Aspirin has some side effects on the liver. Aspirin belongs to non-steroidal antipyretic and analgesic agents, which are salicylic acid derivatives, and can be used to relieve mild or moderate pain (e.g., toothache, headache, neuralgia, muscle aches and pains, etc.), and also used for antipyretic treatment of febrile illnesses, such as colds and influenza, and also for the treatment of rheumatic pains and so on. Aspirin also has a platelet inhibitory effect and can be used to prevent transient ischemic attacks, myocardial infarction, artificial heart valves and venous fistulas or other post-surgical thrombosis. The use of aspirin may exacerbate hepatotoxic reactions and bleeding tendencies if the patient has concomitant hepatic decompensation, and patients with hepatic insufficiency and cirrhosis are prone to adverse renal reactions, so caution is advised. It is contraindicated in patients with active ulcers and or other causes of gastrointestinal bleeding, hemophilia or thrombocytopenia, history of allergy to aspirin or other non-steroidal anti-inflammatory drugs, angioneurotic edema, and shock. Aspirin should be used under the supervision of a doctor and should not be used without authorization.