Sleep Disorders and Substance Use Interactions

Sleep disorders and substance use disorders frequently co-occur and interact in complex, bidirectional ways. Substances such as alcohol, nicotine, cannabis and stimulants can acutely alter sleep architecture, leading to reduced slow-wave and REM sleep, fragmented rest and shifts in circadian timing. Chronic use and periods of abstinence tend to exacerbate these disturbances, perpetuating cycles of craving, relapse and daytime dysfunction. Underlying mechanisms involve dysregulation of neurotransmitter systems, altered stress-hormone release and inflammatory pathways. Clinically, poor sleep both predisposes individuals to initiate substance use and undermines treatment outcomes, making sleep a critical therapeutic target in recovery programmes worldwide.

Research from Nature Portfolio

Large-scale population analysis of older adults has shown that prolonged hazardous alcohol consumption is associated with increased frequency of nocturnal awakenings and non-restorative sleep. Patterns of heavy or unstable drinking sustained over decades correlate with persistent insomnia symptoms, particularly among men, underscoring the long-term impact of alcohol on sleep continuity. In parallel, a randomised clinical trial assessed the efficacy of nightly melatonin in treatment-seeking individuals with alcohol use disorder. Although both melatonin and placebo groups exhibited modest improvements in subjective sleep quality over four weeks, there was no significant difference between interventions, indicating that alternative dosing regimens or combined behavioural approaches may be necessary to ameliorate alcohol-related sleep disturbances.

Sleep Disorders and Substance Use Interactions publication trend

The graph below shows the total number of articles in sleep disorders and substance use interactions across all publications each year (not limited to Nature Index journals).

Technical terms

Insomnia: A sleep disorder marked by persistent difficulty initiating or maintaining sleep, accompanied by daytime impairment.

Mendelian randomisation: A genetic epidemiology technique using inherited variants as proxies to infer causal relationships between an exposure and an outcome.

Resting-state functional connectivity: A measure of spontaneous synchronisation between brain regions during wakeful rest, reflecting network integrity.

Pro-inflammatory cytokines: Signalling proteins, such as interleukin-8 and MCP-1, that mediate inflammatory responses and influence neurobiological functions.

Alcohol use disorder (AUD): A clinical diagnosis characterised by problematic patterns of alcohol consumption causing significant distress or functional impairment.

References

1. Sleep abnormalities associated with alcohol, cannabis, cocaine, and opiate use: a comprehensive review. Addiction Science & Clinical Practice (2016).
2. Drugs, sleep, and the addicted brain. Neuropsychopharmacology (2019).
3. The association between alcohol consumption and sleep disorders among older people in the general population. Scientific Reports (2020).
4. Causal relationships between substance use and insomnia. Drug and Alcohol Dependence (2020).
5. Reduced resting‐state functional connectivity and sleep impairment in abstinent male alcohol‐dependent patients. Human Brain Mapping (2019).
6. An exploratory study of pro-inflammatory cytokines in individuals with alcohol use disorder: MCP-1 and IL-8 associated with alcohol consumption, sleep quality, anxiety, depression, and liver biomarkers. Frontiers in Psychiatry (2022).
7. Melatonin for Treatment-Seeking Alcohol Use Disorder patients with sleeping problems: A randomized clinical pilot trial. Scientific Reports (2020).