Medical Information Only: This medication is not sold on this site. The information provided is for reference purposes only. Please consult your local physician or pharmacist for treatment.

Feldene Drug Description: Detailed Datasheet

Medically reviewed by Min Clinic Staff | Updated: January 2026
  • Generic Name: piroxicam
  • Brand Name: Feldene

side effects drug center feldene (piroxicam) drug

 

PROFESSIONAL

CONSUMER

SIDE EFFECTS

Drug Description

What is Feldene and how is it used?

Piroxicam is a prescription medicine used to treat the pain or inflammation of rheumatoid arthritis (including juvenile arthritis) or osteoartritis. Piroxicam may be used alone or with other medications.

Piroxicam is a nonsteroidal anti-inflammatory drug (NSAID).

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

What are the possible side effects of Feldene?

Feldene may cause serious side effects including:

  • pounding in neck or ears,
  • drowsiness,
  • blurred vision,
  • swelling,
  • rapid weight gain,
  • shortness of breath,
  • loss of appetite,
  • stomach pain,
  • tiredness,
  • itching,
  • dark urine ,
  • clay colored stools,
  • yellowing of skin or eyes (jaundice),
  • bloody or tarry stools,
  • coughing up blood or vomit that looks like coffee grounds,
  • little or no urination,
  • swelling in your feet or ankles,
  • feeling light-headed,
  • cold hands or feet,
  • pale skin, and
  • severe headache,

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

The most common side effects of Feldene include:

  • abnormal liver function tests,
  • difficulty urinating,
  • upset stomach,
  • heartburn,
  • loss of appetite,
  • stomach pain,
  • nausea,
  • vomiting,
  • gas,
  • diarrhea ,
  • constipation,
  • dizziness,
  • headache,
  • itching or rash, and
  • ringing in the ears,

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 Feldene. 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.

WARNING

RISK OF SERIOUS CARDIOVASCULAR AND GASTROINTESTINAL EVENTS

Cardiovascular Thrombotic Events

  • Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use. [see WARNINGS AND PRECAUTIONS].
  • FELDENE is contraindicated in the setting of coronary artery bypass graft (CABG) surgery [see CONTRAINDICATIONS and WARNINGS AND PRECAUTIONS].

Gastrointestinal Bleeding, Ulceration, and Perforation

  • NSAIDs cause an increased risk of serious gastrointestinal (GI) adverse events including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. These events can occur at any time during use and without warning symptoms. Elderly patients and patients with a prior history of peptic ulcer disease and/or GI bleeding are at greater risk for serious GI events [see WARNINGS AND PRECAUTIONS].

 

DESCRIPTION

FELDENE (piroxicam) capsule is a nonsteroidal anti-inflammatory drug, available as maroon and blue #322 10 mg capsules and maroon #323 20 mg capsules for oral administration. The chemical name is 4-hydroxyl-2- methyl-N-2-pyridinyl-2H-1,2,-benzothiazine-3-carboxamide 1,1-dioxide. The molecular weight is 331.35. Its molecular formula is C15H13N3O4S, and it has the following chemical structure.

FELDENE (piroxicam) Structural Formula Illustration

Piroxicam occurs as a white crystalline solid, sparingly soluble in water, dilute acid, and most organic solvents. It is slightly soluble in alcohol and in aqueous solutions. It exhibits a weakly acidic 4-hydroxy proton (pKa 5.1) and a weakly basic pyridyl nitrogen (pKa 1.8).

The inactive ingredients in FELDENE include: Blue 1, Red 3, lactose, magnesium stearate, sodium lauryl sulfate, starch.

 

Indications & Dosage

INDICATIONS

FELDENE is indicated:

 

DOSAGE AND ADMINISTRATION

Carefully consider the potential benefits and risks of FELDENE and other treatment options before deciding to use FELDENE. Use the lowest effective dosage for the shortest duration consistent with individual patient treatment goals [see WARNINGS AND PRECAUTIONS].

After observing the response to initial therapy with FELDENE, the dose and frequency should be adjusted to suit an individual patient's needs.

For the relief of rheumatoid arthritis and osteoarthritis, the dosage is 20 mg given orally once per day. If desired, the daily dose may be divided. Because of the long half-life of FELDENE, steady-state blood levels are not reached for 7–12 days. Therefore, although the therapeutic effects of FELDENE are evident early in treatment, there is a progressive increase in response over several weeks and the effect of therapy should not be assessed for two weeks.

