It seems to me that hallucinogenics were used by many tribal and polytheistic religions, or that it may at least have some base. I've heard some think God appearing as a burning bush was from Moses burning some Acacia trees and breathing it in. Also I had heard accounts of what Greeks would drink for wine seems to sound more like hallucinogenics than drunkenness. There are so many more that used it for religious ceremonies , (vikings, etc). It seems to me though like by the time the Mideival era rolled around there was not as much mention of it, and by the industrial era, I feel like it would have been a foreign concept in th e west.