Naproxen: Uses, Side Effects, Dosage & Safety

Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) widely used to relieve pain, reduce fever, and ease inflammation. It is commonly prescribed or taken over the counter for conditions ranging from osteoarthritis and rheumatoid arthritis to acute gout flares, tendonitis, bursitis, and menstrual cramps.

While naproxen is effective for everyday aches and chronic inflammatory conditions, it is a potent medication that carries meaningful safety considerations. Like other NSAIDs, it can cause stomach irritation, increase blood pressure, and carry boxed warnings regarding the risk of serious cardiovascular events and gastrointestinal bleeding. Understanding how to use it properly, what dose to take, and when to speak with a healthcare provider ensures you manage pain without compromising your health.

Question	Quick Answer
What is naproxen?	A nonsteroidal anti-inflammatory drug (NSAID) for pain, swelling, and fever.
What is it used for?	Arthritis, gout attacks, bursitis, tendonitis, menstrual cramps, and acute aches.
Is it available OTC?	Yes, lower-strength naproxen sodium is sold over the counter; higher doses require a prescription.
Does it have serious risks?	Yes. It carries boxed warnings for gastrointestinal bleeding, ulcers, and cardiovascular events.
Can you take it with ibuprofen?	No. Combining multiple NSAIDs increases the risk of severe stomach and kidney injury.
Is it safe during pregnancy?	Avoid use, especially from 20 weeks onward, unless specifically directed by an obstetrician.

What Is Naproxen?

Naproxen belongs to a class of medications called nonsteroidal anti-inflammatory drugs (NSAIDs). Unlike acetaminophen, which primarily relieves pain and fever, NSAIDs also actively reduce swelling and inflammation in tissues.

Naproxen is available in two chemical forms:

• Naproxen base: Typically found in prescription formulations (such as brand-name Naprosyn or generic tablets).
• Naproxen sodium: Contains an added sodium molecule that allows the medication to dissolve and absorb into the bloodstream more quickly. This form is used in over-the-counter (OTC) products like Aleve, as well as higher-strength prescription versions like Anaprox DS. Because of the sodium salt component, 220 mg of naproxen sodium delivers approximately 200 mg of pure naproxen base.

Depending on the strength and the medical reason for treatment, naproxen is available both over the counter for minor aches and by prescription for chronic or severe musculoskeletal disorders.

What Is Naproxen Used For?

Healthcare providers recommend naproxen for a wide variety of acute and chronic conditions where pain is driven by underlying inflammation or tissue swelling.

Condition / Use	How Naproxen Helps
Osteoarthritis & Rheumatoid Arthritis	Relieves joint tenderness, reduces swelling, and decreases morning stiffness.
Ankylosing Spondylitis	Alleviates spinal inflammation and improves mobility.
Acute Gout	Controls intense joint inflammation and pain during sudden gout attacks.
Tendonitis & Bursitis	Calms inflamed connective tissue and surrounding fluid sacs in shoulders, knees, or elbows.
Menstrual Cramps (Dysmenorrhea)	Lowers uterine prostaglandin levels to lessen cramping severity.
Minor Aches & Fevers	Eases headaches, dental pain, backaches, and reduces elevated body temperature.

How Does Naproxen Work?

When body tissues become injured, stressed, or inflamed, they produce chemical messengers known as prostaglandins. Prostaglandins sensitize nerve endings to pain, cause blood vessels to widen, and trigger tissue swelling and fever.

Naproxen works by inhibiting cyclooxygenase enzymes—specifically COX-1 and COX-2. These enzymes are essential for the production of prostaglandins. By blocking these pathways, naproxen significantly lowers prostaglandin levels throughout the body. The result is reduced pain signaling, diminished swelling, and lower body temperature. Because COX-1 enzymes also help maintain the protective lining of the stomach and support kidney function, blocking them explains why stomach irritation and fluid retention can occur with regular use.

Naproxen Dosage

There is no single “universal dose” of naproxen. The appropriate amount depends on the formulation (free base vs. sodium), the specific condition being treated, your age, underlying kidney and liver health, and whether you are using an OTC product or a prescription.

Always take the lowest effective dose for the shortest duration necessary to achieve relief.

Naproxen 220 mg (Over the Counter)

OTC naproxen sodium tablets (such as Aleve or generic equivalents) are supplied as 220 mg tablets.

