Cannabis Use Linked to Sleep Disruptions, Study Reveals
A new study suggests that cannabis consumption may impair sleep quality in middle-aged adults, challenging its reputation as a sleep aid.
New research points to a surprising link between cannabis use and poor sleep quality, challenging the assumption that it acts as an effective sleep aid. A recent study published in JAMA Network Open highlights that while many individuals associate cannabis with improved sleep, the reality may be quite different.
Study Overview
Conducted by Northwestern Medicine, the study analyzed data from 1,266 participants involved in the Coronary Artery Risk Development in Young Adults (CARDIA) study. This research spans nearly 35 years, beginning in 1985-86, tracking health trends in Black and white adults across the United States.
Participants’ cannabis use was meticulously monitored over the decades, with a focus on its impact as they entered middle age. To evaluate their sleep, participants wore wrist monitors for one week and completed sleep surveys, allowing researchers to juxtapose their perceptions of sleep with objective data.
Findings and Insights
According to the findings, individuals who recently used cannabis reported longer sleep durations, often exceeding eight hours. However, the use of wearable technology revealed concerning trends: those who consumed cannabis frequently experienced disrupted sleep patterns, including increased wake times during the night.
Dr. Thanh-Huyen T. Vu, the study's lead author, remarked, “Our research shows a contradiction to the common belief that cannabis aids sleep. Instead, there is evidence suggesting its use correlates with lower sleep quality, even though users may not recognize these changes.”
Greater cumulative cannabis consumption was tied to reduced sleep efficiency and more fragmented sleep. Notably, despite long-term cannabis users experiencing lower sleep quality, their subjective sleep ratings did not align with the objective data from sleep monitors.
Understanding the Implications
The research team controlled for several factors that typically affect sleep quality, including age, gender, race, physical activity, and pre-existing health conditions, establishing a clear correlation between cannabis use and sleep disruptions.
Dr. Mercedes R. Carnethon, a senior author of the study, stated, “As cannabis becomes more available and accepted, we need to better understand its long-term implications on sleep and overall health.”
It’s important to note that the study did not differentiate between various methods of cannabis consumption, such as smoking versus edibles, pointing to a need for future research to explore how these methods may impact sleep.
Alternatives for Better Sleep
If you're seeking to enhance your sleep quality, there are several tried-and-true strategies worth considering. Co-author Kristen L. Knutson suggests:
- Establish a consistent sleep routine with regular bedtimes.
- Create a bedroom environment that is cool, dark, and quiet.
- Avoid screen time from phones or computers at least an hour before bed.
- Engage in calming pre-sleep activities such as reading, meditating, or taking a warm shower.
For anyone struggling with sleep issues or persistent snoring, consulting with a healthcare provider for further evaluation can be beneficial.
Reference: “Recent and Cumulative Cannabis Use and Sleep in Middle-Aged Adults” by Thanh-Huyen T. Vu et al., JAMA Network Open, 9 October 2026. DOI: 10.1001/jamanetworkopen.2026.38303
