Medical Definition of PEYOTE. 1. : a hallucinogenic drug containing mescaline that is derived from peyote buttons and used especially in the religious ceremonies of some American Indian peoples.2.edical Definition of PEYOTE. 1. : a hallucinogenic drug containing mescaline that is derived from peyote buttons and used especially in the religious ceremonies of some American Indian peoples. 2.
Ketamine was invented in 1962 as a very effective anesthetic for routine surgery. It is blocks the neurotransmitter molecule glutamate from its NMDA receptor in brain neurons, and affects primarily the memory center in the hippocampal region of the brain, along with the prefrontal cortex abstract thought center.
LIMITATIONS AND WARNINGS FOR KETAMINE USE. 1  The increase in muscle tone produced by ketamine makes it unsuitable for operations where muscle relaxation is needed[11] 2  It is not indicated in conditions like hypertension, schizophrenia and raised intraocular pressure[10]