Currently, there are so-called “3 generations” of antipsychotic drugs in psychiatry, which are classified mainly on the basis of different drug-receptor binding properties. The “1st generation” antipsychotics are also called typical antipsychotics, while the “2nd generation” and “3rd generation” antipsychotics are also called new or atypical antipsychotics. From clinical observations and most studies, typical and atypical drugs have comparable efficacy, but have different side effects. In general, atypical antipsychotics have positive efficacy and relatively few side effects, making them the drugs of choice for pediatric and adolescent patients. Each atypical antipsychotic drug has its own characteristics and individual differences in efficacy, and not the newer the drug, the better the efficacy.