Clinical Definition Acetylsalicylic acid, also known as aspirin, is classified as a non-steroidal anti-inflammatory pharmaceutical agent. It contains salicylic acid, the active metabolite that inhibits prostaglandins. Acetylsalicylic acid is used as an antipyretic and analgesic. It is also sometimes prescribed as antiplatelet agent in order to reduce the risk of a myocardial infarction and cerebrovascular…