Extina

What is Extina and how is it used?

Extina is a prescription medicine used to treat the symptoms of Seborrheic Dermatitis, Dandruff (Seborrhea), Tinea Versicolor, Tinea Corporis (Ringworm), Tinea Cruris (Jock Itch), and Tinea Pedis (Athlete’s Foot). Extina may be used alone or with other medications.

Extina belongs to a class of drugs called Antifungals, Topical.

It is not known if Extina is safe and effective in children younger than 12 years of age.

What are the possible side effects of Extina?

Extina may cause serious side effects including:

• hives,
• difficulty breathing,
• swelling of your face, lips, tongue, or throat,
• burning, stinging, or severe irritation after using the medicine,
• redness, pain, or oozing of treated skin, and
• shortness of breath

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

The most common side effects of Extina include:

• thinning hair,
• changes in the color or texture of your hair,
• dry skin, and
• mild itching

Tell the 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 Extina. 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.

DESCRIPTION

EXTINA® Foam contains 2% ketoconazole USP, an antifungal agent, in a thermolabile hydroethanolic foam for topical application.

The chemical name for ketoconazole is piperazine, 1-acetyl-4-[4-[[2-(2,4-dichlorophenyl) -2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methoxy]phenyl]-, cis- with the molecular formula C₂₆H₂₈Cl₂N₄O₄ and a molecular weight of 531.43. The following is the chemical structure:

EXTINA® Foam contains 20 mg ketoconazole per gram in a thermolabile hydroethanolic foam vehicle consisting of cetyl alcohol, citric acid, ethanol (denatured with tert-butyl alcohol and brucine sulfate) 58%, polysorbate 60, potassium citrate, propylene glycol, purified water, and stearyl alcohol pres­surized with a hydrocarbon (propane/butane) propellant.

INDICATIONS

EXTINA® (ketoconazole) Foam, 2% is indicated for the topical treatment of seborrheic dermatitis in immunocompetent patients 12 years of age and older. Safety and efficacy of EXTINA® Foam for treatment of fungal infections have not been established.

DOSAGE AND ADMINISTRATION

EXTINA® Foam should be applied to the affected area(s) twice daily for four weeks.

Hold the container upright, and dispense EXTINA® Foam into the cap of the can or other cool surface in an amount sufficient to cover the affected area(s). Dispensing directly onto hands is not recommended, as the foam will begin to melt immediately upon contact with warm skin. Pick up small amounts of EXTINA® Foam with the fingertips, and gently massage into the affected area(s) until the foam disappears. For hair-bearing areas, part the hair, so that EXTINA® Foam may be applied directly to the skin (rather than on the hair).

Avoid contact with the eyes and other mucous membranes. EXTINA® Foam is not for ophthalmic, oral or intravaginal use.

HOW SUPPLIED

Dosage Forms And Strengths

EXTINA® Foam contains 2% ketoconazole in a thermolabile hydroetha­nolic foam, and is provided in 50 g and 100 g aluminum containers.

Storage And Handling

EXTINA® Foam, 2% is supplied in 50 g (NDC 40076-051-50) and 100 g (NDC 40076-051-00) aluminum containers.

Store at controlled room temperature 68°F to 77°F (20°C to 25°C). Do not store under refrigerated conditions. Do not expose containers to heat, and/or store at temperatures above 120°F (49°C). Do not store in direct sunlight.

Contents are flammable.

Contents under pressure. Do not puncture and/or incinerate container.

Keep out of reach of children.

Manufactured for: Prestium Pharma, Inc.Newtown, PA 18940By DPT Laboratories, Ltd., San Antonio, TX 78215. Revised: June 2013

SIDE EFFECTS

Adverse Reactions In Clinical Trials

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 adverse reaction information from clinical trials does, however, provide a basis for identifying the adverse reactions that appear to be related to drug use and for approximating rates.

The safety data presented in Table 1 (below) reflect exposure to EXTINA® Foam in 672 subjects, 12 years and older with seborrheic dermatitis. Subjects applied EXTINA® Foam or vehicle foam twice daily for 4 weeks to affected areas on the face, scalp, and/or chest. Adverse reactions occurring in > 1% of subjects are presented in Table 1.

Table 1: Adverse Reactions Reported by > 1% Subjects in Clinical Trials

Adverse Reactions	EXTINA® Foam N = 672 n (%)	Vehicle Foam N = 497 n (%)
Subjects with an Adverse Reaction	188 (28%)	122 (25%)
Application site burning	67 (10%)	49 (10%)
Application site reaction	41 (6%)	24 (5%)

Application site reactions that were reported in < 1% of subjects were dry­ness, erythema, irritation, paresthesia, pruritus, rash and warmth.

Dermal Safety Studies

In a photoallergenicity study, 9 of 53 subjects (17%) had reactions dur­ing the challenge period at both the irradiated and non-irradiated sites treated with EXTINA® Foam. EXTINA® Foam may cause contact sensitization.

DRUG INTERACTIONS

No information provided.

WARNINGS

Included as part of the PRECAUTIONS section.

