hypovolemia, and treatment with antihypertensive medication).

Risks In Patients With Phenylketonuria

Phenylalanine can be harmful to patients with phenylketonuria (PKU). REMERONSolTab contains phenylalanine, a component of aspartame. REMERONSolTab contains the following amount of phenylalanine: 2.6 mg in 15 mg orally disintegrating tablet, 5.2 mg in 30 mg orally disintegrating tablet, and 7.8 mg in 45 mg orally disintegrating tablet. Before prescribing REMERONSolTab to a patient with PKU, consider the combined daily amount of phenylalanine from all sources, including REMERONSolTab.

Patient Counseling Information

Advise the patient to read the FDA-approved patient labeling (Medication Guide).

Suicidal Thoughts And Behaviors

Advise patients and caregivers to look for the emergence of suicidality, especially early during treatment and when the dosage is adjusted up or down, and instruct them to report such symptoms to the healthcare provider [see BOX WARNING and WARNINGS AND PRECAUTIONS].

Agranulocytosis

Advise patients to contact their physician if they experience fever, chills, sore throat, mucous membrane ulceration, flu-like complaints, or other symptoms that might suggest infection [see WARNINGS AND PRECAUTIONS].

Serotonin Syndrome

Caution patients about the risk of serotonin syndrome, particularly with the concomitant use of REMERON/REMERONSolTab with other serotonergic drugs including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, amphetamines, St. John’s Wort, and with drugs that impair metabolism of serotonin (in particular, MAOIs, both those intended to treat psychiatric disorders and also others, such as linezolid). Advise patients to contact their healthcare provider or report to the emergency room if they experience signs or symptoms of serotonin syndrome [see DOSAGE AND ADMINISTRATION, CONTRAINDICATIONS, WARNINGS AND PRECAUTIONS, DRUG INTERACTIONS].

QTc Prolongation And Torsades De Pointes

Inform patients to consult their physician immediately if they feel faint, lose consciousness, or have heart palpitations [see WARNINGS AND PRECAUTIONS, DRUG INTERACTIONS, OVERDOSE ]. Advise patients to inform physicians that they are taking REMERON/REMERONSolTab before any new drug is taken.

Somnolence

Advise patients that REMERON/REMERONSolTab may impair judgment, thinking, and particularly, motor skills, because of its prominent sedative effect. Caution patients about performing activities requiring mental alertness, such as operating hazardous machinery or operating a motor vehicle, until they are reasonably certain that REMERON/REMERONSolTab therapy does not adversely affect their ability to engage in such activities. [see WARNINGS AND PRECAUTIONS].

Alcohol

Advise patients to avoid alcohol while taking REMERON/REMERONSolTab [see WARNINGS AND PRECAUTIONS, DRUG INTERACTIONS].

Activation Of Mania/Hypomania

Advise patients and their caregivers to observe for signs of activation of mania/hypomania and instruct them to report such symptoms to the healthcare provider [see WARNINGS AND PRECAUTIONS].

Discontinuation Syndrome

Advise patients not to abruptly discontinue REMERON/REMERONSolTab and to discuss any tapering regimen with their healthcare provider. Adverse reactions can occur when REMERON/REMERONSolTab is discontinued [see DOSAGE AND ADMINISTRATION, WARNINGS AND PRECAUTIONS].

Allergic Reactions

Advise patients to notify their healthcare provider if they develop an allergic reaction such as rash, hives,swelling, or difficulty breathing [see CONTRAINDICATIONS, ADVERSE REACTIONS].

Pregnancy

Advise patients to notify their physician if they become pregnant or intend to become pregnant during REMERON/REMERON SolTab therapy [see Use In Specific Populations].

Nursing

Advise patients to notify their physician if they are breastfeeding an infant [see Use In Specific Populations].

