If high-dose aspirin is used to relieve pain, low-dose aspirin is a treatment for preventing heart attacks and strokes in people at high risk such as having had heart surgery or having had angina due to heart disease. So how best to use low-dose aspirin to prevent heart attacks?

Pregnant women at high risk of developing preeclampsia (a serious obstetric condition) should take low-dose aspirin daily after the first trimester of pregnancy.