Marijuana, REM Sleep, and Dreams

(Photo: cblue98/Flickr)
Marijuana can affect how often you dream by rearranging your sleep cycle.
People who smoke marijuana before bed often struggle to recall their dreams the next morning. Yet, when these individuals stop smoking, they tend to experience more vivid dreams than before.
Marijuana is known to affect various aspects of sleep, including activities that are not involved with dreaming. But there’s a simple reason why marijuana users tend to have less dreams.