Drug use tends to make you go the opposite direction from awakening. Psilisoben can cause permenent brain damage and the need for life long medications and or institutionalization.
Psilocybin is actually non-toxic. It doesn't cause damage to your body and you have to eat an insane amount to actually overdose on them in a physiological sense.
Psychologically, you can "overdose" easily if you aren't prepared for the trip. Like I said, these mushrooms are medically non-toxic, they can't hurt you in that way any more than eating shiitake mushrooms,
but the guy being talked about in the OP sounds like he has a form of psychosis now.
So I don't personally think the guy is suffering from "premature awakening," I think he's suffering from a form of clinical psychosis and he probably needs to talk to somebody. Psychologists today are not supposed to just label you a nut and lock you up. They really try to talk with people and see if how they are living is really what they want, if they think they are seeing the world in a healthy way, and that sort of thing. Then again some just try to give you pills to basically make you brain dead so maybe some homework is in order. But I feel sorry for the guy because I know lots of people with some form of psychosis, or predisposition toward it, and it really is a frustrating thing. It takes somebody who really knows what they're doing to help people like that.
Also I don't want to sound like I'm beating up on the guy because he believes he's seeing demons. I believe in some "crazy" stuff myself, so that's not the issue for me. The problem is whether or not this guy is able to live a functional adult life with responsibilities and all of that, just like anybody else. If this demon stuff is interfering with that, then that's not a healthy way of seeing the world and he needs a tune-up of sorts.