How THC and CBD Affect Sleep: A Controlled Study with Brain Wave Monitoring ↗
Sleep study finding 15 mg THC was sedating while 15 mg CBD had alerting properties and counteracted THC sedation, with EEG showing CBD increased wakefulness during sleep.
Sleep research
Explore published research on sleep, including study methods and limitations.
Cannabis-Based Spray Significantly Reduced MS Central Pain and Sleep Problems in Rigorous Trial ↗
Randomized trial of 66 MS patients found THC:CBD spray significantly reduced central neuropathic pain (P = 0.005) and sleep disturbance (P = 0.003) with 97% completion rate.
Clinical Experience: 15 of 20 Chronic Pain Patients Reported Improvement With Synthetic Cannabinoid Nabilone ↗
Clinical case series of 20 chronic pain patients found 75% reported improvement with nabilone, with sleep and nausea benefits being the primary reasons for continued use.
Stopping Heavy Cannabis Use Was Linked to Poorer Sleep. The Second Night Looked Worse. ↗
In the first 48 hours after stopping heavy cannabis use, lab sleep was shorter, lighter, and more fragmented, with bigger gaps versus controls on night two.
How Cannabis, Cocaine, and Ecstasy Each Affect Sleep Differently ↗
Review found cannabis acutely helps sleep onset and deepens sleep but withdrawal causes insomnia and vivid dreams, while cocaine and ecstasy primarily disrupt sleep through arousal.
What Heavy Teen Marijuana Use Was Linked To: Slower Thinking, Subtle Brain Differences, and Poorer Sleep ↗
Heavy teen marijuana use was linked to modest cognitive disadvantages, subtle brain differences, and poorer sleep. Some changes persisted past a month and sometimes resolved by three months of abstinence.
Nabilone was better than amitriptyline for improving sleep in fibromyalgia patients ↗
Crossover RCT of 29 fibromyalgia patients found nabilone improved sleep quality more than amitriptyline, though neither affected pain in two-week treatment periods.
New Cannabis Withdrawal Scale developed: nightmares were most diagnostic, angry outbursts caused the most distress ↗
The Cannabis Withdrawal Scale was developed with excellent reliability, revealing nightmares as the most diagnostic symptom and angry outbursts as the most distressing.
Fibromyalgia patients who used cannabis reported significant pain and stiffness relief within 2 hours ↗
Fibromyalgia cannabis users reported significant pain and stiffness relief within 2 hours and better mental health scores compared to non-users.
Three Nights Without Cannabis Disrupted Sleep. Extended-release Zolpidem Blunted Much of It. ↗
Three nights off cannabis cut sleep efficiency and total sleep time and shifted REM. Extended-release zolpidem restored efficiency but did not shorten time to fall asleep.
How heavy cannabis users actually smoke: first puffs are most intense, and intensity predicts withdrawal severity ↗
Objective measurement of cannabis smoking showed front-loaded puffing and dose-dependent prediction of withdrawal severity, especially sleep disruption.
Cannabis Extract Nearly Doubled the Rate of Muscle Stiffness Relief in Multiple Sclerosis ↗
Phase III trial found oral cannabis extract nearly doubled muscle stiffness relief compared to placebo in 279 MS patients, with benefits for pain and sleep.
Systematic Review: What CBD Does (and Does Not) Do in Humans ↗
Systematic review of 34 human studies found preliminary CBD benefits for anxiety, insomnia, and epilepsy, with complex THC interactions depending on delivery route.
Veterans With Poor Sleep Quality Had Less Success Reducing Cannabis Use During Quit Attempts ↗
Veterans with poor perceived sleep quality reduced their cannabis use less during a 6-month quit attempt, even after accounting for PTSD and withdrawal.
Quetiapine Helped Cannabis Withdrawal Sleep and Appetite but Increased Craving and Relapse ↗
Quetiapine improved sleep and appetite during cannabis withdrawal but increased craving and use during the relapse phase, disqualifying it as a dependence treatment.
Marijuana Use Was Linked to Inattention in Men and Poor Sleep in Women With ADHD ↗
In 76 adults with ADHD, marijuana use correlated with inattention in men and poor sleep quality in women, suggesting sex-specific effects.
Sleep problems and substance use disorders fuel each other in both directions ↗
Review found sleep disturbance and substance use disorders reinforce each other, with cannabis withdrawal showing objective sleep disruption and insomnia treatment identified as a gap.
39 Studies Later, the Evidence That Cannabis Helps You Sleep Is Weaker Than You Think ↗
Systematic review of 39 human studies found mixed cannabinoid effects on sleep and study quality too uneven for clear answers.