• Adults and children 12 years and older: Take 1 tablet every 8 to 12 hours while symptoms persist. For the first dose, you may take 2 tablets within the first hour if needed.
• OTC Maximum: Do not exceed 2 tablets in any 8- to 12-hour period, and do not exceed 3 tablets (660 mg) within a 24-hour period unless instructed by a physician.
• Duration: Do not take OTC naproxen for more than 10 consecutive days for pain, or more than 3 days for fever, without medical supervision.

Naproxen 250 mg: Uses

Naproxen 250 mg tablets (base form) are prescription-strength medications. They are commonly prescribed for mild-to-moderate musculoskeletal pain, early-stage arthritis, or acute soft-tissue injuries such as mild tendonitis or sprains. Clinicians frequently start patients on 250 mg taken orally twice daily to assess tolerance and symptom control.

Naproxen 500 mg: Uses

Naproxen 500 mg tablets (base form) or naproxen sodium 550 mg tablets are higher-dose prescription strengths. They are standardly used for:

• Moderate-to-severe osteoarthritis, rheumatoid arthritis, and ankylosing spondylitis (often dosed as 500 mg twice daily).
• Acute gout flares, where an initial loading dose of 750 mg or 825 mg is followed by 250 mg to 275 mg every 8 hours until the attack subsides.
• Severe menstrual cramps or post-surgical orthopedic pain.

How Often Can Naproxen Be Taken?

Because naproxen has an elimination half-life of approximately 12 to 17 hours, it stays active in the body longer than shorter-acting NSAIDs like ibuprofen. For this reason, prescription naproxen is typically dosed only twice daily (every 12 hours), while OTC naproxen sodium is taken every 8 to 12 hours.

Maximum Daily Dose: Why It Varies

For adults using prescription naproxen base, standard maintenance dosing generally peaks at 1,000 mg per day (such as 500 mg twice daily), though short-term management of acute conditions or severe arthritis flares may temporarily reach 1,250 mg to 1,500 mg daily under close medical supervision. Exceeding these thresholds dramatically increases the risk of stomach ulcers, internal bleeding, and sudden kidney impairment without providing additional pain relief.

Common Naproxen Side Effects

Most people tolerate short courses of naproxen well, but mild side effects can happen, particularly in the gastrointestinal tract:

• Indigestion, heartburn, and sour stomach
• Mild nausea or stomach upset
• Headache
• Dizziness or lightheadedness
• Mild fluid retention or swollen ankles
• Ringing in the ears (tinnitus)

Taking naproxen with food, milk, or a full glass of water can significantly reduce everyday stomach irritation.

Serious Side Effects of Naproxen

Naproxen, like all non-aspirin NSAIDs, carries FDA boxed warnings highlighting serious risks that require immediate medical attention.

• Gastrointestinal Ulcers and Bleeding: Naproxen can cause stomach or intestinal inflammation, ulcers, and bleeding or perforation. These complications can occur without warning at any time during treatment and can be fatal. The risk is substantially higher in older adults, individuals with a history of peptic ulcer disease, and those taking blood thinners or oral corticosteroids.
• Cardiovascular Risks: Clinical studies indicate that non-aspirin NSAIDs increase the risk of serious cardiovascular thrombotic events, including myocardial infarction (heart attack) and stroke. This risk can appear within the first few weeks of starting treatment and grows larger with higher doses and longer durations of use.
• Kidney Damage (Nephrotoxicity): Prostaglandins help maintain proper blood flow through the kidneys. Inhibiting them can lead to acute kidney injury, fluid retention, worsening of congestive heart failure, and hyperkalemia (high blood potassium levels).
• Liver Toxicity: Elevated liver enzymes can occur, and severe liver injury, while rare, has been reported.
• Severe Skin Reactions: Potentially life-threatening cutaneous reactions, such as Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN), can begin with flu-like symptoms followed by a painful red or purplish rash that spreads and blisters.

