Amphetamines are synthesized from ephedrine hydrochloride, which is a central nervous system stimulant and has certain effects of refreshment, anti-fatigue and drowsiness treatment, as well as improving asthma and appetite suppression. However, long-term or large amounts of the drug will have a certain degree of addiction, and will also appear poisoning symptoms. 1, mild poisoning, a person can appear headache, high fever, increased blood pressure, night sweats, loss of appetite and other symptoms. 2, if a large dose will lead to confusion, similar to delusional schizophrenia, paranoia, hallucinations, delusions of victimization, etc. 3, if the drug is suddenly stopped, there will be withdrawal syndrome, often The person may experience mental dullness, lethargy, irritability, restlessness, apprehension, and even suicidal tendencies.