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Methamphetamine is a stimulant that the source describes in powder, pill, and crystal forms, with several routes of use. The overview discusses dopamine effects, short- and long-term health consequences, and research on changes in cognition, memory, and brain function associated with prolonged use.
The article reviews evidence that high-dose amphetamine or methamphetamine can produce a paranoid psychosis, sometimes with hallucinations, in a clear state of consciousness. Historical case reports and experimental studies describe varied courses after drug cessation, including rapid remission and, in some cases, prolonged vulnerability or recurrence.
