A mushroom is new item in SLASH'EM. When eaten, it will have one of the following effects:

Chance	Effect	Message
2/10	Unless you are poison-resistant, lose 1-4 strength, and 1-15 health.
1/10	Stunned for 30 (more) turns.	"That mushroom tasted a little funny"
1/10	Hallucinate for 150 (more) turns.	"Whoa! Everything looks groovy!"
1/10	Gain 1 strength.
5/10	Nothing special happens.