Momendol (Naproxen Sodium)

Naproxen Sodium is an NSAID that manages pain and inflammation across several common conditions.

• Mild to moderate pain: provides analgesia for headaches, dental pain, musculoskeletal aches.
• Osteoarthritis: reduces joint inflammation and improves functional mobility.
• Rheumatoid arthritis: alleviates inflammatory joint pain and swelling.
• Dysmenorrhea: eases menstrual cramps and associated discomfort.
• Fever: lowers elevated body temperature in acute febrile episodes.

• Naproxen sodium reversibly inhibits cyclooxygenase‑1 (COX‑1) and cyclooxygenase‑2 (COX‑2) enzymes, decreasing the conversion of arachidonic acid to prostaglandins. By lowering prostaglandin synthesis, it diminishes peripheral sensitization of nociceptors, reduces inflammatory exudate formation, and lowers the hypothalamic set‑point for temperature regulation, resulting in analgesic, anti‑inflammatory, and antipyretic effects.

Adverse reactions may range from mild gastrointestinal discomfort to serious systemic events.

Common Side Effects

• Nausea or upset stomach
• Headache
• Dizziness
• Abdominal pain or dyspepsia
• Diarrhea
• Mild skin rash

Serious or Rare Side Effects

• Gastrointestinal ulceration or bleeding
• Cardiovascular thrombotic events (e.g., myocardial infarction, stroke)
• Acute renal failure or worsening of chronic kidney disease
• Severe skin reactions such as Stevens‑Johnson syndrome
• Hepatic injury with elevated transaminases
• Anaphylaxis or severe hypersensitivity reactions

Before initiating therapy, clinicians should evaluate individual risk factors and monitor patients regularly.

• Assess gastrointestinal risk: avoid in patients with active ulcer disease or a history of GI bleeding.
• Evaluate cardiovascular risk: use caution in patients with known heart disease or stroke history.
• Monitor renal function: adjust use in patients with impaired kidney function.
• Use the lowest effective dose for the shortest duration needed.
• Avoid in individuals with known hypersensitivity to naproxen or other NSAIDs.
• Store at ambient temperature: keep in the original container, protect from moisture and direct sunlight.

Naproxen sodium can alter the pharmacodynamics or pharmacokinetics of several co‑administered agents.

Major Interactions (Avoid)

• Warfarin or other anticoagulants: increased risk of serious bleeding.
• Concurrent use of other NSAIDs or aspirin: heightened gastrointestinal toxicity.
• Selective serotonin reuptake inhibitors (SSRIs): amplified bleeding tendency.
• Lithium: naproxen may raise lithium serum concentrations.
• Methotrexate (high‑dose): reduced clearance leading to toxicity.

Moderate Interactions (Monitor Closely)

• ACE inhibitors or ARBs: possible reduction in renal function.
• Diuretics: may exacerbate renal impairment.
• Antihypertensive agents: naproxen can attenuate blood‑pressure‑lowering effects.
• Oral hypoglycemics: potential alteration of glucose control.
• Corticosteroids: additive risk of gastrointestinal ulceration.