Avoid aspirin because it presents a risk for a fatal condition known as Reye's syndrome, especially in children.

Many doctors have avoided aspirin soon after surgery, for fear that it would cause bleeding, but that was not a problem in the study.

Avoid aspirin when treating a fever in children, especially if they may have a viral illness, to reduce the risk of Reye syndrome.

You should also avoid aspirin if you:

Young people (including those in their early 20s) should avoid aspirin.

You'll avoid aspirin or aspirin-containing products and herbal supplements one week prior to surgery, and take only clear liquids for 24-48 hours immediately before surgery.

Avoid aspirin, because it may abruptly change uric acid levels in the blood.

Avoid aspirin, which may abruptly raise uric acid levels in the blood.

But avoid these if you have kidney problems or if your doctor has told you to avoid aspirin because it upsets your stomach.

Avoid aspirin or ibuprofen (Advil, Motrin), which can prolong bleeding.