What they are:

Hallucinogens is a large class of illegal drugs. Sometimes, they’re human-made. These types include LSD or MDMA (ecstasy or molly), PCP (angel dust), and Ketamine (Special K). And some varieties of hallucinogens are found in nature, including psilocybin mushrooms and peyote.1

How they’re taken:

Depending on the substance, hallucinogens can be a swallowed in pill, tablet, or liquid form. They can also be snorted, injected, or inhaled (vaporizing or smoking).2

What they do:

These drugs distort the user’s perception of reality, often through vivid hallucinations. They also alter a user’s thoughts and feelings. Short term side effects include nausea, panic, and increased heart rate.

Signs someone is misusing:

A person using hallucinogens long-term may experience visual disturbances (blurry vision, seeing halos), paranoia, mood disturbances, hallucinations, and difficulty concentrating (unable to think straight). These signs are sometimes mistaken for neurological disorders.4