<human>:  When I take the drug Psilocybin, People may feel like I’m in a dream. Is this normal?
<bot>: Psilocybin is a hallucinogen. It causes a person to feel as if they are in a dream. This effect is due to the action of the drug on the serotonin system in the brain. Serotonin is a neurotransmitter that is responsible for controlling mood, appetite, sleep, and other bodily functions.