Cannabis Is Promoted as a Sleep Aid. A New Study Raises Doubts.

Researchers found a link between cannabis use and more disrupted sleep, even when people’s own sleep ratings didn’t reflect it.

Does Cannabis Help You Sleep?

If you rely on cannabis to fall asleep, two questions matter: Is it helping you sleep well, and is your use becoming hard to control? Using cannabis for sleep does not by itself mean addiction. Cannabis use disorder involves difficulty stopping even when use is causing health or social problems, according to the Centers for Disease Control and Prevention.^[1]

A new study published October 9 in JAMA Network Open looks beyond how sleep feels. Among adults around age 61, cannabis use was associated with more disrupted sleep on wrist-worn monitors. The researchers did not find a corresponding association with how participants rated their own sleep.^[2]

Thanh-Huyen T. Vu, a research associate professor at Northwestern University Feinberg School of Medicine and the study’s lead author, explained the distinction in written comments to addictionhelp.com.

Vu wrote: “Objective sleep data comes from a device, such as the wrist-worn activity monitor used in our study. Subjective sleep data comes from participants’ reports of their sleep, including how long they slept and how rested they felt; these self-reports reflect how people perceive their own sleep, which may differ from what the device measures.”

The finding raises a useful question for anyone relying on cannabis at bedtime: does “helping me sleep” mean falling asleep more easily, staying asleep, or feeling better the next day? Those are different outcomes.

What the Cannabis Study Measured

Researchers used CARDIA, a long-running US study that began following Black and White young adults in 1985 and 1986. By the time sleep was measured in 2020–2022, participants were around age 61.^[2] The study was published this October, but its sleep observations are several years old.^[2]

Here is how the researchers looked at sleep:

• One week of wrist monitoring. For seven days, devices tracked total time asleep, how much of the sleep period was spent asleep, restlessness and time awake after first falling asleep.^[2]
• Participants’ own accounts. Sleep questionnaires captured how people described their sleep. The device analysis included 891 people, the questionnaire analysis included 1,128, and 753 were in both.^[2] These were overlapping groups, not identical samples.^[2]
• Cannabis use over time. Researchers compared sleep with recent use and estimated total cannabis exposure across the years of follow-up. People reporting medical cannabis use were excluded. The device group’s average age was 60.7.^[2]

More time asleep did not necessarily mean less interrupted sleep. People who reported cannabis use in the previous 30 days slept longer than people who had never used it, on average, but also spent more time awake during the sleep period after the researchers adjusted for other measured differences.^[2]

About 11 More Minutes Awake During the Night

The adjusted difference between recent and never users was about 11 additional minutes awake after first falling asleep. The study’s uncertainty range, called a 95% confidence interval, ran from about 6 to 16 minutes.^[2] That is time awake across the sleep period, not necessarily one uninterrupted stretch.^[2]

That number gives the finding a scale. It does not tell you that cannabis will add 11 waking minutes to your night, or establish how much that difference affected someone’s next day.

Vu was direct about the main limit: “Our study found an association, but not proof of cause and effect. Although longer histories of cannabis use were associated with more time awake during the night, we cannot conclude that cannabis use caused these sleep differences.”

The researchers accounted for factors including smoking, alcohol use, depressive symptoms and sleep medicines, but other influences could remain. Sleep was measured during one week, so the study could not establish how sleep changed over time or which came first, cannabis exposure or the sleep differences.^[2]

The study also lacked detailed information about product strength, how cannabis was taken and when it was used relative to sleep. It cannot tell you whether a particular gummy, dose or bedtime routine helps you.^[2]

Why Feeling Rested and Measured Sleep Can Differ

Think of “How was your night?” as several questions bundled into one. Was it easy to get to sleep? Did you wake up repeatedly? How did you feel the next morning? A person could give a different answer to each. A single overall rating cannot tell you which part they had in mind.

For example, imagine someone saying, “I slept until my alarm, so I think I slept well.” That tells you when the night ended, but not how continuous the sleep was.

Vu offered this interpretation of the findings: “Interestingly, participants did not report differences in their perceived sleep quality, even though the activity monitors detected differences in nighttime wakefulness. This suggests that people may not realize their sleep is being disrupted, even when a device can detect it.”

That possibility deserves attention without turning it into a verdict that people cannot trust their own experience. The National Heart, Lung, and Blood Institute’s insomnia assessment guidance asks about both nighttime patterns and how refreshed or tired a person feels. Actigraphy tracks rest and activity with a wrist-worn motion sensor. The device offers a different view of the night, while the person’s account describes how they feel and function.^[3]

Research in people using cannabis for medical conditions also needs its own context. The National Center for Complementary and Integrative Health notes that some studies find better sleep, but it can be unclear whether cannabis affects sleep directly or whether relief from another condition helps people sleep. Benefits in those patients do not automatically answer the question for someone without those conditions.^[4]

When Cannabis for Sleep Becomes Hard to Cut Back

The sleep study does not tell you whether you have an addiction. A more useful starting point is whether you are losing control over your use or continuing despite harm. CDC lists these among the signs of cannabis use disorder:

• Using more than you intended.^[1]
• Trying to quit but being unable to.^[1]
• Continuing despite problems with health, relationships, home or work.^[1]

Sleep problems and strange dreams can also be symptoms of cannabis withdrawal.^[5] Trouble sleeping after cutting back deserves help, but it does not by itself establish an addiction. Tell a clinician about both the sleep change and any difficulty controlling your use so they can assess the broader pattern.^[1]

If you use cannabis to quiet anxiety at bedtime, mention that too. CDC notes that cannabis can itself cause anxiety or paranoia.^[6] Describe what you feel before using, afterward and when you cut back. That gives a clinician a clearer picture without assuming that one problem explains everything.

What to Discuss if You Rely on Cannabis for Sleep

You do not need to turn this study into a diagnosis or buy a sleep tracker to begin describing what worries you. “I’m getting through the night, but I’m exhausted at work,” or “I’m afraid I won’t sleep if I don’t use cannabis” gives a clinician a more useful starting point than simply “My sleep is bad.”

NHLBI recommends talking to a clinician when insufficient sleep affects daily activities.^[3] These details can help you prepare:

• Describe the night and the next day. Keep a sleep diary for one or two weeks with bedtimes, waking times, naps and daytime sleepiness. Include habits such as caffeine or alcohol use.^[3]
• Explain what you use. Tell the clinician about cannabis, other substances, medicines and supplements. Be clear about what you hope cannabis helps with and what you actually notice.^[3]
• Ask about treating the insomnia itself. Cognitive behavioral therapy for insomnia, or CBT-I, works on sleep-related thoughts and habits. NHLBI describes it as the usual first treatment for long-term insomnia. It can help people fall asleep faster and stay asleep longer, and can be delivered in person, by phone or online.^[7]
• Say if changing your cannabis use feels difficult. “I’m afraid I won’t sleep if I stop” is worth bringing up. Ask how to address sleep problems while changing your use, and explain any attempts to quit that have not worked.^[5][1]

You deserve help with the sleep problem itself, including the part that makes change feel difficult. A useful next conversation can start with what you hope cannabis is doing, what you actually notice through the night and the next day, and what you would like to be different.

If you are in crisis or thinking about suicide, call 988 or text 988 in the United States.

Thanh-Huyen T. Vu supplied written comments to addictionhelp.com on October 13, 2026. She is the study’s lead author, not an independent commentator. The study reports public research funding, including NHLBI support for CARDIA and its sleep study. Its disclosures list NIH and Swiss National Science Foundation grants and no other reported conflicts. Independent practical context here comes from published NIH and CDC resources.