In larger doses, mushrooms can produce:
- dizziness
- lightheadedness
- abdominal discomfort
- numbness of tongue, lips, or mouth
- nausea
- anxiety
- shivering
Marked changes in perception gradually develop, and the user experiences effects similar to those of LSD. Other reported effects include:
- a sense of time passing slowly
- yawning
- facial flushing
- sweating
- depersonalization (a feeling of separation from one's body)
- feelings of unreality
- inability to concentrate
LSD and PCP are sometimes contained in mushrooms purchased on the street.