What is the drug dmt and what are the long term and short term affects and can u go crazy from taking it?

its the chemical in ur brain that causes dreams,when u smoke or snort it u go into this weird and intense but SUPER euphoric trip that lasts like 15 minutes,no u cant go crazy,to me its like a walking dream,ur brain makes it every single day...its natural,DMT is in grass,plants,animals...