Angle-Closure Glaucoma

Patients should be advised that taking REMERON can cause mild pupillary dilation, which in susceptible individuals, can lead to an episode of angle-closure glaucoma. Pre-existing glaucoma is almost always open-angle glaucoma because angle-closure glaucoma, when diagnosed, can be treated definitively with iridectomy. Open-angle glaucoma is not a risk factor for angle-closure glaucoma. Patients may wish to be examined to determine whether they are susceptible to angle-closure, and have a prophylactic procedure (e.g., iridectomy), if they are susceptible [see WARNINGS AND PRECAUTIONS.]

Patients With Phenylketonuria

Inform patients with phenylketonuria that REMERONSolTab contains phenylalanine [see WARNINGS AND PRECAUTIONS].

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment Of Fertility

Carcinogenesis

Carcinogenicity studies were conducted with mirtazapine given in the diet at doses of 2, 20, and 200 mg/kg/day to mice and 2, 20, and 60 mg/kg/day to rats. The highest doses used are approximately 20 and 12 times the maximum recommended human dose (MRHD) of 45 mg/day, based on body surface area (mg/m²) in mice and rats, respectively. There was an increased incidence of hepatocellular adenoma and carcinoma in male mice at the high dose. In rats, there was an increase in hepatocellular adenoma in females at the mid and high doses and in hepatocellular tumors and thyroid follicular adenoma/cystadenoma and carcinoma in males at the high dose.

Mutagenesis

Mirtazapine was not mutagenic or clastogenic and did not induce general DNA damage as determined in several genotoxicity tests: Ames test, in vitro gene mutation assay in Chinese hamster V 79 cells, in vitro sister chromatid exchange assay in cultured rabbit lymphocytes, in vivo bone marrow micronucleus test in rats, and unscheduled DNA synthesis assay in HeLa cells.

Impairment Of Fertility

In a fertility study in rats, mirtazapine was given at doses up to 100 mg/kg [20 times the maximum recommended human dose (MRHD), based on body surface area (mg/m²)]. Mating and conception were not affected by the drug, but estrous cycling was disrupted at doses that were 3 or more times the MRHD, and pre-implantation losses occurred at 20 times the MRHD.

Use In Specific Populations

Pregnancy

Reproduction studies in pregnant rats and rabbits at doses up to 100 mg/kg and 40 mg/kg, respectively [20 and 17 times the maximum recommended human dose (MRHD) on an mg/m² basis, respectively], have revealed no evidence of teratogenic effects. However, in rats, there was an increase in post-implantation losses in dams treated with mirtazapine. There was an increase in pup deaths during the first 3 days of lactation and a decrease in pup birth weights. The cause of these deaths is not known. The effects occurred at doses that were 20 times the MRHD, but not at 3 times the MRHD, on an mg/m² basis. There are no adequate and well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, REMERON/REMERONSolTab should be used during pregnancy only if clearly needed.

Nursing Mothers

Mirtazapine may be excreted in breast milk. Exercise caution when administering REMERON/REMERONSolTab to nursing women.

Pediatric Use

The safety and effectiveness of REMERON/REMERONSolTab have not been established in pediatric patients with MDD. Two placebo-controlled trials in 258 pediatric patients with MDD have been conducted with REMERON, and the data were insufficient to establish the safety and effectiveness of REMERON/REMERONSolTab in pediatric patients with MDD.

Antidepressants increased the risk of suicidal thoughts and behaviors in pediatric patients [see BOX WARNING and WARNINGS AND PRECAUTIONS].

In an 8-week-long clinical trial in pediatric patients receiving doses between 15 to 45 mg per day, 49% of REMERON-treated patients had a weight gain of at least 7%, compared to 5.7% of placebo-treated patients. The mean increase in weight was 4 kg (2 kg SD) for REMERON-treated patients versus 1 kg (2 kg SD) for placebo-treated patients [see WARNINGS AND PRECAUTIONS].

Geriatric Use

Approximately 190 patients ≥65 years of age participated in clinical studies with REMERON. REMERON/REMERONSolTab is known to be substantially excreted by the kidney (75%), and the risk of decreased clearance of this drug is greater in patients with impaired renal function. Pharmacokinetic studies revealed a decreased clearance of mirtazapine in the elderly [see CLINICAL PHARMACOLOGY ].

