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Andy Stein
June 3, 2026

Common Questions and Answers about Aspirin

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Common Questions and Answers about Aspirin

Here are 5 common FAQs about aspirin.

1.❓What is aspirin used for

Aspirin is used to relieve mild to moderate pain, reduce fever, and help reduce inflammation. It is commonly taken for headaches, toothache, muscle aches, period pain, and symptoms associated with colds and flu.

Low-dose aspirin is also used to help prevent blood clots in certain people who are at increased risk of heart attack or stroke.

2.❓How does aspirin work

Aspirin (acetylsalicylic acid) is a common nonsteroidal anti-inflammatory drug (NSAID). It works by permanently blocking cyclooxygenase (COX) enzymes, stopping the body from producing pain- and inflammation-triggering chemicals called prostaglandins.

It also reduces the ability of platelets in the blood to stick together, which helps lower the risk of blood clot formation.

3.❓What are the common side effects of aspirin

Aspirin is generally well tolerated when taken at the recommended dose. Common side effects may include indigestion, heartburn, nausea, stomach discomfort, and an increased tendency to bruise or bleed.

Taking aspirin with food may help reduce stomach irritation in some people.

4.❓What serious side effects should people be aware of

Serious side effects are uncommon but can include stomach ulcers, gastrointestinal bleeding, severe allergic reactions, and bleeding in other parts of the body.

Medical attention should be sought if symptoms such as vomiting blood, passing black or tarry stools, difficulty breathing, swelling of the face or throat, or unusual bleeding occur.

Aspirin should generally not be given to children under 16 years of age unless specifically advised by a healthcare professional because of the risk of Reye’s syndrome, a rare but serious condition.

5.❓What strengths does aspirin come in

Aspirin is commonly available as 75 mg, 81 mg (low dose to pevent clots); 300 mg, 325 mg, 500 mg and 1g tablets, depending on the country and intended use. It is also available as dispersible, soluble, chewable, and enteric-coated formulations.

Your doctor or pharmacist can advise on the most appropriate strength and dose based on your medical condition and individual circumstances.

Bonus Question

❓What are the common trade names of aspirin?

Aspirin is sold under a number of trade names, including Bayer Aspirin®, Anadin®, Nu-Seals Aspirin®, and Disprin®.

It is also found in some combination pain relief and cold and flu medicines. Checking the ingredients of medicines can help avoid accidentally taking more than the recommended dose or combining aspirin with other medicines that may increase the risk of bleeding.

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