Naproxen 500 mg (Enteric‑Coated – “EC”) – a quick rundown
| Feature | Typical Details |
|---------|-----------------|
| Formulation | Enteric‑coated tablet (doesn’t dissolve in stomach acid, releases in the small intestine) – helps reduce stomach irritation. |
| Dose strength | 500 mg naproxen (usually the “naproxen sodium” salt). |
| Availability | In most countries, 500 mg is a prescription‑only strength. The usual over‑the‑counter (OTC) strength is 220 mg (e.g., Aleve in the U.S.). |
| Indications | Mild‑to‑moderate pain, osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, gout attacks, menstrual pain. |
| Typical adult dosing | • 1 tablet (500 mg) once or twice a day (i.e., 1–2 × 8–12 h apart).
• Maximum: 3 tablets (1,500 mg) per 24 h.
• Long‑term use: keep under 2 weeks unless a doctor says otherwise. |
| How to take | Swallow whole with a full glass of water with food or a snack. Do not crush or chew the enteric coating. |
| Why enteric‑coated? | Protects the stomach lining, lowers risk of dyspepsia, gastritis, or ulcers compared with uncoated forms, but it doesn’t eliminate GI risk entirely. |
| Key side‑effects | • Stomach upset, nausea, heartburn, abdominal pain
• GI bleeding or ulcers (especially with long‑term use)
• Renal impairment (dose‑related)
• Cardiovascular events (heart attack, stroke)
• Allergic reactions (rash, itching, swelling) |
| Contraindications / cautions | • History of GI ulcers, bleeding, or severe gastritis
• Kidney disease or significant renal impairment
• Heart failure, uncontrolled hypertension, recent MI or stroke
• Pregnancy (especially 3rd trimester)
• Severe liver disease
• Concurrent use of other NSAIDs or anticoagulants (warfarin, aspirin) |
| Drug interactions | • Anticoagulants (increases bleeding risk).
• ACE inhibitors / ARBs (may worsen kidney function).
• Diuretics (may increase kidney risk).
• SSRIs / SNRIs (increases GI bleeding risk).
• Methotrexate (increases toxicity). |
| What to watch for | • Persistent nausea, vomiting, black/tarry stools (GI bleeding).
• Swelling of ankles/legs, sudden shortness of breath (heart failure).
• Sudden pain in abdomen or chest (possible ulcer or cardiovascular event).
• Rash, itching, or swelling (possible allergy). |
| Alcohol | Avoid or limit alcohol; it can increase GI bleeding and liver stress. |
| Who should not use it | • Anyone with a known allergy to naproxen or other NSAIDs
• Patients on dual antiplatelet therapy (aspirin + clopidogrel) unless directed by a doctor. |
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Quick FAQ
Q: Is 500 mg really needed?
A: For most adults, a 220‑mg OTC dose is sufficient for pain or arthritis. 500 mg is usually prescribed when a stronger effect is needed or when the patient can tolerate the higher dose.
Q: Can I take it daily for a month?
A: Only if a healthcare professional has cleared it. Prolonged NSAID use increases GI, renal, and cardiovascular risk.
Q: Can I take it with my blood‑thinners?
A: Only under a doctor’s guidance. Naproxen can potentiate bleeding, especially with warfarin or aspirin.
Q: I’m on a kidney‑support medication. Is it safe?
A: NSAIDs are generally avoided in people with chronic kidney disease because they can further reduce kidney perfusion. Discuss alternatives with your provider.
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Bottom line: Naproxen 500 mg (enteric‑coated) is a potent NSAID for pain and inflammation, available by prescription in many places. Use it as directed, keep an eye on the usual NSAID side‑effects, and talk to a clinician before adding it to a