Sedating drugs, including REMERON/REMERONSolTab, may cause confusion and over-sedation in the elderly. Elderly patients may be at greater risk of developing hyponatremia. Caution is indicated when administering REMERON/REMERONSolTab to elderly patients [see WARNINGS AND PRECAUTIONS and CLINICAL PHARMACOLOGY]. In general, dose selection for an elderly patient should be conservative, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

Renal Or Hepatic Impairment

The clearance of mirtazapine is reduced in patients with moderate to severe renal or hepatic impairment. Consequently, plasma mirtazapine levels may be increased in these patient groups, compared to levels observed in patients without renal or hepatic impairment. Dosage decrease may be necessary when administering REMERON/REMERONSolTab to patients with moderate to severe renal or hepatic impairment [see WARNINGS AND PRECAUTIONS, Geriatric Use, and CLINICAL PHARMACOLOGY].

Patients With Phenylketonuria

REMERONSolTab contains phenylalanine, a component of aspartame. REMERONSolTab contains the following amount of phenylalanine: 2.6 mg in 15 mg orally disintegrating tablet, 5.2 mg in 30 mg orally disintegrating tablet, and 7.8 mg in 45 mg orally disintegrating tablet [see WARNINGS AND PRECAUTIONS].

Overdosage & Contraindications

OVERDOSE

Human Experience

In premarketing clinical studies, there were reports of REMERON overdose alone or in combination with other pharmacological agents. Signs and symptoms reported in association with overdose included disorientation, drowsiness, impaired memory, and tachycardia.

Based on postmarketing reports, serious outcomes (including fatalities) may occur at dosages higher than the recommended doses, especially with mixed overdoses. In these cases, QT prolongation and Torsades de Pointes have also been reported [see WARNINGS AND PRECAUTIONS, ADVERSE REACTIONS, and DRUG INTERACTIONS].

Overdose Management

No specific antidotes for mirtazapine are known.

Contact Poison Control (1-800-222-1222) for the latest recommendations.

CONTRAINDICATIONS

REMERON/REMERONSolTab Is Contraindicated In Patients

Taking, or within 14 days of stopping, MAOIs (including the MAOIs linezolid and intravenous methylene blue) because of an increased risk of serotonin syndrome [see WARNINGS AND PRECAUTIONS, DRUG INTERACTIONS].
With a known hypersensitivity to mirtazapine or to any of the excipients in REMERON/REMERONSolTab. Severe skin reactions, including Stevens-Johnson syndrome, bullous dermatitis, erythema multiforme and toxic epidermal necrolysis have been reported following the use of REMERON/REMERONSolTab [see ADVERSE REACTIONS].

Clinical Pharmacology

CLINICAL PHARMACOLOGY

Mechanism Of Action

The mechanism of action of mirtazapine for the treatment of major depressive disorder, is unclear. However, its efficacy could be mediated through its activity as an antagonist at central presynaptic α₂adrenergic inhibitory autoreceptors and heteroreceptors and enhancing central noradrenergic and serotonergic activity.

Pharmacodynamics

In preclinical studies, mirtazapine acts as an antagonist at α₂-adrenergic inhibitory autoreceptors and heteroreceptors and as an antagonist at serotonin 5-HT₂ and 5-HT₃ receptors. Mirtazapine has no significant affinity for the 5-HT_1A and 5-HT_1B receptors.

Mirtazapine also acts as an antagonist of histamine (H₁) receptors, peripheral α₁-adrenergic receptors, and muscarinic receptors. Actions at these receptors may explain some of the other clinical effects of mirtazapine (e.g., its prominent somnolent effects and orthostatic hypotension may be explained by its inhibition of histamine (H₁) receptors and peripheral α₁-adrenergic receptors, respectively).

