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Aspirin

Generic name: aspirin (oral)

Brand names: Arthritis Pain, Aspi-Cor, Aspir 81, Aspir-Low, Bayer Plus, Bufferin, Durlaza, Ecotrin, Ecpirin, Miniprin, Vazalore

Last updated August 24, 2026 1 views Reviewed by Melisa Puckey, BPharm
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What is aspirin?

Aspirin is a salicylate (sa-LIS-il-ate). It works by reducing substances in the body that cause pain, fever, and inflammation.

Aspirin is used to treat pain, and reduce fever or inflammation. It is sometimes used to treat or prevent heart attacks, strokes, and chest pain (angina).

Aspirin should be used for cardiovascular conditions only under the supervision of a doctor.

How should I take aspirin?

Take aspirin exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Drink a full glass of water with each dose.

Always follow directions on the medicine label about giving aspirin to a child.

Take with food if aspirin upsets your stomach.

You must chew the chewable tablet before you swallow it.

Do not crush, chew, break, or open an enteric-coated or delayed/extended-release pill. Swallow the pill whole.

If you need surgery, tell the surgeon ahead of time that you are using this medicine. You may need to stop using it for a short time.

Do not use aspirin if you smell a strong vinegar odor in the bottle. The medicine may no longer be effective.

Store at room temperature away from moisture and heat.

Warnings

You should not use aspirin if you have a bleeding disorder such as hemophilia, a recent history of stomach or intestinal bleeding, or if you are allergic to an NSAID (non-steroidal anti-inflammatory drug) such as Advil, Motrin, Aleve, Orudis, Indocin, Lodine, Voltaren, Toradol, Mobic, Relafen, Feldene, and others.

Do not give this medication to a child or teenager with a fever, flu symptoms, or chickenpox. Salicylates can cause Reye's syndrome, a serious and sometimes fatal condition in children.

Before taking this medicine

Do not give this medicine to a child or teenager with a fever, flu symptoms, or chickenpox. Aspirin can cause Reye's syndrome, a serious and sometimes fatal condition in children. Call your doctor right away if a child taking this medicine has changes in behavior with nausea and vomiting.

You should not use aspirin if you are allergic to it, or if you have:

  • a recent history of stomach or intestinal bleeding;
  • a bleeding disorder such as hemophilia; or
  • if you have ever had an asthma attack or severe allergic reaction after taking aspirin or an NSAID (non-steroidal anti-inflammatory drug) such as Advil, Motrin, Aleve, Orudis, Indocin, Lodine, Voltaren, Toradol, Mobic, Relafen, Feldene, and others.
  • had a tonsillectomy or oral surgery within the past 7 days.

To make sure this medicine is safe for you, tell your doctor if you are age 60 or older, or if you have:

  • asthma or seasonal allergies;
  • stomach ulcers;
  • liver disease;
  • kidney disease;
  • a bleeding or blood clotting disorder;
  • gout, diabetes, or arthritis; or
  • heart disease, high blood pressure, or congestive heart failure.
  • not been drinking fluids, or have lost a lot of fluid due to vomiting or diarrhea.

Ask a doctor before using this medicine if you are pregnant or plan to become pregnant. It is especially important not to use aspirin at 20 weeks or later in pregnancy unless definitely directed to do so by a doctor because it may cause problems in the unborn child or complications during delivery.

Ask a doctor before using this medicine if you are breastfeeding.

Aspirin side effects

Get emergency medical help if you have signs of an allergic reaction to aspirin: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Aspirin may cause serious side effects. Stop using this medicine and call your doctor at once if you have:

  • ringing in your ears or loss of hearing, confusion, hallucinations, rapid breathing, seizure (convulsions);
  • severe nausea, vomiting, or stomach pain;
  • bloody or tarry stools, coughing up blood or vomit that looks like coffee grounds;
  • fever lasting longer than 3 days; or
  • swelling, or pain lasting longer than 10 days.

Common side effects of aspirin may include:

  • upset stomach;
  • heartburn;
  • drowsiness; or
  • mild headache.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What happens if I miss a dose?

Since aspirin is used when needed, you may not be on a dosing schedule. If you are on a schedule, use the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not use extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include stomach pain, vomiting, diarrhea, vision or hearing problems, fast or slow breathing, or confusion.

Avoid drinking alcohol while you are taking aspirin. Heavy drinking can increase your risk of stomach bleeding.

If you are taking this medicine to prevent heart attack or stroke, avoid also taking ibuprofen (Advil, Motrin). Ibuprofen may make this medicine less effective in protecting your heart and blood vessels. If you must use both medications, ask your doctor how far apart your doses should be.

