Hallucinogens are man made, or grown naturally.
Many hallucinogens are in the form of a white powder. They have no taste and are found as tablets, capsules, tiny sheets of paper, or liquid. Certain types of mushrooms and datura plants are also hallucinogens. These drugs are injected, taken orally, or eaten. Hallucinogens produce radical changes in the mental state, involving distortions of reality and acute hallucinations.