The main side effects of antipyretic drugs are as follows: first, often appear is the gastrointestinal side effects, such as the emergence of epigastric stuffy discomfort, hidden pain, nausea, vomiting, fullness, belching, loss of appetite and other indigestion symptoms. If you take antipyretic drugs for a long time, you may have peptic ulcers, and even the possibility of bleeding or perforation. Secondly, it will lead to mild impairment of liver function, such as the appearance of alanine aminotransferase, glutamic aminotransferase elevation. Third, it appears neurological side effects, such as headache, dizziness, tinnitus, deafness, drowsiness, insomnia, abnormal sensation and other symptoms.