Ask a doctor or pharmacist before using any cold, allergy, or pain medication. Many medicines available over the counter contain aspirin or an NSAID. Taking certain products together can cause you to get too much of this type of medication. Check the label to see if a medicine contains aspirin, ibuprofen, ketoprofen, naproxen, or an NSAID.

What other drugs will affect aspirin?

Ask your doctor before using aspirin if you take an antidepressant such as citalopram, escitalopram, fluoxetine (Prozac), fluvoxamine, paroxetine, sertraline (Zoloft), trazodone, or vilazodone. Taking any of these medicines with an NSAID may cause you to bruise or bleed easily.

Ask a doctor or pharmacist if it is safe for you to use this medicine if you are also using any of the following drugs:

  • a blood thinner (warfarin, Coumadin, Jantoven), or other medication used to prevent blood clots; or
  • a steroid medicine; or
  • other salicylates such as Nuprin Backache Caplet, Kaopectate, KneeRelief, Pamprin Cramp Formula, Pepto-Bismol, Tricosal, Trilisate, and others.

This list is not complete. Other drugs may interact with aspirin, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Common questions about aspirin

Does aspirin help for menstrual cramps?
Aspirin may help menstrual pain. It is in a group of drugs called salicylates. It works by reducing substances in the body that cause pain, fever, and inflammation. Aspirin is used to treat mild to moderate pain, and also to reduce fever or inflammation. It is best taken with food and a glass of water.
Can You Take Tramadol with Acetaminophen, Ibuprofen, or Aspirin?
Yes, for most people, tramadol can be safely combined with acetaminophen, ibuprofen, or aspirin, and doing so can provide better pain relief than either medicine alone. However, there are important age restrictions and clinical considerations to be aware of. Continue reading
What's the difference between aspirin and ibuprofen?
Both aspirin and ibuprofen are popular NSAIDs (nonsteroidal anti-inflammatory drugs) that work by blocking prostaglandin production to reduce pain and inflammation. However, these over-the-counter pain relievers have important differences in safety, uses, and side effects. Continue reading
What temperature is considered a fever?
A fever is defined as a body temperature of 38°C (100.4°F) or higher. Normal body temperature is usually 37°C (98.6°F), although it can be about a half degree Celsius higher or lower for some people and that’s normal for them. Continue reading
What cold medicine can you take with diabetes?
If you have diabetes and you catch a cold or flu, there are over-the-counter (OTC) medicines that are safe for you to take to help alleviate your symptoms. Check out our suggestions for pain and fever relievers, cough and congestion medications and more. Remember to look for cold and flu medicines that are less likely to affect your blood sugar (glucose) levels, including sugar-free and alcohol-free options, or worsen any diabetes complications you may have. Continue reading
Aspirin Overdose: Symptoms, Diagnosis, Emergency Treatment
An aspirin overdose can occur after a single large dose (this is called an acute overdose) or develop gradually after taking lower doses for a long time (this is called a chronic overdose). An acute aspirin overdose may be accidental or intentional. A toxic dose of aspirin for a human adult is considered to be 200 to 300 milligrams per kilogram of body weight (works out to be 13,600 to 20,400mg of aspirin for a person who weighs 68 kg [approximately 150 pounds]). A dose of 500 milligrams per kilogram of body weight (34,000mg for a 68kg person) is considered a potentially lethal dose of aspirin, and could result in death. Continue reading
Does aspirin lower blood pressure?
No, aspirin does not appear to affect blood pressure. The effects of aspirin on blood pressure have been studied at doses even higher than 1,500 mg per day, as well as low doses for an average of 4 years. These studies showed that aspirin does not have an effect on blood pressure. Continue reading
Can I give Aspirin to my dog or cat?
No, you should not give aspirin to your dog or cat on your own. Never give aspirin to a cat, because cats cannot break the drug down and it can build up to deadly levels. For dogs, aspirin is only appropriate if your veterinarian specifically tells you to use it. There are no FDA-approved aspirin products for pets, and safer prescription pain medicines are available. Continue reading
How can I treat a migraine at home safely?
Migraines are a common neurological condition characterized by intense, often throbbing pain, typically on one side of the head. While many mild to moderate migraine episodes can be managed safely at home using over-the-counter (OTC) treatments and lifestyle adjustments, it is important to recognize when symptoms warrant medical evaluation. Continue reading

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
General medicine information Consumer-friendly language Source: Drugs.com

Content is provided for education and is not medical advice. See our medical disclaimer. Source page medically reviewed by Melisa Puckey, BPharm on August 24, 2026.