We humans are very social beings, and as such extremely sensitive to the social environment around us. A deep discussion of a mystical nature does in fact change the way we perceive reality. Back with my old coven, we'd discuss dreams and visions without any psychedelics, and just by creating the environment of such a sharing circle, we all experienced an altered state of consciousness, even a level of empathy and telepathy.
So yes, if you 'pull others into your mystical reality' while on psychedelics, it can to a degree 'become infectious'.
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But it's not the psychedelic itself that does it. It's not 'being high' that transfers, it's the introspective, deep-delving mystical mindset.
Do you believe in the THIRD SUMMER OF LOVE?