The original criteria for<unk>  were the following: *A. Continuous use of antipsychotics for at least 3 months. *B. One of the following: :*1. Rebound psychosis within 6 weeks of a change (e.g. dose reduction, or antipsychotic switching) in an oral antipsychotic regimen or 3 months for long-acting injectable antipsychotics :*2. Tolerance to antipsychotic effects (requiring escalating doses, even beyond what has controlled symptoms in the past) :*3. Presence of tardive dyskinesia (which should occur when antipsychotics are withdrawn, and improve or disappear when antipsychotics are restarted) Differential diagnosis It may sometimes be impossible to distinguish<unk>  from psychosis that occurs "naturally" in the course of a primary psychotic disorder like schizophrenia, including cases in which the person was not taking their antipsychotic medication. Even in the presence of an alternative etiology, or when it is impossible to determine the precise etiology for a psychotic episode, it is possible that<unk>  can play a role in the presentation. Recognizing the possible role of<unk>  in a psychotic episode has implications for how to best manage someone's antipsychotic therapy.
Dopamine supersensitivity psychosis
Substance-induced psychosis
Unitary psychosis
Pseudoneurotic schizophrenia
Stimulant psychosis
Myxedema psychosis
Tardive psychosis
Disorganized schizophrenia