 

HOW SUPPLIED

Dosage Forms And Strengths

FELDENE (piroxicam) Capsules

10 mg maroon and blue #322
20 mg maroon #323

Storage And Handling

FELDENE® (piroxicam) 10 mg capsules are maroon and blue #322, supplied as:

NDC Number Size
0069-3220-66 bottles of 100

FELDENE® (piroxicam) 20 mg capsules are maroon #323, supplied as:

NDC Number Size
0069-3230-66 bottles of 100

Storage

Store at room temperature 20°C to 25°C (68°F to 77°F); excursions permitted between 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature].

Distributed by: Pfizer Labs, Division of Pfizer Inc., 235 East 42nd Street, New York, NY 10017. Revised: Apr 2017.

 

Side Effects

The following adverse reactions are discussed in greater detail in other sections of the labeling:

  • Cardiovascular Thrombotic Events [see WARNINGS AND PRECAUTIONS]
  • with longer use of NSAIDs

Do not take NSAIDs right before or after a heart surgery called a "coronary artery bypass graft (CABG)."

Avoid taking NSAIDs after a recent heart attack, unless your healthcare provider tells you to. You may have an increased risk of another heart attack if you take NSAIDs after a recent heart attack

  • Increased risk of bleeding, ulcers, and tears (perforation) of the esophagus (tube leading from the mouth to the stomach), stomach and intestines:
    • anytime during use
    • without warning symptoms
    • that may cause death

    The risk of getting an ulcer or bleeding increases with:

    • past history of stomach ulcers, or stomach or intestinal bleeding with use of NSAIDs
    • taking medicines called "corticosteroids", "anticoagulants", "SSRIs" or "SNRIs"
    • increasing doses of NSAIDs
    • longer use of NSAIDs
    • drinking alcohol
    • older age
    • poor health
    • advanced liver disease
    • bleeding problems

    NSAIDs should only be used:

    • exactly as prescribed
    • at the lowest dose possible for your treatment
    • for the shortest time needed
  • What are NSAIDs?

    NSAIDs are used to treat pain and redness, swelling, and heat (inflammation) from medical conditions such as different types of arthritis, menstrual cramps, and other types of short-term pain.

    Who should not take NSAIDs?

    Do not take NSAIDs:

    Before taking NSAIDS, tell your healthcare provider about all of your medical conditions, including if you:

    Tell your healthcare provider about all of the medicines you take, including prescription or overthe- counter medicines, vitamins or herbal supplements. NSAIDs and some other medicines can interact with each other and cause serious side effects. Do not start taking any new medicine without talking to your healthcare provider first.

    What are the possible side effects of NSAIDs?

    NSAIDs can cause serious side effects, including:

    See "What is the most important information I should know about medicines called Nonsteroidal Anti-inflammatory Drugs (NSAIDs)?

    Get emergency help right away if you get any of the following symptoms:

    • more tired or weaker than usual
    • your skin or eyes look yellow
    • vomit blood
    • there is blood in your bowel movement or it is black and sticky like tar
    • unusual weight gain
    • skin rash or blisters with fever
    • swelling of the arms, legs, hands and feet

    If you take too much of your NSAID, call your healthcare provider or get medical help right away.

    These are not all the possible side effects of NSAIDs. For more information, ask your healthcare provider or pharmacist about NSAIDs.

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

    Other information about NSAIDs

    • Aspirin is an NSAID but it does not increase the chance of a heart attack. Aspirin can cause bleeding in the brain, stomach, and intestines. Aspirin can also cause ulcers in the stomach and intestines.
    • Some NSAIDs are sold in lower doses without a prescription (over-the counter). Talk to your healthcare provider before using over-the-counter NSAIDs for more than 10 days.

    General information about the safe and effective use of NSAIDs

    Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use NSAIDs for a condition for which it was not prescribed. Do not give NSAIDs to other people, even if they have the same symptoms that you have. It may harm them.

    If you would like more information about NSAIDs, talk with your healthcare provider. You can ask your pharmacist or healthcare provider for information about NSAIDs that is written for health professionals.

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