Celecoxib Drug Profile

What is Celecoxib?

Celecoxib is a prescription nonsteroidal anti-inflammatory drug (NSAID) that belongs to a specific subclass called COX-2 selective inhibitors. It is primarily used to treat pain, inflammation, and stiffness associated with arthritis and other inflammatory conditions. Unlike traditional NSAIDs, celecoxib was designed to reduce gastrointestinal side effects while maintaining anti-inflammatory effectiveness.

Uses

Celecoxib is FDA-approved for several conditions:

• Osteoarthritis: Reduces joint pain and stiffness in the most common form of arthritis
• Rheumatoid arthritis: Helps manage inflammation and pain in this autoimmune condition
• Ankylosing spondylitis: Treats inflammation of the spine and large joints
• Acute pain: Provides short-term relief for various types of pain conditions
• Primary dysmenorrhea: Alleviates menstrual pain and cramping

How it works

Celecoxib works by selectively blocking the COX-2 enzyme, which is responsible for producing prostaglandins that cause inflammation, pain, and fever. Unlike traditional NSAIDs that block both COX-1 and COX-2 enzymes, celecoxib primarily targets COX-2, theoretically sparing the COX-1 enzyme that helps protect the stomach lining. This selective action was designed to reduce the risk of stomach ulcers and bleeding commonly associated with other NSAIDs.

Side effects

Common side effects include:

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• Stomach pain or upset
• Diarrhea
• Headache
• Dizziness
• Cold or flu-like symptoms
• Swelling in hands or feet
• Gas or bloating
• Nausea

Serious side effects requiring immediate medical attention:

• Heart attack or stroke symptoms
• Severe allergic reactions including skin rash or difficulty breathing
• Signs of liver problems such as yellowing of skin or eyes
• Kidney problems including decreased urination or swelling
• Severe stomach bleeding or ulcers

Warnings and precautions

• Cardiovascular risk: Celecoxib may increase the risk of heart attack and stroke, especially with long-term use or in people with existing heart disease
• Gastrointestinal bleeding: Despite being COX-2 selective, celecoxib can still cause serious stomach and intestinal bleeding, particularly in elderly patients
• Pregnancy considerations: Should be avoided during the third trimester as it may cause harm to the unborn baby and complications during delivery
• Kidney and liver function: Regular monitoring may be needed in patients with kidney or liver disease, as celecoxib can worsen these conditions
• Allergic reactions: Patients allergic to sulfonamides, aspirin, or other NSAIDs should use with extreme caution

Interactions

• Warfarin and blood thinners: Increases bleeding risk when combined with anticoagulant medications
• ACE inhibitors and ARBs: May reduce the effectiveness of these blood pressure medications and increase kidney problems
• Lithium: Celecoxib can increase lithium levels in the blood, potentially causing toxicity
• Methotrexate: May increase methotrexate toxicity by reducing its elimination from the body
• Fluconazole: This antifungal medication can significantly increase celecoxib levels
• Aspirin: Combining with low-dose aspirin may increase gastrointestinal bleeding risk
• Diuretics: May reduce the effectiveness of water pills and increase kidney problems
• Other NSAIDs: Should not be used together due to increased risk of side effects

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Dosage

Typical adult dosages vary by condition:

• Osteoarthritis: 200 mg once daily or 100 mg twice daily
• Rheumatoid arthritis: 100-200 mg twice daily
• Ankylosing spondylitis: 200 mg once daily or 100 mg twice daily
• Acute pain and menstrual cramps: 400 mg initially, followed by 200 mg as needed

The lowest effective dose should be used for the shortest duration necessary. Maximum daily dose should not exceed 400 mg. Dosage adjustments may be necessary for patients with liver impairment. Always consult your healthcare provider to determine the appropriate dosage for your specific condition and medical history.

Sources: FDA DailyMed drug labels (public domain), BNF, WHO Essential Medicines List. This article is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before starting or stopping any medication.

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