Most people have become are using cannabis to solve their sleep problems. However, heavy use of cannabis has negative effects on the sleep-wake cycle.
Highlights:
Heavy use of cannabis can lead to extremes of nightly sleep duration, that is, sleeping either less than 6 hours or more than 9 hours, reveals a new study of a large representative sample of US adults.
The study was published online in the journal Regional Anesthesia & Pain Medicine.
This pattern was even more pronounced among heavy users—those using on 20 out of the previous 30 days, the findings show. - Cannabis users tend to either sleep more than 9 hours or less than 6 hours
- Sleep disruption is seen more among heavy cannabis users
- Heavy cannabis users are those who use 20 or more out of the preceding 30 days
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‘Most people have become are using cannabis to solve their sleep problems. However, heavy use of cannabis has negative effects on the sleep-wake cycle.’
Cannabis use in North America continues to increase, with around 45 million adults in the USA reporting this in 2019, which is double the figure reported in the early 2000s. This change has partly been driven by widespread decriminalization in many states over the past decade, as well as research suggesting that cannabinoids may have therapeutic value for pain relief and possibly anxiety and sleep disorders as well, say the researchers.
Cannabis has become popular as a sleep aid, particularly as the prevalence of sleep deprivation and insomnia has increased.
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Details of the Study
The researchers wanted to see if cannabis use might be linked to nightly sleep duration in a nationally representative sample of US adults (aged 20 to 59) who had taken part in the biennial National Health and Nutrition Examination Survey (NHANES) for the years 2005 to 2018 inclusive.
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Survey respondents were characterized as recent or non-users if they had or hadn’t used cannabis in the past 30 days. Sleep duration was defined as short (less than 6 hours), optimal (6 to 9 hours), and long (more than 9 hours).
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Results of the Study
Some 25,348 people responded to the surveys between 2005 and 2018, but the final analysis is based on 21,729 who answered all the questions, representing an estimated 146.5 million US adults.
The average nightly sleep duration was just short of 7 hours across the entire sample. Some 12% reported less than 6 hours, while 4% reported more than 9 hours a night.
A total of 3,132 (14.5%) respondents said they had used cannabis in the preceding 30 days. Recent users were more likely to report not sleeping enough or sleeping too much.
They were 34% more likely to report short sleep and 56% more likely to report long sleep than those who hadn’t used cannabis in the preceding 30 days, after accounting for potentially influential factors.
And they were also 31% more likely to report difficulty falling asleep, staying asleep, or sleeping too much in the preceding 2 weeks, and 29% more likely to have discussed a sleeping problem with a doctor. But recent cannabis use wasn’t associated with frequent daytime sleepiness.
Further analysis of the frequency of cannabis use revealed that moderate users, defined as using on fewer than 20 out of the past 30 days, were 47% more likely to sleep 9 or more hours a night compared with non-users.
Heavy users, defined as using on 20 or more out of the preceding 30 days, were 64% more likely to experience short sleep and 76% more likely to experience long sleep compared with non-users.
These findings differed little across the survey years.
This is an observational study, and as such, can’t establish cause, or reverse causality, for that matter.
The researchers also point to several study limitations, including the reliance on self-reported data and the lack of information on cannabis dose. The historical and the historical and ongoing stigma associated with cannabis use may also have affected the responses to questions about cannabis use, they suggest.
But they say: “Increasing prevalence of both cannabis use and sleep deprivation in the population is a potential cause for concern.”
“Despite the current literature demonstrating mixed effects of cannabis and various cannabinoid formulations on sleep architecture and quality, these agents are being increasingly used as both prescribed and unprescribed experimental therapies for sleep disturbances.”
They add: “Our findings highlight the need to further characterize the sleep health of regular cannabis users in the population...Sleep-wake physiology and regulation is complex and research about related endocannabinoid pathways is in its early stages.”
Source-Eurekalert
