Well tolerated, occasionally see rash, nausea, vomiting, sweating, abdominal pain, anorexia and pallor, etc., individual patients after the initial dose of drowsiness or mild dizziness, symptoms disappeared after stopping the drug; occasionally cause methemoglobinemia and cyanosis. Long-term or large amounts of use of liver and kidney function are damaged; sometimes hallucinations, mental disorders, occasional slurred speech, involuntary eye movements, generally is the central nervous system over-excitement or toxicity; for elderly patients, can lead to urinary difficulties, fainting, often cause postural hypotension; occasionally leukopenia; more persistent adverse reactions are: inability to concentrate, dizziness, dizziness, easy to get agitated, Anorexia, nervousness, purplish-red reticulated spots or reticulated cyanotic spots on the skin, sleep disorders, nightmares. Rarely, headache, blurred vision, dryness of the mouth, nose and throat, constipation, fatigue and weakness; swelling of the lower limbs can be seen in long-term treatment. Drinking alcohol while taking this product will increase the adverse effects of this product. Overdose should be closely observed for the occurrence of side effects and poisoning, and attention should be paid to monitoring blood pressure, pulse, respiration and body temperature. If more than 8 tablets are taken, nausea, vomiting, stomach pain or stomach cramps, diarrhea, anorexia, excessive sweating and other symptoms can occur very quickly and can last for 24 hours. liver function damage occurs within 2 to 4 days, manifested as pain in the liver area, hepatomegaly, jaundice.