Commonly Used Brand Name and Generic Aspirins

Generic name: Acetylsalicylic acid

General category: Blood thinner, nonsteroidal anti-inflammatory drug (NSAID), salicylate

Current Uses

Aspirin is used to treat and prevent a range of conditions. This medication may be taken for:

  • Pain relief
  • Fever reduction
  • Reducing the risk of dying when having a heart attack
  • Preventing a heart attack or stroke

There is promising evidence to support that taking an aspirin every day is associated with a reduced risk of dying from cancer after it has been diagnosed.


To prevent cardiovascular disease, the US Preventive Services Task Force (USPSTF) recommends a small daily dose of aspirin. Aspirin is recommended for men aged 45-79 years and women aged 55-79 years as long as the benefits of taking the medication outweigh the risks. One common risk to consider is gastrointestinal bleeding. If you want to start taking aspirin every day, be sure you talk to your doctor first to make sure that it is safe for you.

The American Heart Association recommends aspirin for certain poeple who are at high risk of heart attacks and for poeple who have experienced a heart attack, stroke, or transient ischemic attack (mini-stroke) if not contraindicated.

Take only the amount of aspirin instructed by your doctor. If you are taking aspirin regularly and you need a medication to relieve pain, a fever, or arthritis, your doctor may not want you to take extra aspirin. It is a good idea to discuss this with your doctor, so that you will know ahead of time what medication to take.

Do not stop taking this medication for any reason without first checking with the doctor who directed you to take it.

Mechanism for How It Works

  • Analgesic/NSAID—This inhibits the body’s production of a hormone-like substance called prostaglandin. This chemical causes pain by stimulating muscles contractions and blood vessel dilation. Aspirin may also fight inflammation, including in plaque caused by atherosclerosis, which causes coronary artery disease.
  • Antithrombotic (blood thinning)/Platelet aggregation inhibitor—This prevents platelets from releasing the prostaglandin thromboxane, which causes platelets to clump together in a blood clot. This helps prevent potentially fatal formation of new blood clots in diseased blood vessels.

Side Effects

Aspirin can interact with many types of medications. Some examples include:

  • Other blood thinners
  • Oral medications used to treat diabetes
  • Anticonvulsants
  • Beta-blockers
  • Corticosteroids
  • Other NSAIDs
  • Diuretics

Be sure to talk to your doctor about the specific medications that you are taking.

There are many types of herbs and supplements that can interact with aspirin. Examples include:

To avoid any interactions, it is important that you talk to your doctor about any herbs are supplements that you are taking before you begin aspirin therapy.

If you have one of the following conditions, it may not be appropriate for you to take aspirin due to the increased risk of complications:

  • Liver or kidney disease
  • Peptic ulcer or other gastrointestinal bleeding disorder, or those at risk for these disorders
  • Allergy or intolerance to aspirin or other nonsteroidal anti-inflammatory drugs
  • Hemophilia or other bleeding problems—the chance of bleeding may be increased
  • Gout —salicylates can make this condition worse and can also lessen the effects of some medications used to treat gout
  • Syndrome of asthma, rhinitis, and nasal polyps
  • Children and adolescents with a viral infection
  • Pregnant or lactating women

Low-dose aspirin increases risk for gastrointestinal bleeding and hemorrhagic stroke. Do not use without medical advice if you are at increased risk for these diseases.

Examples of common side effects include:

  • Stomach irritation
  • Nausea/vomiting
  • Increased bleeding

Serious side effects to watch for include:

  • Signs of bleeding in the gut such as vomiting blood or blood in the stool
  • Allergic reaction to aspirin