Aspirin is an ANALGESIC drug, commonly used to relieve pain and reduce fever. It is a non-steroidal anti-inflammatory drug (NSAID) that works by blocking the production of certain chemicals in the body that cause inflammation. Aspirin has been used for centuries to treat a variety of ailments, including headaches, muscle aches, and arthritis. It is also used to prevent heart attacks and strokes. Aspirin is one of the most widely used drugs in the world and is available over-the-counter in many countries.