PRECAUTIONS

Contact Sensitization

EXTINA® Foam may result in contact sensitization, including photoal­lergenicity. [See ADVERSE REACTIONS]

Flammable Contents

The contents of EXTINA® Foam include alcohol and propane/butane, which are flammable. Avoid fire, flame and/or smoking during and immediately following application. Do not puncture and/or incinerate the containers. Do not expose containers to heat and/or store at temperatures above 120°F (49°C).

Systemic Effects

Hepatitis has been seen with orally administered ketoconazole (1:10,000 reported incidence). Lowered testosterone and ACTH–induced corticosteroid serum levels have been seen with high doses of orally administered ketocon­azole. These effects have not been seen with topical ketoconazole.

Patient Counseling Information

See FDA-approved patient labeling.

Instructions For Use

• Avoid fire, flame and/or smoking during and immediately following application.
• Do not apply EXTINA® Foam directly to hands. Dispense onto a cool surface, and apply to the affected areas using the fingertips.

Local Reactions

• EXTINA® Foam may cause skin irritation (application site burning and/or reactions)
• EXTINA® Foam may cause contact sensitization.
• As with any topical medication, patients should wash their hands after application.
• Inform a physician if the area of application shows signs of increased irritation and report any signs of adverse reactions.

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, And Impairment Of Fertility

Long-term animal studies have not been performed to evaluate the carcinogenic or photo-carcinogenic potential of EXTINA® Foam.

In oral carcinogenicity studies in mice (18-months) and rats (24-months) at dose levels of 5, 20 and 80 mg/kg/day ketoconazole was not carcinogenic. The high dose in these studies was approximately 2.4 to 4.8 times the expected topical dose in humans based on a mg/m² comparison. In a bacterial reverse mutation assay, ketoconazole did not express any muta­genic potential. In three in vivo assays (sister chromatid exchange in humans, dominant lethal and micronucleus tests in mice), ketoconazole did not exhibit any genotoxic potential.

At oral dose levels of 75 mg/kg/day (4.5 times the expected topical human dose in mg/m²), ketoconazole impaired reproductive performance and fertility when administered to male rats (increased abnormal sperm, decreased sperm mobility and decreased pregnancy in mated females).

Use In Specific Populations

Pregnancy

Teratogenic Effects

Pregnancy Category C: Ketoconazole has been shown to be teratogenic (syndactylia and oligodactylia) in the rat when given orally in the diet at 80 mg/kg/day (4.8 times the maximum expected human topical dose based on a mg/m² comparison, assuming 100% absorption from 8 g of foam). However, these effects may be partly related to maternal toxicity, which was also observed at this dose level. [See Pharmacokinetics]

No reproductive studies in animals have been performed with EXTINA® Foam. There are no adequate and well-controlled studies of EXTINA® Foam in pregnant women.

EXTINA® Foam should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Nursing Mothers

It is not known whether EXTINA® Foam administered topically could result in sufficient systemic absorption to produce detectable quantities in breast milk. Because many drugs are excreted in human milk, caution should be exercised when EXTINA® Foam is administered to women who are breast­feeding.

Pediatric Use

The safety and effectiveness of EXTINA® Foam in pediatric patients less than 12 years of age have not been established.

Of the 672 subjects treated with EXTINA® Foam in the clinical trials, 44 (7%) were from 12 to 17 years of age. [See Clinical Studies]

Geriatric Use

Of the 672 subjects treated with EXTINA® Foam in the clinical trials, 107 (16%) were 65 years and over.

OVERDOSE

No information provided.

CONTRAINDICATIONS

None

CLINICAL PHARMACOLOGY

Mechanism Of Action

The mechanism of action of ketoconazole in the treatment of seborrheic dermatitis is not known.

Pharmacodynamics

The pharmacodynamics of EXTINA® Foam has not been established.

Pharmacokinetics

In a bioavailability study, 12 subjects with moderate to severe seborrheic dermatitis applied 3 g of EXTINA® Foam twice daily for 4 weeks. Circulat­ing plasma levels of ketoconazole were < 6 ng/mL for a majority of subjects (75%), with a maximum level of 11 ng/mL observed in one subject.

Microbiology

Ketoconazole is an antifungal agent which inhibits the in vitro synthesis of ergosterol, a key sterol in the cell membrane of Malassezia furfur. The clini­cal significance of antifungal activity in the treatment of seborrheic dermatitis is not known.

Clinical Studies

The safety and efficacy of EXTINA® Foam were evaluated in a random­ized, double-blind, vehicle-controlled study in subjects 12 years and older with mild to severe seborrheic dermatitis. In the study, 427 subjects received EXTINA® Foam and 420 subjects received vehicle foam. Subjects applied EXTINA® Foam or vehicle foam twice daily for 4 weeks to affected areas on the face, scalp, and/or chest. The overall disease severity in terms of erythema, scaling, and induration was assessed at Baseline and week 4 on a 5-point Investigator's Static Global Assessment (ISGA) scale.

