Acetaminophen is the active metabolite of phenacetin, an antipyretic analgesic, white crystal or crystalline powder; odorless, slightly bitter taste. Its analgesic mechanism is not very clear, it may produce analgesic effect by inhibiting the synthesis of prostaglandins in the central nervous system and blocking the impulse of pain nerve endings. It has good antipyretic and analgesic effect, and has no effect on platelet and coagulation mechanism.paracetamol powder manufacturers in china,