Naproxen Safety Precautions

Before taking naproxen, review your overall health profile. Consult a doctor or pharmacist prior to use if you have any of the following:

• Chronic kidney disease or diminished renal function
• Liver cirrhosis or active hepatic disease
• High blood pressure, heart disease, or a history of heart failure
• A personal history of stomach ulcers, GERD, or intestinal bleeding
• Asthma, especially if accompanied by nasal polyps or a sensitivity to aspirin
• Dehydration or volume depletion from severe illness
• Bleeding disorders or low platelet counts

Naproxen Drug Interactions

Naproxen interacts with numerous prescription and non-prescription medications. Combining them can reduce therapeutic effectiveness or magnify toxicity:

• Other NSAIDs (Ibuprofen, Meloxicam, Celecoxib): Increases the incidence of gastrointestinal damage and kidney strain without added pain relief.
• Aspirin: Naproxen can interfere with the antiplatelet protective effect of low-dose aspirin used for cardiovascular prevention, while simultaneously multiplying the danger of stomach bleeding.
• Anticoagulants and Antiplatelets (Warfarin, Apixaban, Clopidogrel): Significantly raises the probability of serious, potentially uncontrollable hemorrhage.
• Oral Corticosteroids (Prednisone): Synergistically magnifies the hazard of stomach ulceration and upper gastrointestinal bleeding.
• SSRIs and SNRIs (Sertraline, Duloxetine): These antidepressants impair platelet aggregation; using them alongside naproxen increases bleeding risks.
• Blood Pressure Medications (ACE Inhibitors, ARBs, Diuretics): Naproxen can blunt the antihypertensive effects of these drugs and heighten the risk of severe acute renal failure.
• Lithium: Naproxen reduces renal clearance of lithium, quickly pushing blood levels into dangerous, toxic ranges.
• Methotrexate: Naproxen can reduce the elimination of methotrexate, increasing the likelihood of bone marrow toxicity and other adverse reactions.
• Digoxin: NSAIDs can decrease kidney filtration, elevating serum digoxin concentrations.

Can You Take Naproxen With Ibuprofen?

No. You should not take naproxen and ibuprofen at the same time. Both drugs belong to the same NSAID class and work through the identical mechanism of COX enzyme inhibition.

Taking them together does not double your pain relief; instead, it saturates the pathway, placing immense stress on your kidneys and severely elevating the likelihood of stomach ulceration, gastritis, and internal bleeding. If a single NSAID does not adequately control your symptoms, talk with your healthcare provider about alternate pain-relief strategies rather than stacking two NSAIDs.

Naproxen and Pregnancy

The U.S. Food and Drug Administration (FDA) advises against taking naproxen and other NSAIDs at 20 weeks of pregnancy or later unless specifically instructed by an obstetrician.

Taking NSAIDs at or beyond 20 weeks can cause rare but severe kidney problems in the unborn baby, leading to oligohydramnios (dangerously low levels of amniotic fluid) and potential complications with fetal lung and joint development.

Later in pregnancy (starting around 30 weeks), NSAIDs must be avoided completely because they can cause premature closure of the fetal ductus arteriosus—a vital blood vessel in the baby’s heart—and may lead to persistent pulmonary hypertension in the newborn, prolonged labor, or maternal bleeding complications. If you are pregnant or planning to become pregnant, consult your prenatal provider before taking any pain medication.

Who Should Avoid or Discuss Naproxen With a Doctor?

You should not take naproxen if you have experienced asthma attacks, hives, or severe allergic-type reactions after taking aspirin or other NSAIDs. It is also contraindicated for the treatment of perioperative pain in the setting of coronary artery bypass graft (CABG) surgery.

Discuss naproxen with a doctor before using it if you:

• Are 65 years of age or older
• Have an active or previous peptic ulcer
• Have diagnosed hypertension, heart failure, or established cardiovascular disease
• Have impaired kidney or liver function
• Take routine prescription medications for blood pressure, depression, or blood clotting

How to Take Naproxen Safely

To minimize the likelihood of adverse events and get the most benefit from naproxen:

• Follow the package or prescription label strictly: Never exceed the stated single dose or 24-hour maximum.
• Use the lowest dose for the shortest time: Stop taking the medication as soon as pain is manageable.
• Take with food or liquids: Administering your dose alongside meals, milk, or a full 8-ounce glass of water reduces gastric discomfort.
• Do not lie down immediately: Avoid lying flat for at least 10 to 15 minutes after swallowing a tablet to ensure it passes smoothly into the stomach and does not irritate the esophagus.
• Avoid alcohol: Drinking alcohol while taking naproxen substantially elevates the likelihood of stomach bleeding and mucosal damage.
• Check multi-symptom cold remedies: Many over-the-counter combination medications for sinus congestion, coughs, or sleep contain hidden NSAIDs (like ibuprofen or naproxen). Read all labels carefully to avoid accidental double-dosing.
• Do not double missed doses: If you take naproxen on a schedule and miss a dose, take it as soon as you remember, unless it is close to the next scheduled dose. Never take two doses at once.