Cardiac Electrophysiology

The effect of REMERON (mirtazapine) on QTc interval was assessed in healthy subjects. At a dose of 75 mg (1.67 times the maximum recommended dosage), REMERON does not prolong the QTc interval to a clinically meaningful extent.

Pharmacokinetics

Plasma levels of mirtazapine are linearly related to dose over a dose range of 15 to 80 mg (1.78 times the maximum recommended dose). Steady state plasma levels of mirtazapine are attained within 5 days, with about 50% accumulation (accumulation ratio=1.5). The (–) enantiomer has an elimination half-life that is approximately twice as long as the (+) enantiomer and therefore achieves plasma levels that are about 3 times as high as that of the (+) enantiomer.

Absorption

Mirtazapine has an absolute bioavailability of about 50% following oral administration. Peak plasma concentrations of mirtazapine are reached within about 2 hours post dose.

Food Effect

The presence of food in the stomach has a minimal effect on both the rate and extent of absorption.

Distribution

Mirtazapine is approximately 85% bound to plasma proteins over a concentration range of 0.01 to 10 mcg/mL.

Elimination

Mirtazapine has a half-life of about 20 to 40 hours following oral administration of REMERON or REMERONSolTab.

Metabolism

Mirtazapine is extensively metabolized after oral administration. Major pathways of bio-transformation are demethylation and hydroxylation followed by glucuronide conjugation. In vitro data from human liver microsomes indicate that CYP2D6 and CYP1A2 are involved in the formation of the 8-hydroxy metabolite of mirtazapine, whereas CYP3A is considered to be responsible for the formation of the N-desmethyl and N-oxide metabolite. Several unconjugated metabolites possess pharmacological activity but are present in the plasma at very low levels.

Excretion

Mirtazapine and its metabolites are eliminated predominantly (75%) via urine with 15% in feces.

Specific Populations

Geriatric Patients

Following oral administration of REMERON Tablets 20 mg/day for 7 days to subjects of varying ages (range 25 to 74 years old), oral clearance of mirtazapine was reduced in the elderly compared to the younger subjects. The clearance in elderly males was 40% lower compared to younger males, while the clearance was 10% lower in elderly females compared to younger females [see WARNINGS AND PRECAUTIONS, Use In Specific Populations].

Male And Female Patients

The mean elimination half-life of mirtazapine after oral administration ranges from approximately 20 to 40 hours across age and gender subgroups, with females of all ages exhibiting significantly longer elimination half-lives than males (mean half-life of 37 hours for females vs. 26 hours for males).

Race

There have been no clinical studies to evaluate the effect of race on the pharmacokinetics of REMERON.

Patients With Renal Impairment

When compared to subjects with normal renal function, total body clearance of mirtazapine was reduced approximately 30% in renal impaired patients with GFR=11–39 mL/min/1.73 m² and approximately 50% in renal impaired patients with GFR=<10 mL/min/1.73 m²) [see WARNINGS AND PRECAUTIONS, Use In Specific Populations].

Patients With Hepatic Impairment

Following a single 15-mg oral dose of REMERON, the oral clearance of mirtazapine in patients with hepatic impairment was decreased by approximately 30%, compared to subjects with normal hepatic function [see WARNINGS AND PRECAUTIONS, Use In Specific Populations].

Drug Interactions Studies

Warfarin

Mirtazapine (30 mg daily) at steady state caused a statistically significant increase (0.2) in the International Normalized Ratio (INR) in subjects treated with warfarin [see DRUG INTERACTIONS].

QTc-Prolonging Drugs

The risk of QT prolongation and/or ventricular arrhythmias (e.g., Torsades de Pointes) may be increased with concomitant use of medicines which prolong the QTc interval (e.g., some antipsychotics and antibiotics) and in mirtazapine overdose [see WARNINGS AND PRECAUTIONS, ADVERSE REACTIONS, DRUG INTERACTIONS, and OVERDOSE].