Cannabis withdrawal symptoms peaked in days 0-3 but sleep problems got worse over time ↗
During monitored cannabis abstinence, most withdrawal symptoms peaked in days 0-3 and improved, but sleep disturbance and strange dreams got progressively worse over time.
THC/CBD Spray Helped Some Patients with Treatment-Resistant Nerve Pain ↗
RCT of 246 neuropathic pain patients found THC/CBD spray achieved significant 30% pain response rates (p=0.034) and improved sleep quality versus placebo.
One in Five Canadians With MS Uses Cannabis, and Half Would Use It If Legal ↗
A survey of 225 Canadian MS patients found 19.5% currently use cannabis (mainly for sleep, pain, anxiety, spasticity), with half saying they would use if legal.
Systematic Review Confirms Cannabis Withdrawal Disrupts Sleep, but Specific Mechanisms Remain Unclear ↗
A systematic review of 36 human studies confirmed that sleep disruption is a consistent feature of cannabis withdrawal, but methodological differences between studies prevented clear conclusions about which specific aspects of sleep are most affected.
Combining a Sleep Aid With a THC Pill Reduced Cannabis Withdrawal Symptoms and Relapse in a Lab Setting ↗
An inpatient study found that combining the sleep aid zolpidem with the synthetic THC pill nabilone reduced cannabis withdrawal symptoms and decreased cannabis self-administration more than zolpidem alone.
The Endocannabinoid System Keeps Sleep Stable But Does Not Drive the Need to Sleep ↗
Animal research shows the endocannabinoid system stabilizes NREM sleep bouts but does not drive the homeostatic need to sleep, helping explain cannabis's complex effects on sleep.
Why Quitting Cannabis Wrecks Your Sleep — and Why It Gets Better ↗
Review of cannabis and sleep research through 2017 found CBD promising for insomnia, THC mixed (faster onset but worse quality), and the whole field still in its infancy.
Parkinson's patients reported significant improvements in falls, pain, depression, tremor, and sleep with medical cannabis ↗
Survey of 47 Parkinson's patients found large self-reported improvements in falls, pain, and tremor with medical cannabis, but 17% experienced confusion or hallucinations.
How Cannabis Use Patterns Differ by Age Among Medical Dispensary Patients ↗
Dispensary study of 217 patients finding younger medical cannabis users consume more and show more problematic use than older users, with early initiation as a key risk factor.
Reducing Cannabis Use Improved Anxiety, Depression, and Sleep But Not Overall Quality of Life ↗
Study of 302 adults finding that reducing cannabis use over 12 weeks improved anxiety, depression, and sleep quality but not overall quality of life, with effects independent of other substance use changes.
Could the Endocannabinoid System Influence Your Dreams? ↗
Review proposing that the endocannabinoid system influences dream activity, supported by its known roles in consciousness, emotion, and sleep, and by preliminary evidence of cannabinoid-related nightmare reduction in PTSD.
A Compound That Boosts Anandamide and Blocks TRPV1 Promoted Sleep in Rats ↗
Rat study showing AA-5-HT (dual FAAH/TRPV1 blocker) promoted sleep during active periods, restored sleep after deprivation, and blocked the wake-promoting effects of CBD and modafinil.
Why Recreational Drugs Including Cannabis Damage Well-Being Through the Same Core Mechanism ↗
Review arguing that cannabis and stimulant drugs damage well-being through the same core mechanism: cyclical mood disruptions that chronically stress the body's hormonal and neurological systems.
Most Medical Cannabis Patients Reported Reducing Their Use of Opioids, Sleep, and Anxiety Medications ↗
Survey of 1,513 medical cannabis patients found over 75% reduced opioid use and 65-72% reduced sleep and anxiety medications, though their primary care doctors often did not know.
Cannabis for PTSD: Promising Biology, Very Little Proof It Actually Works as Treatment ↗
The biology linking the endocannabinoid system to PTSD was strong, but clinical evidence for cannabis as treatment was weak. Nabilone showed real promise for nightmares specifically.
94% of fibromyalgia patients who used cannabis reported pain relief, though most were not medically licensed ↗
Israeli survey of 383 fibromyalgia patients found 84% used cannabis with 94% reporting pain relief, though only 44% were medically licensed and most smoked rather than using other methods.
All 26 fibromyalgia patients improved on every measure after starting medical cannabis, with half stopping other medications ↗
Small study of 26 fibromyalgia patients found all improved on every measure after medical cannabis, with 50% stopping all other medications and only mild adverse effects in 30%.
70% of people with spinal cord or brain injuries used cannabis before injury, and about half continued after ↗
Colorado survey found 70% of SCI/TBI patients used cannabis before injury and 48% after, with spasticity reduction (SCI) and recreation/stress relief (TBI) as primary reasons.
