Aspirin or acetylsalicylic acid is a derivative of salicylic acid and is a mild nonnarcotic analgesic. It is useful in the relief of headache, muscle and joint aches. The drug works by inhibiting the production of prostaglandins, body chemicals that are necessary for blood clotting and which also sensitize nerve endings to pain.
Asprin is used to treat mild to moderate pain, and also to reduce fever or inflammation. It is sometimes used to treat or prevent heart attacks, strokes, and angina.