Phenytoin

In healthy male subjects (n=18), phenytoin (200 mg daily, at steady state) increased mirtazapine (30 mg daily, at steady state) clearance about 2-fold, resulting in a decrease in average plasma mirtazapine concentrations of 45% [see DRUG INTERACTIONS]. Mirtazapine did not significantly affect the pharmacokinetics of phenytoin.

Carbamazepine

In healthy male subjects (n=24), carbamazepine (400 mg twice a day, at steady state) increased mirtazapine (15 mg twice a day, at steady state) clearance about 2-fold, resulting in a decrease in average plasma mirtazapine concentrations of 60% [see DRUG INTERACTIONS].

Cimetidine

In healthy male subjects (n=12), when cimetidine, a weak inhibitor of CYP1A2, CYP2D6, and CYP3A4, given at 800 mg b.i.d. at steady state was coadministered with mirtazapine (30 mg daily) at steady state, the Area Under the Curve (AUC) of mirtazapine increased more than 50% [see DRUG INTERACTIONS]. Mirtazapine did not cause relevant changes in the pharmacokinetics of cimetidine.

Ketoconazole

In healthy male Caucasian subjects (n=24), coadministration of the strong CYP3A4 inhibitor ketoconazole (200 mg b.i.d. for 6.5 days) increased the peak plasma levels and the AUC of a single 30 mg dose of mirtazapine by approximately 40% and 50%, respectively [see DRUG INTERACTIONS].

Amitriptyline

In healthy, CYP2D6 extensive metabolizer patients (n=32), amitriptyline (75 mg daily), at steady state, did not cause relevant changes to the pharmacokinetics of steady state mirtazapine (30 mg daily); mirtazapine also did not cause relevant changes to the pharmacokinetics of amitriptyline.

Paroxetine

In healthy CYP2D6 extensive metabolizer subjects (n=24), mirtazapine (30 mg/day), at steady state, did not cause relevant changes in the pharmacokinetics of steady state paroxetine (40 mg/day), a CYP2D6 inhibitor.

Lithium

No relevant clinical effects or significant changes in pharmacokinetics have been observed in healthy male subjects on concurrent treatment with lithium 600 mg/day for 10 days at steady state and a single 30 mg dose of mirtazapine. The effects of higher doses of lithium on the pharmacokinetics of mirtazapine are unknown.

Risperidone

Mirtazapine (30 mg daily) at steady state did not influence the pharmacokinetics of risperidone (up to 3 mg twice a day) in subjects (n=6) in need of treatment with an antipsychotic and antidepressant drug.

Alcohol

Concomitant administration of alcohol (equivalent to 60 g) had a minimal effect on plasma levels of mirtazapine (15 mg) in 6 healthy male subjects. However, the impairment of cognitive and motor skills produced by REMERON were shown to be additive with those produced by alcohol.

Diazepam

Concomitant administration of diazepam (15 mg) had a minimal effect on plasma levels of mirtazapine (15 mg) in 12 healthy subjects. However, the impairment of motor skills produced by REMERON has been shown to be additive with those caused by diazepam.

Clinical Studies

The efficacy of REMERON as a treatment for major depressive disorder was established in 4 placebo-controlled, 6-week trials in adult outpatients meeting DSM-III criteria for major depressive disorder. Patients were titrated with REMERON from a dose range of 5 mg to 35 mg/day. The mean mirtazapine dose for patients who completed these 4 studies ranged from 21 to 32 mg/day. Overall, these studies demonstrated REMERON to be superior to placebo on at least 3 of the following 4 measures: 21-Item Hamilton Depression Rating Scale (HDRS) total score; HDRS Depressed Mood Item; CGI Severity score; and Montgomery and Asberg Depression Rating Scale (MADRS). Superiority of REMERON over placebo was also found for certain factors of the HDRS, including anxiety/somatization factor and sleep disturbance factor.

Examination of age and gender subsets of the population did not reveal any differential responsiveness on the basis of these subgroupings.

