Why Using Cannabis to Sleep Can Backfire
A new University of Michigan study reveals that millions of young adults are using marijuana to fall asleep—but experts warn it may be quietly making their sleep worse.
The Growing Trend of Cannabis as a Sleep Aid
If you’ve ever used marijuana to help yourself fall asleep, you’re far from alone. New research from the University of Michigan, published in the prestigious journal JAMA Pediatrics, reveals just how common this practice has become among young Americans.
The study, funded by the National Institute on Drug Abuse, surveyed 1,473 young adults ages 19 to 30. The findings are striking: cannabis is now the go-to substance for sleep problems, far outpacing alcohol.
But here’s where the research takes a concerning turn: while cannabis may help you drift off faster initially, scientists say it could be quietly sabotaging your sleep quality—and potentially setting you up for bigger problems down the road.
“Using these substances to get to sleep can backfire because they can interfere with the ability to stay asleep and with the quality of sleep. They appear to actually disrupt sleep in the long term. The fact that so many young adults reported that they use cannabis to sleep is alarming.”— Dr. Megan Patrick, Research Professor, University of Michigan Institute for Social Research
How Cannabis Actually Affects Your Sleep
While marijuana may seem like a natural sleep aid, the science tells a more complicated story.
Short-Term: Faster Sleep Onset
THC can help you fall asleep faster initially. This is why many people believe cannabis “works” for sleep. Some studies show it may increase deep slow-wave sleep in the short term.
Reduced REM Sleep
THC decreases REM (rapid eye movement) sleep—the stage essential for memory consolidation, emotional processing, and mood regulation. Less REM means fewer dreams but also impaired cognitive recovery.
Long-Term: Sleep Quality Declines
Chronic cannabis users often experience decreased total sleep time, longer time to fall asleep, worse sleep efficiency, and more nighttime awakenings compared to non-users.
Tolerance & Dependence
Regular use leads to tolerance—needing more cannabis to achieve the same sleep effect. This can escalate use and lead to dependence, where you can’t sleep without it.
⚠️ The Cycle That Makes Things Worse
Dr. Patrick warns that using cannabis for sleep can create a self-reinforcing cycle:
- Tolerance develops: You need more cannabis to get the same sleep effect
- Sleep quality declines: Even with cannabis, sleep becomes fragmented and less restorative
- Withdrawal worsens insomnia: Trying to stop causes rebound sleep problems, leading many back to cannabis
- Substance use escalates: What started as occasional use becomes nightly dependence
“Rather than resulting in better sleep, it may lead to additional sleep problems and escalating substance use,” Patrick explains.
Who Is Using Cannabis for Sleep?
The study revealed significant differences in who turns to substances for sleep help:
Women were almost twice as likely as men to use cannabis for sleep
People identifying as another gender were more than 4x as likely as men to use cannabis for sleep
Black young adults were 3x more likely than white young adults to use alcohol as a sleep aid
What Happens When You Try to Stop
Sleep disturbances are one of the most common and severe symptoms of cannabis withdrawal:
The Misconception That Keeps People Stuck
One of the biggest challenges is that many young adults genuinely believe cannabis is helping their sleep. And in the short term, it might seem that way—falling asleep faster can feel like success.
But as Dr. Patrick emphasizes: “Unfortunately, there is a misconception that substance use can be helpful for sleep problems, but it can make things worse.”
The research is clear that while cannabis may reduce the time it takes to fall asleep initially, chronic use is associated with:
- Decreased total sleep time
- Reduced slow-wave (deep) sleep over time
- Disrupted sleep architecture
- Increased sleep fragmentation (waking up during the night)
- Worse subjective sleep quality
“High-quality sleep is critical for mental health and regulating mood,” Patrick notes. “Young adults told us that they are using cannabis to try to get to sleep, but doing so may make their sleep problems even worse. They need to know the potential risks.”
Healthier Alternatives for Sleep Problems
If you’re struggling with sleep, there are evidence-based approaches that don’t carry the risks of substance use:
✓ CBT-I (Cognitive Behavioral Therapy for Insomnia)
The gold standard treatment for chronic insomnia. Works by addressing thoughts and behaviors that interfere with sleep—with lasting results.
✓ Sleep Hygiene Improvements
Consistent sleep schedule, cool dark room, limiting screens before bed, avoiding caffeine late in the day, and regular exercise.
✓ Relaxation Techniques
Progressive muscle relaxation, deep breathing exercises, meditation, and guided imagery can reduce the anxiety that often underlies sleep problems.
✓ Address Underlying Conditions
Anxiety, depression, PTSD, and chronic pain often cause sleep problems. Treating the root cause leads to better, more sustainable sleep.
Dr. Patrick’s advice: “People who are trying to manage sleep problems should talk to their doctors or other providers.” A healthcare professional can help identify underlying causes and recommend appropriate treatment—without the risks of self-medicating with substances.
Concerned About Your Cannabis Use?
If you’ve been using cannabis regularly to sleep and are worried about dependence, or if you’re struggling with substance use affecting other areas of your life, we’re here to help.
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