I've never heard of this. I've been using Cannabis for quite a long time (decades) and I still have dreams. Every night, even. As a child I used to have chroni

I've never heard of this. I've been using Cannabis for quite a long time (decades) and I still have dreams. Every night, even. As a child I used to have chronic nightmares. It is pretty rare these days. So if anything, this lack of dreams (and the return of mainly nightmares) either only affects some people, or it is simply a matter of not remembering the dreams. Or both.