THE usual oral dose (25μg to 150μg) of lysergic acid diethylamide (LSD) required for a desired psychedelic effect is far below that which causes other serious derangements directly attributable to its pharmacologic activity. Complications of the illicit oral use of the drug, despite larger doses, are also largely limited to its hallucinogenic and psychologic effect. Doses of 20μg/kg of body...