In a longer-term study, patients meeting (DSM-IV) criteria for major depressive disorder who had responded during an initial 8 to 12 weeks of acute treatment on REMERON were randomized to continuation of REMERON or placebo for up to 40 weeks of observation for relapse. Response during the open phase was defined as having achieved a HAM-D 17 total score of ≤8 and a CGI-Improvement score of 1 or 2 at 2 consecutive visits beginning with week 6 of the 8 to 12 weeks in the open-label phase of the study. Relapse during the double-blind phase was determined by the individual investigators. Patients receiving continued REMERON treatment experienced significantly lower relapse rates over the subsequent 40 weeks compared to those receiving placebo. This pattern was demonstrated in both male and female patients.

Medication Guide

PATIENT INFORMATION

REMERON^®
(rem' - e - ron)
(mirtazapine) tablets, for oral use

REMERONSolTab^®
(rem' -e -ron -sol' - tab)
(mirtazapine) orally disintegrating tablets, for oral use

What is the most important information I should know about REMERON and REMERONSolTab?

REMERON and REMERONSolTab may cause serious side effects, including:

How can I watch for and try to prevent suicidal thoughts and actions?

Increased risk of suicidal thoughts or actions in some children and young adults. REMERON, REMERONSolTab, and other antidepressant medicines may increase suicidal thoughts or actions in some people 24 years of age and younger, especially within the first few months of treatment or when the dose ischanged. REMERON and REMERONSolTab are not for use in children.
- Depression or other serious mental illnesses are the most important causes of suicidal thoughts oractions.
- Pay close attention to any changes, especially sudden changes in mood, behavior, thoughts, or feelings, or if you develop suicidal thoughts or actions. This is very important when an antidepressant medicine is started or when the dose is changed.
- Call your healthcare provider right away to report new or sudden changes in mood, behavior, thoughts, or feelings.
- Keep all follow-up visits with your healthcare provider as scheduled. Call your healthcare provider between visits as needed, especially if you have concerns about symptoms.

Call your healthcare provider or get emergency medical help right away if you or your family member have any of the following symptoms, especially if they are new, worse, or worry you:

attempts to commit suicide
acting on dangerous impulses
acting aggressive, being angry or violent
thoughts about suicide or dying
new or worse depression
panic attacks
new or worse anxiety
feeling very agitated or restless
new or worse irritability
an extreme increase in activity or talking (mania
)
trouble sleeping
other unusual changes in behavior or mood

What is REMERON and REMERONSolTab?

REMERON and REMERONSolTab are prescription medicines used to treat a certain type of depression called Major Depressive Disorder (MDD) in adults.

It is not known if REMERON and REMERONSolTab are safe and effective for use to treat MDD in children.

Who should not take REMERON and REMERONSolTab?

Do not take REMERON or REMERONSolTab if you:

take a Monoamine Oxidase Inhibitor (MAOI)
have stopped taking an MAOI in the last 14 days
are being treated with the antibiotic linezolid or intravenous methylene blue
if you are allergic to mirtazapine or any of the ingredients in REMERON or REMERONSolTab. See the end of this Medication Guide for a complete list of ingredients in REMERON and REMERONSolTab.

Ask your healthcare provider or pharmacist if you are not sure if you take an MAOI, including the antibiotic linezolid or intravenous methylene blue.

Do not start taking an MAOI for at least 14 days after you stop treatment with REMERON or REMERONSolTab.

Before taking REMERON or REMERONSolTab, tell your healthcare provider about all your medical conditions,including if you:

have a history of suicide or depression
have a history or family history of bipolar disorder, mania or hypomania
have a low white blood cell count
have glaucoma (high pressure in the eye)
have or had heart problems or stroke
have an abnormal heart beat called QT prolongation or a family history of QT prolongation
have seizures
have high cholesterol or triglyceride levels
have low sodium levels in your blood
have or had kidney or liver problems
have low blood pressure
have phenylketonuria (PKU). REMERONSolTab contains phenylalanine which is a part of aspartame.
are pregnant or plan to become pregnant. It is not known if REMERON and REMERONSolTab will harm your unborn baby. Talk to your healthcare provider if you become pregnant or think you may be pregnant during treatment with REMERON and REMERONSolTab.
are breastfeeding or plan to breastfeed. REMERON and REMERONSolTab may pass into your breast milk. Talk to your healthcare provider about the best way to feed your baby during treatment with REMERON and REMERONSolTab.

