Last updated on RxList: 8/5/2020
Drug Description

What is Bayer Aspirin and how is it used?

Bayer ASPIRIN is an over the counter medicine used to reduce the risk of having a heart attack in people who have heart disease or to reduce the risk of stroke in people who have had a stroke or "mini-stroke". Bayer ASPIRIN may be used alone or with other medications.

Bayer ASPIRIN is a salicylate and a nonsteroidal anti-inflammatory drug (NSAID).

What are the possible side effects of Bayer Aspirin?

Bayer Aspirin may cause serious side effects including:

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

Get medical help right away, if you have any of the symptoms listed above.

The most common side effects of Bayer Aspirin include:

  • upset stomach,
  • heartburn,
  • drowsiness, and
  • mild headache

Tell the doctor if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of Bayer Aspirin. For more information, ask your doctor or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


Active ingredient (in each tablet)
Aspirin (acetylsalicylic acid). Pain reliever/fever reducer

Inactive ingredients
carnauba wax*, corn starch, hypromellose, powdered cellulose, triacetin

* may contain this ingredient

Indications & Dosage

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  • drink a full glass of water with each dose
  • adults and children 12 years and over: take 1 or 2 tablets every 4 hours or 3 tablets every 6 hours, not to exceed 12 tablets in 24 hours
  • children under 12 years: consult a doctor

Other information

  • save carton for full directions and warnings
  • store at room temperature

Questions or comments?
1-800-331-4536 (Mon-Fri 9AM – 5PM EST)



Tablets and caplets are available in the following package types:

Travel pack - 12 tablets
Bottles of 24, 50, 100, 200, 300, and 400 tablets
Bottles of 50 and 100 caplets
There are child-resistant safety closures on packages of 12, 24, 50, 200, 300, and 400 tablets and 100 caplets. Bottles of 100 tablets and 50 caplets are available without safety closure for households without small children.

Copyright ©2006 Bayer (aspirin) HealthCare LLC. All Rights Reserved. FDA rev date: 10/25/1995


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Side Effects & Drug Interactions


No information provided.


No information provided.

Warnings & Precautions


Reye's syndrome: Children and teenagers should not use this medicine for chicken pox or flu symptoms before a doctor is consulted about Reye's syndrome, a rare but serious illness reported to be associated with aspirin.

Allergy alert: Aspirin may cause a severe allergic reaction which may include:

  • hives
  • facial swelling
  • asthma (wheezing)
  • shock


No information provided.

Overdose & Contraindications


No information provided.


Aspirin is not appropriate for everyone, so be sure to talk to your doctor before you begin an aspirin regimen.

Clinical Pharmacology


As the active ingredient in aspirin, acetylsalicylic acid works by inhibiting several different chemical processes within the body, including the natural physiological processes causing pain and inflammation.

Aspirin relieves pain by inhibiting production of chemicals called prostaglandins, aspirin works to diminish the body's response to a chain of chemical processes that eventually leads to pain. This mechanism of action works on a cellular level.

Medication Guide


Alcohol warning: If you consume 3 or more alcoholic drinks every day, ask your doctor whether you should take aspirin or other pain relievers/fever reducers. Aspirin may cause stomach bleeding.

Do not use if you are allergic to aspirin or any other pain reliever/fever reducer

Ask a doctor before use if you have:

  • stomach problems (such as heartburn, upset stomach, or stomach pain) that last or come back
  • bleeding problems
  • ulcers
  • asthma

Ask a doctor or pharmacist before use if you are taking a prescription drug for:

Stop use and ask a doctor if:

  • an allergic reaction occurs. Seek medical help right away.
  • pain gets worse or lasts more than 10 days
  • redness or swelling is present
  • fever lasts more than 3 days
  • new symptoms occur
  • ringing in the ears or loss of hearing occurs

If pregnant or breast-feeding, ask a health professional before use. It is especially important not to use aspirin during the last 3 months of pregnancy unless definitely directed to do so by a doctor because it may cause problems in the unborn child or complications during delivery.

Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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