Both typical and atypical psychotic drugs are used for treating psychotic problems. While typical psychotic drugs are often called first-generation antipsychotics, atypical psychotic drugs, on the other hand, are known as second-generation antipsychotics. Atypical psychotic drugs are mostly used in treating diseases compared to typical psychotic drugs; this is because atypical psychotic drugs do not have more side effects when you compare them to the side effects of typical psychotic drugs.
Another reason is that atypical psychotic drugs work very faster than typical psychotic drugs. Also, people get more addicted to typical psychotic drugs compared to atypical psychotic drugs. For these reasons, atypical psychotic drugs are normally prescribed for patients to use. However, a patient is more liable to become psychotic again if he stops using the drugs. First-generation antipsychotics are mostly used to treat, agitation, anxiety, etc., while second-generation antipsychotics are used to treat bipolar diseases, depression, etc.