i too, often have dreams that come true...one of the weirder ones:
i was standing in the middle of the woods and there was debris everywhere....then i saw something big, but it wasn't together, shit was spread everywhere...it was a plane crash...i saw shit from the plane everywhere....two days later i'm watching the news and there's the plane crash in the exact same way i had seen it. stuff like that happens to me often.....as for the original question...yes i do find that if i'm under the influence of anything (from sleeping pills to weed) that i do dream deeper, more clearly, and more realistic.