Acetylsalicylic acid, also known as aspirin, is a drug in the family of salicylates. It's often used as an analgesic, antipyretic, anti-inflammatory, and anticoagulant. It is also used to treat heart attacks.
Phenacetin is used as an analgesic due to its actions on the sensory tracts of the spinal cord. It is also an antipyretic, and used to treat rheumatoid arthritis, intercostal neuralgia, and ataxia. It was removed from the market in 1983 because of its link to analgesic-induced nephropathy and is possibly carcinogenic.