Drug Name

Celebrex (Celecoxib)

Drug Uses

Celecoxib is used for the relief of pain, fever, swelling, and tenderness caused by osteoarthritis, rheumatoid arthritis, and ankylosing spondylitis. Celecoxib does not prevent the progression of either type of arthritis. It reduces only the symptoms and signs of arthritis. Celecoxib has been approved for patients with familial FAP who have not had their colons removed. Celebrex also is approved for the relief of acute pain and the pain of menstrual cramps (primary dysmenorrhea).

How Taken

The lowest effective dose should be used for each patient. For the management of osteoarthritis, the dose usually is 100 mg twice daily or 200 mg as a single dose. For rheumatoid arthritis, the dose usually is 100 or 200 mg twice daily. For acute pain or menstrual cramps, the dose is 400 mg as a single dose on the first day, followed by an additional 200 mg if needed, then 200mg twice daily as needed. For FAP, the recommended dose is 400 mg twice daily.

Drug Class and Mechanism

Celecoxib is a nonsteroidal anti-inflammatory drug (NSAID) that is used to treat arthritis, pain, menstrual cramps, and colonic polyps. Prostaglandins are chemicals that are important contributors to the inflammation of arthritis that causes the pain, fever, swelling and tenderness. Celecoxib blocks the enzyme that makes prostaglandins (cyclooxygenase 2), resulting in lower concentrations of prostaglandins. As a consequence, inflammation and its accompanying pain, fever, swelling and tenderness are reduced. Celecoxib differs from other NSAIDs in that it causes less inflammation and ulceration of the stomach and intestine (at least with short-term treatment) and does not interfere with the clotting of blood. NSAIDs have been found to prevent the formation and reduce the size of polyps in patients with the genetic disease, familial adenomatous polyposis (FAP). In FAP, patients develop large numbers of polyps in their colons, and the polyps invariably become malignant. The only cure of FAP requires removal of the entire colon. Celecoxib is approved as an adjunctive (secondary) treatment among patients with FAP. The cramping and pain during menstrual periods is due to prostaglandins, and blocking the production of prostaglandins with celecoxib reduces the cramps and pain.

Missed Dose

Take the missed dose as soon as you remember. If it is almost time for the next dose, skip the dose you missed and take only the next regularly scheduled dose as directed. Do not take a double dose of this medication unless your doctor directs otherwise.

Storage

Capsules should be stored at 25 degrees C (77 degrees F). It is okay for brief periods in temperatures between 15-30 degrees C (59-86 degrees F).

Warnings/Precautions

There are no restrictions on food, beverages, or activity while taking celecoxib unless otherwise directed by your doctor. Concomitant use of celecoxib with aspirin or other NSAIDs (e.g., ibuprofen, naproxen, etc.) may increase the occurrence of stomach and intestinal ulcers. Fluconazole (Diflucan) increases the concentration of celecoxib in the body by inhibiting the breakdown of celecoxib in the liver. Therefore, treatment with celecoxib should be initiated at the lowest recommended doses in patients who are taking fluconazole. Celecoxib increases the concentration of lithium (Eskalith) in the blood by 17%. Therefore, lithium therapy should be closely monitored during and after therapy with celecoxib. Persons, taking the anticoagulant (blood thinner) warfarin (Coumadin), should have their blood tested when initiating or changing celecoxib treatment, particularly in the first few days, for any changes in the effects of the anticoagulant. Persons, who drink more than 3 alcoholic beverages per day, may be at increased risk of developing stomach ulcers when taking NSAIDs, and this also may be true with celecoxib. Celecoxib has not been studied in pregnant women. In animal studies, doses that were twice the maximally recommended dose were harmful to the fetus. Celecoxib should only be used in pregnant women when the benefits outweigh the potential risk to the fetus. The use of celecoxib in nursing mothers has not been evaluated.

Possible Side Effects

Although stomach and intestinal ulcers occur with the use of celecoxib, their incidence is less than with other NSAIDs in short-term studies. Celecoxib does not interfere with the function of the blood platelets and, as a result, does not reduce clotting and lead to increased bleeding like other NSAIDs. The most common adverse effects are headache, abdominal pain, dyspepsia, diarrhea, nausea, flatulence and insomnia. Other side effects include fainting, kidney failure, heart failure, aggravation of hypertension, chest pain, ringing in the ears, deafness, stomach and intestinal ulcers, bleeding, blurred vision, anxiety, photosensitivity, weight gain, water retention, flu-like symptoms, drowsiness and weakness. Allergic reactions can occur with celecoxib. Individuals who have developed allergic reactions (rash, itching, difficulty breathing) from sulfonamides (e.g., Bactrim), aspirin or other NSAIDs may experience an allergic reaction to celecoxib and should not take celecoxib.

More Information

Notify your doctor immediately if you develop abdominal pain, tenderness, or discomfort; nausea; bloody vomit; bloody, black, or tarry stools; unexplained weight gain; swelling or water retention; fatigue or lethargy; a skin rash; itching; yellowing of the skin or eyes;"flu-like" symptoms; or unusual bruising or bleeding. These symptoms could be early signs of dangerous side effects. If you experience any of the following serious side effects, stop taking celecoxib and seek medical treatment or call your doctor immediately: an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives). Other, less serious side effects may be more likely to occur. Continue to take celecoxib and talk to your doctor if you experience flatulence or diarrhea; dizziness; headache; or insomnia. Side effects, other than those listed here, may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.