The occurrence of adverse reactions is usually related to the dose of the drug and to the individual patient’s constitution. Adverse reactions vary among different types of antipsychotic drugs. Antipsychotics generally act on receptors or transmitters in the brain, and neurological adverse reactions are often observed. Extrapyramidal adverse reactions are the most common psychiatric drug adverse reactions and are common to all antipsychotic drugs. Extrapyramidal symptoms, such as motor inability, intentional tremor or resting tremor, muscle tonicity, acute dystonia, inability to sit still, and delayed motor abnormalities, occur because antipsychotic drugs block dopamine receptors and also affect transmitter transmission in the extrapyramidal system. Malignant syndrome is the most serious adverse effect of psychiatric drugs. Chlorpromazine was first found to cause malignant syndrome with typical symptoms of hyperthermia, myotonia, and varying degrees of impaired consciousness. Some antipsychotic drugs have strong sedative and hypnotic effects, and symptoms can be more pronounced, especially during the initial period of medication, and can gradually adapt over several weeks. Psychotropic drugs can cause rash, epilepsy, cardiovascular system symptoms, abnormal liver function, granulocytopenia, increased appetite and other adverse effects.