Psychosis is a loss of contact with reality, usually including false beliefs about what is taking place or who one is (delusions) and seeing or hearing things that aren't there (hallucinations).
A number of substances and medical conditions can cause psychosis, including:
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Source: ADAM Encyclopedia
Brief reactive psychosis is a sudden, short-term display of psychotic behavior, such as hallucinations or delusions, that occurs with a stressful... Read more »
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