Dichlorvos is a kind of organophosphorus pesticide, after drinking dichlorvos it is easy to have organophosphorus pesticide poisoning, serious life threatening. The symptoms of drinking dichlorvos are usually nausea, vomiting, abdominal pain and diarrhea, which are relatively mild. If the sympathetic nerve is affected, resulting in sympathetic excitement, there will be increased secretion of glands, drooling and excessive sweating, and in serious cases, it will lead to smooth muscle spasm of bronchi, breathing difficulties, urinary incontinence, and also bradycardia and drop in blood pressure, which may lead to life threatening. If neuromuscular stimulation of the transverse muscle occurs, resulting in increased muscle tone, there will be a feeling of tightness, pressure, and muscle spasms throughout the body. If the central nervous system is affected, dizziness, headache, and blurred vision may occur in mild cases, and in severe cases, coma, convulsions, and respiratory and heartbeat depression may lead to death.