... known by trade name Aspirin, is an acetyl derivative of salicylic acid that is a white, crystalline, weakly acidic substance, ... , rheumatic fever, and mild infection. Large doses cause acid-base imbalance and respiratory disturbances and can be fatal, ... and relieve pain, is often substituted for Aspirin.Acetylsalicylic Acid is used in analgesics, anti-inflammatories, antipyretics, anticoagulants ...