Hallucinogens alter perception and thinking and are natural or synthetically made. They affect several areas of the brain, and the effects can last:

A. 5 to 10 hours: A close approximation but less accurate than the typical 6 to 12 hours reported for many hallucinogens like LSD. B. 6 to 12 hours: The effects of common hallucinogens such as LSD and psilocybin can last 6 to 12 hours, depending on dosage and substance. C. 2 to 4 hours: This duration aligns more with some stimulants or shorter-acting drugs, not most hallucinogens. D. 1 to 2 hours: Too short for hallucinogenic effects; may be confused with fast-acting inhalants or some sedatives.