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

REMERON and REMERONSolTab and other medicines may affect each other causing possible serious side effects.

REMERON and REMERONSolTab may affect the way other medicines work and other medicines may affect the way REMERON and REMERONSolTab work.

Especially tell your healthcare provider if you take:

MAOIs
medicines to treat migraine headaches known as triptans
tricyclic antidepressants
fentanyl
lithium
tramadol
tryptophan
buspirone
amphetamines
benzodiazepines
St. John’s Wort
medicines used to treat mood, anxiety, psychotic or thought disorders, including selective serotonin reuptake inhibitors (SSRIs) and serotonin norepinephrine reuptake inhibitors(SNRIs)
medicines that may affect your heart rhythm (such as certain antibiotics and some antipsychotics)

Ask your healthcare provider if you are not sure if you are taking any of these medicines. Your healthcare provider can tell you if it is safe to take REMERON and REMERONSolTab with your other medicines.

Do not start or stop any other medicines during treatment with REMERON or REMERONSolTab without talking to your healthcare provider first. Stopping REMERON or REMERONSolTab suddenly may cause you to have serious side effects. See, “What are the possible side effects of REMERON and REMERONSolTab?”

Know the medicines you take. Keep a list of them to show to your healthcare provider and pharmacist when you get a new medicine.

How should I take REMERON or REMERONSolTab?

Take REMERON and REMERONSolTab exactly as your healthcare provider tells you to. Do not change your dose or stop taking REMERON or REMERONSolTab without first talking to your healthcare provider.
Your healthcare provider may need to change the dose of REMERON or REMERONSolTab until it is the right dose for you.
Take REMERON or REMERONSolTab 1 time each day, preferably in the evening at bedtime.
If you take too much REMERON or REMERONSolTab call your healthcare provider or poison control center at 1800-222-1222 right away or go to the nearest hospital emergency room.

How to take REMERONSolTab:

Keep REMERONSolTab in the blister pack until you are ready to take it. REMERONSolTab should be used immediately after opening the blister pack. Do not save it for future use.
Use dry hands to open the blister pack.
As soon as the blister pack is opened, remove REMERONSolTab right away and place it on the tongue.
Place REMERONSolTab on the tongue and allow it to melt (disintegrate). Do not chew, crush, or split REMERONSolTab.
REMERONSolTab will disintegrate rapidly on the tongue and can be swallowed with saliva. No water is needed for taking it.

What should I avoid while taking REMERON and REMERONSolTab?

Do not drive, operate heavy machinery, or do other dangerous activities until you know how REMERON and REMERONSolTab affects you. REMERON and REMERONSolTab can cause sleepiness or may affect your ability to make decisions, think clearly, or react quickly.
Avoid drinking alcohol during treatment with REMERON and REMERONSolTab.
Avoid taking medicines used to treat anxiety, insomnia, and seizures, called benzodiazepines, during treatment with REMERON and REMERONSolTab. Ask your healthcare provider if you are not sure if you take one of these medicines.

What are the possible side effects of REMERON and REMERONSolTab?

REMERON and REMERONSolTab may cause serious side effects, including:

In severe or more sudden cases, signs and symptoms include:

See, “What is the most important information I should know about REMERON and REMERONSolTab?”
Low white blood cell count. Tell your healthcare provider right away if you develop any signs or symptoms of a low white blood cell count, including:
- fever
- chills
- sore throat
- mouth or nose sores
- flu-like symptoms
- infections
Serotonin syndrome. A potentially life-threatening problem called serotonin syndrome can happen when you take REMERON or REMERONSolTab with certain other medicines. See, “Who should not take REMERON and REMERONSolTab?” Stop taking REMERON or REMERONSolTab and call your healthcare provider or go to the nearest hospital emergency room right away if you have any of the following signs and symptoms of serotonin syndrome:
- agitation
- seeing or hearing things that are not real (hallucinations)
- confusion
- coma
- fast heart beat
- blood pressure changes
- dizziness
- sweating
- flushing
- high body temperature (hyperthermia)
- tremors, stiff muscles, or muscle twitching
- loss of coordination
- seizures
- nausea, vomiting, diarrhea
Eye problems (angle-closure glaucoma). REMERON and REMERONSolTab may cause a certain type of eye problem called angle-closure glaucoma. Call your healthcare provider if you have eye pain, changes in your vision, or swelling or redness in or around the eye. Only some people are at risk for these problems. You may want to undergo an eye examination to see if you are at risk and receive preventative treatment if you are.
Heart rhythm problems.
Increased appetite and weight gain.
Sleepiness. See, “What should I avoid while taking REMERON and REMERONSolTab?”
Mania or hypomania (manic episodes) in people who have a history of bipolar disorder. Symptoms may include:
- greatly increased energy
- severe trouble sleeping
- racing thoughts
- reckless behavior
- unusually grand ideas
- excessive happiness or irritability
- talking more or faster than usual
Seizures (convulsions).
Increased fat levels (cholesterol and triglycerides) in your blood.
Low sodium levels in your blood (hyponatremia). Low sodium levels in your blood may be serious and may cause death. Elderly people may be at greater risk for this. Signs and Symptoms of low sodium levels in your blood may include:
- headache
- difficulty concentrating
- memory changes
- confusion
- weakness and unsteadiness on your feet which can lead to falls
- hallucinations (seeing or hearing things that are not real)
- fainting
- seizures
- coma
- respiratory arrest
- death
Changes in liver function tests.
Discontinuation syndrome. Suddenly stopping REMERON and REMERONSolTab may cause you to have serious side effects. Your healthcare provider may want to decrease your dose slowly. Symptoms may include:
- dizziness
- nausea and vomiting
- headache
- irritability and agitation
- problems sleeping
- abnormal dreams
- anxiety
- tiredness
- changes in your mood
- sweating
- confusion
- hypomania
- seizures
- electric shock sensation (paresthesia)
- ringing in your ears (tinnitus)
- shaking (tremor)

The most common side effects of REMERON and REMERONSolTab include:

sleepiness
increased appetite
weight gain
dizziness

These are not all the possible side effects of REMERON and REMERONSolTab.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

How should I store REMERON and REMERONSolTab?

Store REMERON and REMERONSolTab at room temperature between 68°F to 77°F (20°C to 25°C).
Keep REMERON and REMERONSolTab away from light and moisture.

Keep REMERON, REMERONSolTab, and all medicines out of the reach of children.

General information about the safe and effective use of REMERON and REMERONSolTab.

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use REMERON and REMERONSolTab for a condition for which it was not prescribed. Do not give REMERON and REMERONSolTab to other people, even if they have the same symptoms that you have. It may harm them. You can ask your healthcare provider or pharmacist for information about REMERON and REMERONSolTab that is written for healthcare professionals.

What are the ingredients in REMERON and REMERONSolTab?

Active ingredient: mirtazapine

Inactive ingredients:

REMERON Tablets: Colloidal silicon dioxide anhydrous, corn starch, ferric oxide (yellow), hydroxypropyl cellulose, hypromellose, polyethylene glycol 8000, lactose monohydrate, magnesium stearate, and titanium dioxide. The 30 mg tablets also contain ferric oxide (red).

REMERONSolTab: Aspartame, citric acid anhydrous fine granular, crospovidone, hypromellose, magnesium stearate, mannitol, granular mannitol 2080, microcrystalline cellulose, natural and artificial orange flavor, polymethacrylate (Eudragit E100), povidone, sodium bicarbonate, sugar spheres (made of starch and sucrose).

This Medication Guide has been approved by the U.S. Food and Drug Administration

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