When Should You Seek Emergency Help?

Stop taking naproxen immediately and seek emergency medical evaluation if you develop any of the following warning signs:

• Signs of a heart attack or stroke: Chest pain or pressure, shortness of breath, pain spreading into the jaw, neck, shoulder, or arm, sudden numbness or weakness on one side of the body, or slurred speech.
• Signs of internal bleeding: Vomiting blood or material that looks like dark coffee grounds; black, bloody, or tarry bowel movements; or persistent, sharp, burning stomach pain.
• Severe allergic reactions (Anaphylaxis): Swelling of the lips, tongue, face, or throat; sudden difficulty swallowing or breathing; or severe hives.
• Signs of severe skin reaction: High fever with a spreading red or purple skin rash accompanied by blistering or peeling of the skin or mucous membranes.
• Signs of acute kidney dysfunction: A sudden, noticeable drop in urine output, painful urination, or unexplained rapid swelling in your feet, ankles, or lower legs.

Frequently Asked Questions

What is naproxen used for?

Naproxen is used to relieve mild-to-moderate pain, lower fevers, and reduce inflammation. It is commonly taken for osteoarthritis, rheumatoid arthritis, acute gout, bursitis, tendonitis, backaches, headaches, and primary menstrual cramps.

Is naproxen a strong painkiller?

Naproxen is a strong, non-opioid anti-inflammatory pain reliever. It is more effective at addressing inflammation-driven pain than acetaminophen, and because it stays active in the body longer than ibuprofen, it provides sustained 8- to 12-hour relief per dose.

How much naproxen can you take in a day?

For over-the-counter naproxen sodium, the maximum daily limit is 660 mg (3 caplets of 220 mg each) in 24 hours. For prescription naproxen base, standard adult doses typically do not exceed 1,000 mg to 1,250 mg daily, divided into two doses, unless a clinician specifically prescribes an alternate regimen.

What is naproxen 500 mg used for?

Naproxen 500 mg is a prescription-strength tablet used primarily to treat chronic inflammatory joint diseases like rheumatoid arthritis, osteoarthritis, and ankylosing spondylitis. It is also prescribed for acute gout attacks, severe menstrual pain, and acute tendonitis.

What is naproxen 250 mg used for?

Prescription naproxen 250 mg is commonly used for mild-to-moderate musculoskeletal pain, soft-tissue strains, sprains, and early-stage joint discomfort where lower-dose prescription therapy is sufficient to control symptoms.

What are the most common side effects of naproxen?

The most frequent side effects are gastrointestinal, including heartburn, indigestion, nausea, and mild abdominal discomfort. Other common reactions include headaches, dizziness, drowsiness, and slight fluid retention.

Can you take naproxen with ibuprofen?

No. You should not combine naproxen with ibuprofen or any other NSAID. Taking multiple NSAIDs at once does not improve pain relief and substantially elevates the risk of stomach ulcers, internal bleeding, and acute kidney injury.

Can naproxen cause stomach bleeding?

Yes. Naproxen inhibits the COX-1 enzyme, which normally produces protective prostaglandins in the stomach lining. Without these prostaglandins, the stomach becomes vulnerable to acid damage, potentially resulting in erosive gastritis, peptic ulcers, and gastrointestinal bleeding.

Can you take naproxen during pregnancy?

Avoid naproxen during pregnancy, especially starting at 20 weeks, unless explicitly guided by your obstetrician. NSAID use during this period can cause low amniotic fluid and fetal kidney issues. From 30 weeks onward, it is contraindicated due to the risk of premature closure of a major heart vessel in the developing fetus.

Can naproxen be taken every day?

Over-the-counter naproxen should not be taken for more than 10 consecutive days for pain without speaking to a doctor. While individuals with chronic conditions like rheumatoid arthritis or osteoarthritis may take prescription naproxen daily, they do so under clinical supervision with routine monitoring of blood pressure, kidney function, and liver health.

What is naproxen + domperidone used for?

Naproxen combined with domperidone is a specific prescription combination product available in certain countries outside the United States. It is primarily formulated for acute migraine attacks; the naproxen relieves severe vascular headache pain, while domperidone (an antiemetic and prokinetic agent) prevents migraine-related nausea and speeds gastric emptying to enhance naproxen absorption. It is not an ordinary over-the-counter pain reliever and should only be used under direct medical supervision where approved.