الفهرس 
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Abstract
The emerging literature on first-episode psychosis highlights the high prevalence and adverse consequences of substance use, misuse, or disorder. Approximately one-half of first-episode clients have a history of cannabis abuse or dependence and one-third have a current cannabis use disorder.
There is strong evidence that substance abuse is associated with greater risk for developing psychosis. More systematic examination of this issue is likely to throw light on the neurobiology of psychosis and possibly help the vulnerable population in primary prevention.
Also known as substance-induced psychotic disorder this is a condition that is characterized by psychotic symptoms, like hallucinations and delusions caused by the use of a drug or substance or by withdrawal from a substance. The disorder may be acute and last only as long as the drug is in the body, as is often the case with hallucinogenic drugs like LSD. In some cases, however, the psychosis can persist for longer periods of times, in rare instances even for years.
To actually be diagnosed with substance-induced psychotic disorder, the symptoms must persist beyond the typical symptoms that are commonly caused by a drug. The symptoms must be in excess of what is normally expected from a specific substance or persist after the person has detoxed from the drug or substance.
Substances induced psychosis and other types of psychosis presented with almost the same symptoms so detailed history and urine screenings test are essential for acute psychosis patients.
The aim of this study was to clarify the role of substances abuse among patients of Acute Psychotic Episode.