LSD (lysergic acid diethylamide), first synthesized in 1938, is an extremely potent hallucinogen. It is synthetically made from lysergic acid, which is found in ergot, a fungus that grows on rye and other grains. It is so potent its doses tend to be in the microgram range. It?s effects, often called a ?trip? can be stimulating, pleasurable, and mind-altering or it can lead to n unpleasant, sometimes terrifying experience called a ?bad trip.?