What is the recommended naproxen dosage for adults, including over‑the‑counter and prescription formulations?

Naproxen Dosing for Adults

For over-the-counter use, naproxen sodium 220 mg twice daily is the standard dose, while prescription formulations typically use naproxen 250-500 mg twice daily for chronic conditions like arthritis, or naproxen 500 mg initially followed by 250-500 mg every 6-12 hours for acute pain (maximum 1250 mg first day, then 1000 mg daily thereafter). 1

Over-the-Counter Formulations

Naproxen sodium (Aleve): 220 mg twice daily 2

• This lower OTC dose provides effective analgesia with good tolerability across all age groups 3
• The sodium salt formulation is more rapidly absorbed, making it preferable for acute pain conditions 1
• Onset of pain relief typically begins within 1 hour 1

Prescription Dosing by Indication

Chronic Inflammatory Conditions (Rheumatoid Arthritis, Osteoarthritis, Ankylosing Spondylitis)

Standard dosing: Naproxen 250 mg, 375 mg, or 500 mg twice daily 1

• Morning and evening doses do not need to be equal
• May be adjusted up or down based on clinical response
• For patients tolerating lower doses well, can increase to 1500 mg/day for up to 6 months when higher anti-inflammatory activity is required 1
• More frequent than twice-daily dosing is unnecessary given the 12-17 hour half-life 1

Acute Pain, Primary Dysmenorrhea, Tendonitis, and Bursitis

Initial dose: Naproxen 500 mg, followed by 500 mg every 12 hours OR 250 mg every 6-8 hours 1

• Maximum first day: 1250 mg total 1
• Maximum subsequent days: 1000 mg daily 1
• Naproxen sodium is specifically recommended for acute conditions due to faster absorption and onset 1

Acute Gout

Initial dose: 750 mg naproxen, followed by 250 mg every 8 hours until attack subsides 1

This higher loading dose addresses the severe inflammatory component of acute gout attacks.

Juvenile Arthritis

Dosing: Approximately 10 mg/kg/day in 2 divided doses (5 mg/kg twice daily) 1

• Naproxen oral suspension is recommended over tablets for accurate pediatric dosing 1

Special Population Considerations

Elderly Patients

Use the lowest effective dose 1

• Although total plasma naproxen concentration is unchanged in elderly patients, the unbound fraction increases (0.12-0.19% vs 0.05-0.075% in younger patients) 1
• This may increase adverse event rates at any given dose 1
• For OTC use in patients ≥65 years: naproxen sodium 440 mg/day (rather than 660 mg/day for younger adults) 3, 4
• Studies demonstrate equivalent efficacy with the lower dose in older patients 3

Renal Impairment

Naproxen is contraindicated in moderate to severe renal impairment (CrCl <30 mL/min) 1

• Naproxen and its metabolites are 95% renally excreted, creating risk for accumulation 1
• Dose adjustment may be needed in mild renal impairment, though specific guidance is not provided in the label 1

Hepatic Impairment

Lower doses should be considered, though specific pharmacokinetic data in hepatic insufficiency is lacking 1

Important Clinical Considerations

Cardiovascular Risk

All NSAIDs, including naproxen, carry cardiovascular risk 5. However, naproxen appears to have the most favorable cardiovascular profile among NSAIDs with a relative risk of 0.92 (95% CI 0.67-1.26) for vascular events versus placebo 5. This contrasts with diclofenac (RR 1.63) and ibuprofen (RR 1.51) 5.

Gastrointestinal Protection

For patients at risk of GI bleeding:

• Combine naproxen with a proton pump inhibitor 2
• Risk increases with age: 1 in 2,100 for patients <45 years vs 1 in 110 for patients >75 years annually 2

Formulation Differences

Critical caveat: Different naproxen formulations are not bioequivalent 1. When switching between naproxen tablets, suspension, delayed-release tablets, and naproxen sodium tablets, consider the pharmacokinetic differences that affect onset of action 1.

Efficacy Data

Research demonstrates naproxen's effectiveness:

• NNT of 2.7 for at least 50% pain relief over 4-6 hours with naproxen 500/550 mg versus placebo 6
• Median time to rescue medication: 8.9 hours with naproxen 500/550 mg versus 2.0 hours with placebo 6
• In head-to-head comparison, naproxen sodium 440 mg was superior to hydrocodone/acetaminophen 10/650 mg for post-surgical dental pain 7

The pharmacokinetics of naproxen are linear, meaning plasma levels increase proportionately with dose, and efficacy data from lower doses can be extrapolated to higher OTC doses 8.