A survey of 455 medical cannabis patients found strain preferences were highly dispensary-specific, with many using sativa by day and indica at night ↗
Survey of 455 medical cannabis patients found 1,987 strains available, with preferences highly dispensary-specific and many patients using sativa by day and indica at night.
Cancer patients in Minnesota's medical cannabis program reported significant symptom improvement across the board ↗
Cancer patients in Minnesota's medical cannabis program reported significant improvement across all 8 tracked symptoms, with 27-50% achieving lasting clinically meaningful reductions and only 10.5% reporting side effects.
Most adult-use dispensary customers reported using cannabis for pain or sleep and cutting back on other medications ↗
A survey of 1,000 Colorado recreational dispensary customers found 65% used cannabis for pain and 74% for sleep, with most reporting they reduced or stopped using other medications including opioids.
Colorado sleep aid sales dropped sharply when recreational cannabis dispensaries opened nearby ↗
Colorado grocery store data shows OTC sleep aid sales dropped sharply after recreational dispensaries opened, with a 236% trend reversal driven by substitution away from antihistamine-based sleep products.
Half of Danish MS patients have used cannabis, mostly illegally, reporting high efficacy for pain and spasticity ↗
Largest MS cannabis survey finds 49% of 2,009 Danish patients have used cannabis, mostly illegally, reporting high efficacy for pain and spasticity with mild side effects, while 44% of non-users would consider it if legalized.
Vaporized THC and sleep in rats: only a 1-hour NREM bump at top dose ↗
Rats showed more NREM sleep only for 1 hour after the highest vaporized THC dose, only in the light phase.
Cannabis for PTSD in 2019: The Systematic Evidence Was Still Thin Despite Growing Interest ↗
Systematic review of cannabis for PTSD through 2019 found promising signals for nabilone and nightmares, but most evidence remained low-quality and the broader case unproven.
Adding medical cannabis to fibromyalgia treatment improved sleep and reduced other pain medications ↗
Observational study of 102 fibromyalgia patients found adding medical cannabis improved sleep in 44%, overall symptoms in 33%, and allowed 47% to reduce other pain medications over 6 months.
Systematic review finds cannabinoids may help PTSD symptoms, especially sleep and nightmares, but evidence is low quality ↗
Systematic review of 10 studies found cannabinoids may reduce PTSD symptoms, especially sleep disturbances and nightmares, but all evidence was of low quality with only one controlled trial.
Low-dose CBD hemp extract improved HDL cholesterol but had limited other effects ↗
Six-week RCT of 65 overweight adults found 15mg daily CBD hemp extract significantly improved HDL cholesterol, with trends toward better sleep and stress coping.
Adolescent cannabinoid exposure caused lasting sleep changes into adulthood in rats ↗
Rats exposed to cannabinoid agonist during adolescence showed persistent sleep disruption in adulthood, with decreased wakefulness and increased REM sleep.
What could CBD do for athletes? A review of the evidence ↗
Review found preclinical evidence for CBD benefits relevant to athletes (pain, inflammation, anxiety), but no studies have directly tested CBD in athletic populations.
First clinically-focused systematic review found CBD promising for social anxiety and possibly schizophrenia, but evidence is embryonic ↗
First clinically-focused systematic review found CBD tentatively supported for social anxiety and adjunctive schizophrenia, with high-THC showing no depression benefit.
Systematic review found insufficient evidence for cannabinoids as sleep treatments, but promising leads for several disorders ↗
Systematic review of 26 studies found insufficient evidence for cannabinoids as routine sleep treatments but promising leads for sleep apnea, insomnia, and PTSD nightmares.
Children exposed to cannabis before birth had more sleep problems at ages 9-10 ↗
Among nearly 12,000 children in the ABCD Study, prenatal cannabis exposure was associated with multiple sleep disturbances at ages 9-10, even after controlling for other prenatal exposures.
First 129 UK medical cannabis patients showed improved quality of life at 1 and 3 months ↗
The first 129 patients in the UK Medical Cannabis Registry showed significant improvements in anxiety, sleep, pain, and quality of life at 1 and 3 months, with 24% reporting adverse events.
Adults with ADHD symptoms experienced more daily cannabis consequences, especially around sleep use ↗
Daily diary study of 62 cannabis users found those with more ADHD symptoms experienced more daily cannabis consequences, with boredom and sleep motives increasing problems further.
Medical cannabis reduced pain and improved sleep across rheumatology conditions ↗
Survey of 319 rheumatology patients found self-reported pain reductions of 57-83% and sleep improvements of 71-87% with medical cannabis, with neuropathic pain patients reporting the greatest benefit.
