Cannabis and Sleep: How REM Sleep and Dreams Are Affected Overnight

A Washington Post piece reports that cannabis can suppress REM sleep, potentially altering memory, emotion and dream life. The story follows a smoker who quit and begins experiencing vivid dreams again, illustrating cannabis’s impact on overnight brain activity. Scientists note that THC and CBD may affect sleep differently and that the long-term consequences for brain health are still being explored, highlighting the complexity of cannabis’s effects on sleep and dreaming.