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Aleve Dosage Calculator
Calculate Aleve (naproxen sodium) dosing by age, weight, and condition. Includes OTC max limits, dosing schedules, risk factors, and safety reference tables.
⚠️ Medical Disclaimer: This calculator is for educational reference only. Aleve (naproxen sodium) is an NSAID with risks of GI bleeding, cardiovascular events, and kidney injury. Always follow label directions or consult a healthcare provider.
kg
mg
Daily Dose vs OTC Max (660 mg)
440 mg
Recommended Initial Dose⧉
440 mg
First dose may be doubled
Maintenance Dose⧉
220 mg
Every 8–12 hours
Max OTC Daily Dose⧉
660 mg/day
10 days (OTC)
Your Daily Total⧉
440 mg
Within recommended range
Dose per kg⧉
6.29 mg/kg
Naproxen sodium per body weight
Risk Assessment⧉
Low
Color: Low
Tablets Per Day⧉
2.0
220 mg tablets
Time to Steady State⧉
~60 hours
Half-life: 12 hours
| Age Group | Initial Dose | Maintenance | Max Daily | Frequency |
|---|---|---|---|---|
| Children <12 | Rx only | Rx only | Rx only | Consult pediatrician |
| Teens 12–17 | 220 mg | 220 mg | 440 mg | Every 8–12 h |
| Adults 18–64 | 220–440 mg | 220 mg | 660 mg | Every 8–12 h |
| Elderly 65+ | 220 mg | 220 mg | 440 mg | Every 12 h preferred |
| Risk Factor | Concern Level | Precaution |
|---|---|---|
| GI bleeding / ulcers | High | Take with food; avoid with aspirin/warfarin |
| Cardiovascular events | Moderate–High | Lowest dose, shortest duration possible |
| Kidney impairment | Moderate | Avoid in CKD; stay hydrated |
| Drug interactions | Moderate | Check anticoagulants, SSRIs, lithium, ACE inhibitors |
| Allergic reactions | Low–Moderate | Avoid if aspirin-sensitive or has nasal polyps |
Planning notes, formulas, and examples
About the Aleve Dosage Calculator
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.
It shows 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.
When This Page Helps
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.
How to Use the Inputs
- Select your age group from the dropdown menu.
- Enter your body weight in kilograms for weight-adjusted calculations.
- Choose the Aleve formulation you are taking.
- Select the condition you are treating (pain, menstrual cramps, arthritis).
- Enter the amount in milligrams per dose you currently take.
- Enter how many doses you take per day.
- Review outputs including daily total, risk assessment, and reference tables.
Formula used
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 baseExample Calculation
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.
Tips & Best Practices
- Always take naproxen with food or a full glass of water to reduce stomach irritation.
- Do not crush or chew extended-release formulations.
- Wait at least 12 hours between the last naproxen dose and any aspirin dose if you take low-dose aspirin for heart protection.
- Monitor blood pressure regularly — NSAIDs can raise blood pressure.
- Stay well hydrated to protect kidney function while taking naproxen.
- If pain persists beyond 10 days, consult a healthcare provider rather than increasing the dose.
Naproxen vs Other NSAIDs
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.
GI Protection Strategies
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.
Prescription vs OTC Naproxen
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.
Sources & Methodology
Last updated:
Methodology
This worksheet uses OTC naproxen sodium label ranges and common adult dosing conventions to convert a selected dose into practical tablet or volume amounts. It is a label-reference aid, not treatment advice.
Sources
- FDA naproxen sodium OTC label (FDA)
- MedlinePlus: Naproxen (NIH)
- DailyMed: Naproxen sodium labeling (NLM)
Frequently Asked Questions
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 clinician. If symptoms continue past that point, the problem should be reassessed rather than extending self-treatment.
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.
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