Calculate Aleve (naproxen sodium) dosing by age, weight, and condition. Includes OTC max limits, dosing schedules, risk factors, and safety reference tables.
The Aleve Dosage Calculator helps determine appropriate naproxen sodium (Aleve) dosing based on age, body weight, condition being treated, and current usage. Naproxen sodium is a widely used nonsteroidal anti-inflammatory drug (NSAID) available over the counter for pain, fever, and inflammation.
Unlike ibuprofen which requires dosing every 4–6 hours, naproxen has a longer half-life (~12 hours) allowing twice-daily or even once-daily dosing. This makes it convenient for sustained pain relief from conditions like menstrual cramps, headaches, arthritis, and musculoskeletal injuries. However, the longer duration also means the drug accumulates more — making proper dosing critical.
This calculator provides OTC dosing guidelines, identifies when you are approaching or exceeding maximum recommended doses, and highlights important risk factors associated with NSAID use. It is intended for educational purposes and should not replace consultation with a healthcare professional, especially for elderly patients, those with kidney disease, or those on blood thinners. Check the example with realistic values before reporting.
Naproxen is one of the most commonly used OTC pain relievers, but its longer half-life means dosing errors can lead to accumulation and toxicity more easily than shorter-acting NSAIDs. This calculator helps ensure daily intake stays within safe limits, provides age-appropriate dosing, and highlights critical safety considerations.
Particularly valuable for arthritis sufferers who take naproxen regularly and need to track cumulative daily doses, and for elderly patients who need lower maximum doses.
Naproxen Sodium OTC Dosing: Initial: 220–440 mg (adults) Maintenance: 220 mg every 8–12 hours Max OTC: 660 mg/day (adults), 440 mg/day (elderly/teens) Dose per kg = Daily Total ÷ Body Weight Note: 220 mg naproxen sodium ≈ 200 mg naproxen base
Result: 440 mg/day total; within OTC maximum of 660 mg/day
A 70 kg adult taking 220 mg twice daily has a total daily intake of 440 mg naproxen sodium (6.3 mg/kg), which is within the 660 mg/day OTC limit. This equates to about 400 mg naproxen base.
Naproxen sodium stands out among OTC NSAIDs due to its 12-hour half-life, compared to 2–4 hours for ibuprofen and 4–6 hours for aspirin. This means fewer daily doses for sustained pain relief but also a longer washout period. Studies suggest naproxen may have a somewhat lower cardiovascular risk profile compared to other NSAIDs like diclofenac, though all NSAIDs carry cardiovascular warnings.
The most significant risk of regular naproxen use is gastrointestinal injury — from mild dyspepsia to serious bleeding ulcers. Risk factors include age over 65, history of ulcers, concomitant aspirin or anticoagulant use, and high-dose NSAID therapy. Protective strategies include taking the drug with food, using the lowest effective dose, and adding a proton pump inhibitor (PPI) for patients at elevated GI risk.
OTC Aleve contains 220 mg naproxen sodium per tablet, while prescription naproxen (Naprosyn, Anaprox) comes in higher strengths (250, 375, 500 mg naproxen base or equivalent sodium salt). Prescription dosing for conditions like rheumatoid arthritis can reach 1000–1500 mg/day under medical supervision — significantly higher than OTC limits. The calculator focuses on OTC dosing; prescription dosing requires direct physician management.
Adults 18–64 can take up to 660 mg/day (3 tablets of 220 mg) OTC. Teens 12–17 and elderly 65+ should not exceed 440 mg/day (2 tablets).
No. Combining NSAIDs significantly increases the risk of GI bleeding and kidney problems. Choose one NSAID at a time.
OTC naproxen should not be used for more than 10 consecutive days for pain or 3 days for fever unless directed by a doctor. Use this as a practical reminder before finalizing the result.
NSAIDs carry higher risks in elderly patients, including GI bleeding, kidney injury, and cardiovascular events. Use the lowest dose for the shortest duration and consult a physician.
Aleve OTC is approved for ages 12 and older. Children under 12 should only use naproxen under a doctor's prescription and supervision.
Yes. Taking naproxen with food or milk reduces the risk of stomach upset and GI side effects.