LSD is sold on the street in tablets, capsules, or occasionally in liquid form. It is usually taken by mouth but sometimes is injected. Often it is added to absorbent paper, such as blotter paper, and divided into small decorated squares, with each square representing one dose. Mescaline comes from the peyote cactus and although it is not as strong as LSD, its effects are similar. Mescaline is usually smoked or swallowed in the form of capsules or tablets.
Psilocybin comes from certain mushrooms.
The mushrooms themselves, fresh or dried, may be eaten. Its effects begin almost immediately and last for 30-60 minutes. The effects of psychedelics are unpredictable. It depends on the amount taken, the user's personality, mood, and expectations, and the surroundings in which the drug is used. Usually, the user feels the first effects of the drug 30-90 minutes after taking it.