A compound found in cannabis may offer relief for nightmares linked to traumatic experiences, according to a recent study conducted by German researchers. The study focused on tetrahydrocannabinol (THC), the psychoactive ingredient in cannabis responsible for its characteristic “high.” Researchers found that more than half of the participants saw improvements in their nightmares after treatment with THC, with over a third reporting a complete disappearance of distressing dreams.

Nightmares are commonly associated with post-traumatic stress disorder (PTSD), which can develop after exposure to severe or terrifying events. These distressing dreams can significantly impair sleep quality and overall wellbeing. The study suggests THC may play a role in alleviating these symptoms by interacting with the body’s endocannabinoid system, which helps regulate sleep, stress responses, and emotional memory processing.

German psychotherapist Stefan Ropke, who contributed to the research, explained that THC’s effects on REM sleep—the phase when intense dreaming occurs and the brain processes emotional experiences—could be crucial. He noted that evidence indicates THC reduces dream activity during REM sleep, which may diminish nocturnal stress reactions and the occurrence of trauma-related nightmares.

While the findings point to potential therapeutic benefits of THC for those suffering from nightmare disorders, experts caution that further research is needed to fully understand the safety, optimal dosing, and long-term effects of cannabinoid treatments. The study’s results provide a promising avenue for developing new options to manage nightmares for individuals affected by PTSD and other trauma-related conditions.