How much aspirin should women take to prevent heart attack?

Holly S. Andersen, MD
Cardiology (Cardiovascular Disease)
The dose of aspirin that is most beneficial to prevent heart attacks in women is one or two low-dose/baby aspirin, which equals about 162 milligrams. Watch cardiologist Holly Andersen, MD, explain how much aspirin is safe to take for prevention.
For women who should be on aspirin therapy, it doesn't take much to get the benefits. Studies find that between 75 and 100 mg, known as "low-dose aspirin therapy," are enough to reduce the risk for heart attack or angina. Most aspirin brands come in low-dose formulations of 81 mg. The upper dosage for aspirin in women at a high risk for heart disease is 325 mg.

Aspirin's cardioprotective benefits stem from its unique ability to interfere with the blood cells that are responsible for forming sticky clots. Aspirin also soothes inflammation in the arteries, which can help protect blockages from developing.

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