There is little evidence on any intervention that can prevent psychosis. As substances like alcohol or drugs can cause psychosis, avoiding these substances can reduce the risk of developing psychosis. It is important to detect psychosis early and investigate the causes.
Psychiatric evaluation is used to diagnose the cause of psychosis. Laboratory tests may be carried out to rule out physical illnesses that may be causing psychosis. This may include blood tests or brain imaging.
Treatment for psychosis depends on the cause. If it is due to a medical condition, then that condition will be treated accordingly. If it is due to a psychiatric condition, a combination of medication and therapy may be employed to treat the psychosis.