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Psychosis: Drugs
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Psychosis can be short-term or long-term. A short-term psychosis is often related to exposure to certain drugs or substances. Certain medical conditions can ... result in psychosis. Many other medical problems can cause psychosis, such as problems with the brain or nervous system.
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Psychosis is a mental condition when you are unable to distinguish between what is real, and what is imaginary. It is usually caused by an underlying mental illness, but can ... be caused by other factors such as drug abuse.
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The causes of psychosis are not fully understood. It is likely that psychosis is caused by a combination of hereditary and other factors. Psychosis may be due to a chemical imbalance in the brain. Stress and certain drugs (for example, marijuana, speed or LSD) can trigger the first episode of psychosis.
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Some studies indicate that cannabis use correlates with a slight increase in psychotic experience, which may trigger full-blown psychosis in some people. Early studies have been criticized for failing to consider other drugs (such as LSD) that the subjects may ... have used before or during the study, as well as other factors such as possible pre-existing mental health issues. However, more recent studies with better control have still found a small increase in risk for psychosis in cannabis users. It is still not clear whether this is a causal link, and it may be that cannabis use only increases the chance of psychosis in people already predisposed to it. The fact that cannabis use has increased over the past few decades, whereas the rate of psychosis has not, suggests that a direct causal link is unlikely for all users.
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Some studies indicate that cannabis use may lower the threshold for psychosis, and ... help to trigger full-blown psychosis in some people. Early studies have been criticized for failing to consider other drugs (such as LSD) that the participants may have used before or during the study, as well as other factors such as pre-existing ("comorbid") mental illness. However, more recent studies with better controls have still found a small increase in risk for psychosis in cannabis users.
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Intoxication with drugs that have general depressant effects on the central nervous system (especially alcohol and barbiturates) tend not to cause psychosis during use, and can actually decrease or lessen the impact of symptoms in some people. Withdrawal from barbiturates and alcohol can be particularly dangerous... leading to psychosis or delirium and other, potentially lethal, withdrawal effects.
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