Tenoxicam

Overview of the nonsteroidal anti-inflammatory drug Tenoxicam

Chemical structure of Tenoxicam

Tenoxicam is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and inflammation in conditions such as arthritis. It belongs to the oxicam class of NSAIDs, which are known for their long half-life and ability to provide sustained relief from symptoms.

Pharmacology

Tenoxicam works by inhibiting the cyclooxygenase (COX) enzymes, specifically COX-1 and COX-2. This inhibition reduces the synthesis of prostaglandins, which are compounds involved in the inflammatory process. By decreasing prostaglandin production, tenoxicam alleviates pain and reduces inflammation.

Mechanism of Action

The primary mechanism of action of tenoxicam is the inhibition of the COX enzymes. COX-1 is involved in maintaining the normal lining of the stomach, while COX-2 is primarily involved in inflammation. By inhibiting these enzymes, tenoxicam reduces inflammation and pain but may also lead to gastrointestinal side effects due to COX-1 inhibition.

Pharmacokinetics

Tenoxicam is well absorbed from the gastrointestinal tract, with peak plasma concentrations occurring within 2 hours after oral administration. It has a long half-life of approximately 72 hours, allowing for once-daily dosing. The drug is extensively bound to plasma proteins and is metabolized in the liver, with excretion primarily via the kidneys.

Clinical Uses

Tenoxicam is indicated for the treatment of various inflammatory and painful conditions, including:

• Rheumatoid arthritis
• Osteoarthritis
• Ankylosing spondylitis
• Acute musculoskeletal disorders

Side Effects

Common side effects of tenoxicam include gastrointestinal disturbances such as nausea, dyspepsia, and gastric ulceration. Due to its effect on COX-1, there is a risk of gastrointestinal bleeding, especially in long-term use. Other side effects may include headache, dizziness, and skin rash.

Contraindications

Tenoxicam is contraindicated in patients with:

• Known hypersensitivity to tenoxicam or other NSAIDs
• Active peptic ulcer disease
• Severe hepatic or renal impairment
• History of asthma attacks or allergic reactions after taking aspirin or other NSAIDs

Related pages

• Nonsteroidal anti-inflammatory drug
• Cyclooxygenase
• Prostaglandin
• Arthritis