Sleep disorders are a widespread problem often treated with disproportionately risky medications. Benzodiazepines are commonly prescribed but carry a very high risk of dependency and lead to rapid tolerance increases. Although most people are aware that cannabis has a sedative effect, its use as a sleep aid remains controversial in conventional medicine.
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Despite its medical approval since 2017, it continues to be portrayed as merely a last resort for the most severe illnesses. Recent published studies have again demonstrated that cannabis can be a highly effective and, importantly, non-addictive alternative to medications like benzodiazepines for common conditions such as sleep disorders.
12-Month Long-Term Study
A US study published in 2025 examined the long-term measurable effects of medical cannabis on sleep quality. 137 patients who were originally prescribed cannabis for another underlying condition but also suffered from sleep disorders participated in the study. One goal was to determine whether the method of administration also influenced sleep quality.
Sleep quality was assessed using a standardized scale at the beginning of the study and after three, six, nine, and twelve months. The Pittsburgh Sleep Quality Index (PSQI) was used for this purpose. This is a self-assessment questionnaire consisting of 19 questions that covers various aspects of sleep quality. In addition to sleep duration and sleep efficiency, it also captures sleep interruptions and daytime impairment.
The result: Cannabis led to rapid and significant improvement in sleep quality on the PSQI scale. The improvement occurred across all parameters measured in the PSQI scale. The greatest improvement was observed immediately after starting treatment and could not be further improved during the remaining observation period. However, there was also no decline in improvement. This suggests that cannabis provides rapid and sustained help against sleep problems and does not produce significant tolerance even with long-term use.
Method of Consumption Had No Impact on Sleep Quality
Interestingly, no effect on therapeutic efficacy was found between different consumption methods. The primary condition for which cannabis was originally prescribed also showed no statistically significant influence. However, the study did not specify the timing of inhalation or oral administration. The primary focus was on assessing the long-term effects of medical cannabis on sleep quality with continuous use.
British Study With Comparable Results
A British study published in 2025 independently reached the same conclusion. 124 patients taking medical cannabis for sleep disorders were observed over an 18-month period. Subjective changes in sleep quality were similarly assessed at regular intervals using self-assessment questionnaires. Here too, a significant improvement in all sleep parameters was evident at the beginning of treatment and was consistently maintained throughout the observation period.
Additionally, the study assessed the emotional well-being of participants. It was found that taking medical cannabis resulted in a reduction in anxiety and depression, which was attributed in part to significantly improved sleep. The majority of patients tolerated the treatment very well. Only 9% experienced mild side effects such as dry mouth. Tolerance increases and addictive behavior were negligibly low.
For comparison: Current estimates suggest that up to 1.5 million people in Germany are dependent on benzodiazepines. Approximately one in twenty German citizens receives a benzodiazepine or a closely related Z-drug prescription at least once a year, with sleep disorders being one of the most common indications. The study authors emphasize that cannabis can represent an alternative to addictive sleep medications and is also effective when conventional drugs fail.
Sources
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