Researchers published a literature review that investigates the relationship between cannabis and sleep. They examined six major sleeping disorders: insomnia, sleep apnea, REM behavior disorder, nightmares, sleep with chronic pain, and daytime sleepiness.
They found that THC might worsen daytime sleepiness and delayed onset of sleep; however, THC might help patients who suffer from sleep apnea and nightmares. Meanwhile, CBD might reduce daytime sleepiness and insomnia while increasing the total amount of sleep.
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