Aleve vs Tylenol: Naproxen vs Acetaminophen for Pain and Fever

Quick Answer: Aleve is naproxen sodium 220 mg, a nonsteroidal anti-inflammatory drug (NSAID). Adults take 1 tablet every 8 to 12 hours (2 allowed in the first hour of the first dose), no more than 3 in 24 hours. Its label carries stomach bleeding and heart attack and stroke warnings. Tylenol Extra Strength is acetaminophen 500 mg: 2 caplets every 6 hours, no more than 6 in 24 hours, with a liver warning about exceeding 4,000 mg a day, combining with other acetaminophen products, or 3+ drinks daily. Neither is a winner for everyone: the right choice depends on your stomach, heart, kidney and liver health and other medicines.

Aleve vs Tylenol at a Glance

Feature	Aleve (naproxen sodium 220 mg)	Tylenol Extra Strength (acetaminophen 500 mg)
Drug class	NSAID	Analgesic/antipyretic (not an NSAID)
Reduces inflammation	Yes	No meaningful anti-inflammatory effect
Adult dose (label)	1 every 8–12 h; max 3 in 24 h	2 every 6 h; max 6 in 24 h
Duration of action	Long (8+ hours in Cochrane overview)	Shorter; dosed every 6 hours
Key label warnings	Stomach bleeding; heart attack and stroke	Liver damage; severe skin reactions
Ask a doctor first if	Ulcers, high blood pressure, heart or kidney disease, diuretics, aspirin for the heart	Liver disease; taking warfarin
OTC duration limit	Pain 10 days, fever 3 days (stop and ask)	Pain 10 days, fever 3 days

Doses above are from the current U.S. Drug Facts or prescribing labels listed in Sources. Always follow the label on the package you buy, because store brands and formulations differ.

How They Work

Naproxen blocks cyclooxygenase (COX) enzymes, reducing prostaglandins that drive pain, fever and inflammation. Because prostaglandins also protect the stomach lining and help regulate kidney blood flow and clotting, NSAIDs carry stomach, kidney and cardiovascular risks. Acetaminophen relieves pain and fever mainly through effects in the central nervous system and has little anti-inflammatory effect, so it does not carry the NSAID stomach-bleeding warning. Its main risk is liver damage when the daily limit is exceeded.

Label Dosing

Aleve (adults and children 12 and older): take 1 tablet every 8 to 12 hours while symptoms last; for the first dose you may take 2 tablets within the first hour; do not exceed 2 tablets in any 8- to 12-hour period or 3 tablets in 24 hours. Drink a full glass of water with each dose, and use the smallest effective dose.

Tylenol Extra Strength (adults and children 12 and older): take 2 caplets every 6 hours while symptoms last; do not take more than 6 caplets in 24 hours unless directed by a doctor; do not use for more than 10 days unless directed by a doctor.

Effectiveness

A 2015 Cochrane overview of single-dose oral analgesics for acute postoperative pain (Moore et al.) found effectiveness varied widely by drug and dose, and many people did not get good relief from any single drug. It listed naproxen 500/550 mg among the analgesics with a long duration of action (8 hours or more), and noted that ibuprofen combined with acetaminophen had among the lowest numbers needed to treat. Postoperative pain is a specific model, so results may not translate directly to headaches, back pain or arthritis.

Safety Compared

Aleve label warnings

Stomach bleeding: the chance is higher if you are 60 or older, have had ulcers or bleeding problems, take a blood thinner or steroid, take other NSAIDs, have 3 or more alcoholic drinks a day, or take more or longer than directed.
Heart attack and stroke: NSAIDs, except aspirin, increase the risk of heart attack, heart failure and stroke, which can be fatal; the risk is higher with more or longer use than directed.
Ask a doctor before use if you have high blood pressure, heart disease, liver cirrhosis, kidney disease or asthma, have had a stroke, or take a diuretic. Ask before use if you take aspirin for heart attack or stroke, because naproxen may decrease this benefit.
Allergy alert: naproxen may cause a severe allergic reaction, especially in people allergic to aspirin. Do not use right before or after heart surgery.

Tylenol label warnings

Liver warning: severe liver damage may occur if you take more than 4,000 mg of acetaminophen in 24 hours, take it with other drugs containing acetaminophen, or have 3 or more alcoholic drinks every day while using it.
Do not use with any other drug containing acetaminophen; many cold, flu and sleep products contain it.
Ask a doctor before use if you have liver disease; ask a doctor or pharmacist if you take warfarin.
Acetaminophen may cause severe skin reactions; stop and seek help if a rash, blisters or reddening occur.

