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Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Colloquially known as acid, LSD is a substance that when taken orally induces perceptual changes particularly visual hallucinations in 40 minutes, accompanied by mild hypertension, tachycardia, mydriasis, flushing, salivation, lacrimation and mild ataxia. The effects may last 8 to 12 hours.

Mood changes are unpredictable and range from ecstatic euphoria to terrifying gloom and despair.

Accidental death or suicide under the influence of LSD is reported, but dependence is not recognised.

Prolonged psychotic reactions may occur, lasting from one week to many years in the predisposed person, especially schizophrenics.

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