"In schizophrenia, antipsychotic medications are proven effective in treating acute psychosis and reducing the risk of future psychotic episodes. The treatment of schizophrenia thus has two main phases: an acute phase, when higher doses might be necessary in order to treat psychotic symptoms, followed by a maintenance phase, which is usually life-long.
During the maintenance phase, dosage is often gradually reduced to the minimum required to prevent further episodes and control inter-episode symptoms. If symptoms reappear or worsen on a lower dosage, an increase in dosage may be necessary to help prevent further relapse.
Even with continued treatment, some patients experience relapses. The most common cause of a relapse is stopping medications."