Taking Them Together or Alternating

Because naproxen and acetaminophen belong to different classes, clinicians sometimes recommend combining or alternating them for a short period. Do this only with advice from a clinician or pharmacist, keep each within its own label maximum, and track doses so you do not double up on acetaminophen hidden in combination products.

Who Should Talk to a Clinician First

People with heart disease, high blood pressure, kidney disease, past ulcers or bleeding, or who take blood thinners: discuss NSAIDs first.
People with liver disease or who drink 3 or more alcoholic drinks daily: discuss acetaminophen first.
Pregnancy: both labels say to ask a health professional; NSAID labels include specific late-pregnancy warnings.

See also Tylenol vs Advil and Aleve vs Advil.

Putting It Together: Common Situations

The scenarios below summarize what the labels and guidelines cited on this page say. They are general information, not a personal treatment plan. Your pharmacist can check the choice against your other medicines, and your clinician can tailor it to your health history.

Need longer-lasting relief: the Aleve label allows a dose every 8 to 12 hours.
History of ulcers, heart or kidney disease: the Aleve label says to ask a doctor first; acetaminophen avoids NSAID-specific risks but has its own liver limit.
Regular alcohol use (3+ drinks daily): both labels flag this, for stomach bleeding with Aleve and liver damage with Tylenol.

How to Read the Label Before You Buy

Find the active ingredient first. Brand names are often reused across products with different ingredients. The active ingredient and its strength appear at the top of the Drug Facts or Supplement Facts panel.
Check the “Uses” or labeled indication. A product is tested and labeled for specific uses. Using it for something else may not help.
Read the “Do not use” and “Ask a doctor before use” sections. They list conditions and medicines where the product may be unsafe.
Follow the directions for dose and duration. Note the maximum daily amount and how many days you can use it before checking with a clinician.
Check for duplicate ingredients. Combination products can contain the same ingredient as something else you take, which raises the risk of taking too much.
Note the “Stop use and ask a doctor” signs. These are the label’s own warning signs that a product is not working or is causing harm.

Common Mistakes to Avoid

Doubling up on hidden acetaminophen in cold, flu or sleep products.
Taking two NSAIDs together, such as Aleve with ibuprofen; the Aleve label lists other NSAIDs as a bleeding risk factor.
Assuming two products with similar names are interchangeable. Compare the active ingredients and strengths instead of the packaging.
Forgetting to tell your clinician. Keep a current list of every prescription, OTC medicine and supplement you take, and bring it to appointments and the pharmacy.

FormulaCompare does not recommend one brand over another. Use the sources below to check the details for the exact product in front of you, since formulas and labels can change.

When to Talk to Your Doctor or Pharmacist

Stop and ask a doctor if pain lasts more than 10 days or fever more than 3 days, or if redness or swelling appears. Seek urgent care for black or bloody stools, vomiting blood, chest pain, shortness of breath, weakness on one side, slurred speech, leg swelling, yellowing skin or eyes, or a blistering rash. For a possible acetaminophen overdose, get help right away even if you feel well.

Frequently Asked Questions

Is Aleve or Tylenol better for back pain?

It depends on the person. Aleve is an NSAID that also reduces inflammation and lasts longer per dose; Tylenol avoids NSAID stomach and heart risks but has a strict liver limit. Ask a clinician if you have health conditions.

Which is easier on the stomach?

Acetaminophen does not carry the NSAID stomach-bleeding warning. Aleve’s label lists stomach bleeding risk factors.

Can I take Aleve and Tylenol together?

They are different drug classes and are sometimes combined under a clinician’s guidance. Keep each within its label maximum.

How long does Aleve last?

The label allows a dose every 8 to 12 hours, and the Cochrane overview lists naproxen among long-acting analgesics.

What is the maximum Tylenol per day?

The Extra Strength label allows up to 6 caplets (3,000 mg) in 24 hours unless a doctor directs otherwise, and warns of liver damage above 4,000 mg.

Is Aleve safe with high blood pressure?

The label says to ask a doctor before use if you have high blood pressure or heart disease.

Sources

Medical disclaimer: This article is for educational purposes and does not replace medical advice. Consult a licensed healthcare provider before starting any supplement, medication, or treatment — particularly if you are pregnant, breastfeeding, taking other medications, or have a diagnosed medical condition.