Psychedelic phenethylamine , naturally occurring in the peyote cactus (Lophophora williamsii) and other cacti
Similar to, but chemically distinct from and less potent than LSD
Thought to be a serotonin agonist
Sold as dried cactus parts or "buttons"
Used in religious ceremonies by some indigenous Central and South american peoples.
Mescaline toxicity
Serotonin-Like Agents
Xylazine toxicity
Lysergic acid diethylamide 
Acetaminophen toxicity
Psilocybin 
Tianeptine toxicity
N,N-Dimethyltryptamine 