At low doses, marijuana may cause drowsiness, but at higher doses it seems to interfere with sleep. Specifically, it tends to decrease total REM time and also decrease eye movement during REM sleep.
Re: What are the hamful effects of marijuana?

(I love to dream, but I stop remembering them when I get stoned)
Oh My High Reviewed by Oh My High on . What's with my dreams? Ok, so I know we all dream every time we sleep (or at least sleep long enough), but ive noticed that when I smoke on a regular basis I very rarely remember my dreams, and when I lay off for a couple weeks or longer I start to remember my dreams pretty frequently. Does this happen to anyone else and does anyone know why this happens? Is it an effect of THC or is it just my own physiology? Also does anyone notice an opposite effect when they smoke? Rating: 5