Treatment success was defined as achieving a Week 4 (end of treat­ment) ISGA score of 0 (clear) or 1 (majority of lesions have individual scores for scaling, erythema, and induration that averages 1 [minimal or faint]) and at least two grades of improvement from baseline. The results are presented in Table 2. The database was not large enough to assess whether there were differences in effects in age, gender, or race subgroups.

Table 2: Efficacy Results

Number of Subjects	EXTINA® Foam N = 427 n (%)	Vehicle Foam N = 420 n (%)
Subjects Achieving Treatment Success	239 (56%)	176 (42%)

PATIENT INFORMATION

EXTINA®
(ex-TEEN-ah)
(ketoconazole, 2%) Foam

IMPORTANT: For skin use only. Do not use in the eyes, mouth or vagina.

Read the Patient Information that comes with EXTINA® Foam before you start using it and each time you get a refill. There may be new information. This leaflet does not take the place of talking with your doctor about your condition or treatment.

What is EXTINA® Foam?

EXTINA® Foam is used on the skin (topical) to treat a skin condition called seborrheic dermatitis in patients 12 years and older. Seborrheic dermatitis can cause areas of flaky skin (scales) on the scalp, face, ears, chest or upper back.

EXTINA® Foam has not been studied in children less than 12 years old.

What should I tell my doctor before using EXTINA® Foam?

For female patients, tell your doctor if you:

• are pregnant or become pregnant. It is not known if EXTINA® Foam can harm a fetus (unborn baby).
• breastfeeding. It is not known if EXTINA® Foam passes into breast milk.

How should I use EXTINA® Foam?

• Apply EXTINA® Foam exactly as prescribed. EXTINA® Foam is usually applied to the affected skin areas two times a day (once in the morning and once at night) for 4 weeks. Talk to your doctor if your skin does not improve after 4 weeks of treatment with EXTINA® Foam.
• Keep the EXTINA® Foam can away from and do not spray it near fire, open flame, or direct heat. EXTINA® Foam is flammable. Never throw the EXTINA® Foam can into a fire, even if the can is empty.

Instructions for applying EXTINA® Foam

1. Hold the can at an upright angle.

2. Push the button to spray EXTINA® Foam directly into the cap of the can or other cool surface. Spray only the amount of EXTINA® Foam that you will need to cover your affected skin.

Do not spray EXTINA® Foam directly onto your affected skin or your hands because the foam will begin to melt right away when it touches your skin.

3. If your fingers are warm, rinse them in cold water first. Be sure to dry them well before handling the EXTINA® Foam. If the EXTINA® Foam can seems warm or the foam seems runny, place the can under cool running water for a few minutes.

4. Using your fingertips, gently massage EXTINA® Foam into the affected areas until the foam disap­pears.

5. If you are treating skin areas with hair such as your scalp, move any hair away so that the foam can be applied to the affected skin.

6. Do not get EXTINA® Foam in your eyes, mouth or vagina. If any EXTINA® Foam gets in your eyes, mouth or vagina, rinse areas well with water.

7. Wash your hands well after applying EXTINA® Foam.

What are the possible side effects of EXTINA® Foam?

The most common side effects of EXTINA® Foam are reaction or burning on treated skin areas. Tell your doctor if you have any reaction on your treated skin such as redness, itching, or a rash.

These are not all the side effects of EXTINA® Foam. Ask your doctor or phar­macist for more information.

How should I store EXTINA® Foam?

• EXTINA® Foam is flammable.
• Do not spray EXTINA® Foam near fire or direct heat. Never throw the can into a fire, even if the can is empty.
• Store the can of EXTINA® Foam at room temperature, 68° to 77°F (20°-25°C). Do not place the EXTINA® Foam can in the refrigerator or freezer.
• Keep the EXTINA® Foam can away from all sources of fire and heat. Do not leave the EXTINA® Foam can in direct sunlight.
• Do not smoke while holding the EXTINA® Foam can or while spray­ing or applying the foam.
• Do not pierce or burn the EXTINA® Foam can.
• Keep EXTINA® Foam and all medicines out of the reach of children.

General information about EXTINA® Foam

Medicines are sometimes prescribed for conditions that are not mentioned in Patient Information leaflets. Do not use EXTINA® Foam for any other condition for which it was not prescribed. Do not give EXTINA® Foam to other people, even if they have the same condition that you have. It may harm them.

This leaflet summarizes the most important information about EXTINA® Foam. If you would like more information, talk with your doctor. You can ask your doctor or pharmacist for information about EXTINA® Foam that is written for health professionals.

If you have questions about EXTINA® Foam you can also call: 1-866-897-5002 (Prestium). (this is a toll-free number).

What are the ingredients in EXTINA® Foam?

Active ingredients: ketoconazole

Inactive Ingredients: cetyl alcohol, citric acid, ethanol (denatured with tert-butyl alcohol and brucine sulfate) 58%, polysorbate 60, potassium citrate, propylene glycol, purified water, and stearyl alcohol pressurized with a hydrocarbon (propane/butane) propellant.

This Patient Information leaflet has been approved by the U.S. Food and Drug Administration.