Naproxen 500 mg is not available over the counter in the United States. It is classified as a prescription-only drug by the FDA. The version you can buy without a prescription, sold under the brand name Aleve, comes in a lower strength of 220 mg per tablet. If you need the 500 mg dose, you’ll need to get it from a doctor.
OTC vs. Prescription Strengths
Naproxen is sold in two distinct tiers. Over the counter, you can buy naproxen sodium 220 mg tablets (Aleve and store-brand equivalents). With a prescription, the available strengths jump considerably: 250 mg, 375 mg, 500 mg, and controlled-release formulations up to 750 mg per tablet. There’s also a prescription version called naproxen sodium 550 mg (sold as Anaprox DS), which is the rough prescription equivalent of the 500 mg naproxen base tablet.
The reason these exist as separate products isn’t just about milligrams. Prescription naproxen is meant to be taken on a regular schedule, often twice daily, under medical supervision. OTC Aleve is intended for short-term, occasional use for things like headaches, minor aches, or menstrual cramps. The OTC label limits adults to no more than two or three tablets in 24 hours, capping you at about 440 to 660 mg per day. Prescription dosing can reach 1,000 to 1,500 mg per day depending on the condition.
Why 500 mg Requires a Prescription
At higher doses, naproxen carries greater risks that warrant medical oversight. Like all anti-inflammatory drugs in its class, naproxen can cause stomach ulcers, gastrointestinal bleeding, and cardiovascular problems, particularly with long-term use or at higher doses. These risks increase meaningfully as the daily dose goes up, which is exactly why the FDA restricts the stronger tablets to prescription-only status.
The 500 mg strength is typically prescribed for conditions that need sustained, higher-level anti-inflammatory control: rheumatoid arthritis, osteoarthritis, ankylosing spondylitis, acute gout attacks, tendinitis, bursitis, and severe menstrual pain. For acute gout, for example, starting doses can reach 1,000 to 1,500 mg on the first day. These are situations where the benefit of a stronger dose justifies the added risk, and where a doctor needs to monitor how your body is responding.
Can You Just Take More Aleve Instead?
Technically, two Aleve tablets give you 440 mg of naproxen sodium, which is in the ballpark of a 500 mg prescription dose. Some people reason that they can simply double up on OTC tablets to get prescription-level relief. This is a bad idea for a few reasons.
First, the OTC dosing limits exist specifically because taking more than the recommended amount over time raises your risk of stomach bleeding and kidney problems. Second, the conditions that call for 500 mg naproxen typically require weeks or months of consistent use, not the 10-day maximum printed on the Aleve box. Taking OTC naproxen at higher doses for extended periods without monitoring puts you at risk without the safety net of blood work or check-ins that come with a prescription.
How Prescription Naproxen Works Differently
Naproxen has a long half-life of about 15 hours, which is part of what makes it useful for chronic conditions. A single dose stays active in your system much longer than ibuprofen (which lasts roughly 4 to 6 hours). Prescription formulations take advantage of this. Controlled-release versions like Naprelan are designed to be taken just once a day, slowly releasing the drug to maintain steady levels in your blood throughout the day.
This extended action is why naproxen is often preferred over ibuprofen for ongoing inflammatory conditions. Fewer doses per day means more consistent pain and inflammation control, which matters when you’re managing something like arthritis that flares throughout the day and night.
Who Should Not Take Naproxen at Any Dose
Certain people should avoid naproxen entirely, whether OTC or prescription. You should not take it if you’ve ever had an allergic reaction to aspirin or any other anti-inflammatory drug, especially reactions involving hives, facial swelling, or breathing difficulty. People recovering from coronary artery bypass surgery are also specifically warned against it due to elevated heart risks.
Beyond those hard restrictions, naproxen requires caution if you have a history of stomach ulcers, kidney disease, heart disease, or high blood pressure. These are all conditions where the higher prescription doses pose the most concern, and exactly why a doctor’s involvement matters when moving beyond OTC strengths.
How to Get Naproxen 500 mg
If OTC Aleve isn’t providing enough relief, the path to 500 mg naproxen is straightforward: schedule a visit with your primary care provider. Explain what you’re treating and how the OTC dose is falling short. For many common conditions like moderate arthritis or recurring tendinitis, doctors prescribe naproxen 500 mg routinely. It’s one of the most widely prescribed anti-inflammatory drugs in the country, and appointments for this kind of request are typically brief.
With a prescription, naproxen 500 mg is also inexpensive. Generic versions are widely available, and a month’s supply often costs under $15 even without insurance. The barrier isn’t cost; it’s the prescription itself, which exists to make sure the higher dose is appropriate for your specific health profile.