CBD significantly reduced abnormal brain electrical activity and improved sleep in children with epilepsy ↗
Prospective study of 35 children with drug-resistant epilepsy found CBD cut abnormal brain discharges nearly in half and improved sleep microstructure in 85% of those with initial sleep abnormalities.
Daily cycling exercise improved sleep during inpatient cannabis withdrawal ↗
A randomized trial found daily moderate-intensity cycling during inpatient cannabis withdrawal improved objective sleep duration and efficiency compared to stretching, though participants did not perceive the difference.
Cannabis and Sleep: THC May Promote Deep Sleep, but the Picture Changes With Dose, Strain, and Delivery Method ↗
Review of whole-plant cannabis and sleep found effects depend on dose, strain, and delivery — with vaporized high-THC cannabis promoting deep sleep in animals.
Are low-dose cannabis oils safe and effective for MS symptoms? ↗
Prospective study of 28 MS patients finds low-dose cannabis oils (4 mg THC, 7 mg CBD) significantly reduce pain, spasticity, and sleep problems without impairing function.
Veterans with ADHD Symptoms Use Cannabis Mainly for Sleep, but Coping Use Leads to Problems ↗
Prospective study of 361 veterans found sleep problems drove ADHD-related cannabis use, while using cannabis to cope with negative emotions predicted cannabis-related problems.
Medical cannabis for chronic pain was linked to reduced pain, anxiety, and improved sleep over 3 months ↗
Prospective study of 46 adults using real-time smartphone assessments found medical cannabis reduced pain intensity, anxiety, depression, and improved sleep over 3 months.
Most older adults using cannabis started after age 60 and used it primarily for pain and sleep ↗
Survey of 568 adults 65+ found 15% used cannabis, with most starting after 60 for medical purposes (mainly pain), yet only 41% told their healthcare provider.
Survey of 258 perimenopausal and postmenopausal women finds 79% using cannabis for menopause symptoms, especially sleep and anxiety ↗
A survey of 258 menopausal women found 79% using cannabis for symptoms, most commonly sleep and anxiety, with perimenopausal women reporting worse symptoms and more anxiety-motivated use.
Cannabis-based medicines improved quality of life for autism patients in UK registry ↗
UK registry data showed 74 ASD patients had significant improvements in quality of life, sleep, and anxiety after starting cannabis-based medicines.
Cognitive behavioral therapy for insomnia improved sleep, mood, and reduced cannabis use ↗
Pilot study showed CBT for insomnia resolved sleep problems in cannabis users, with 80% reducing cannabis use at 3 months and sustained improvements in mood.
THC withdrawal in mice disrupts dopamine, sleep, and behavior, especially in males ↗
THC withdrawal in mice disrupted dopamine release, sleep patterns, and behavior in ways that mirror human withdrawal, with more pronounced effects in males.
Comprehensive review finds cannabis has minimal to no benefit for sleep disorders ↗
Cannabis products showed minimal to no benefit for sleep disorders in this review, and cannabis withdrawal itself causes significant insomnia that can drive relapse.
Medicinal Cannabis for Sleep Disorders: Where Does the Evidence Actually Stand? ↗
Despite widespread use, clinical evidence doesn't yet support cannabis as a reliable treatment for insomnia, sleep apnea, or other specific sleep disorders — but early results are promising.
Cannabis Use Did Not Interfere with Cognitive Behavioral Therapy for Insomnia ↗
In young adult binge drinkers with insomnia, cannabis use during CBT-I treatment did not reduce therapy effectiveness, with virtually zero moderation effect on outcomes.
Treating Cannabis Dependence Improved Depression, Sleep, and Pain Even Without Full Abstinence ↗
In a cannabis dependence trial, depression, anxiety, insomnia, and pain all improved over 12 weeks regardless of medication type, and even without complete abstinence from cannabis.
CBD-Melatonin Compound Improved Sleep, Anxiety, and Pain in Small Pilot Study ↗
Small pilot study of 20 patients found a CBD-melatonin sublingual compound improved sleep quality, reduced anxiety, and decreased pain over 3 months, but lacked a control group.
First Survey of CBG Users: Most Reported It Worked Better Than Conventional Medications ↗
First CBG patient survey found users reported it effective for anxiety (51%), pain (41%), and depression (33%), with 74-80% rating it superior to conventional medications and 44% reporting no side effects.
Nearly Two-Thirds of Canadian MS Patients Have Tried Medical Cannabis ↗
Survey of 344 Canadian MS patients found 65% had tried medical cannabis, primarily for sleep (84%), pain (80%), and spasticity (68%). 74% learned about it outside the healthcare system.
CBD-rich cannabis did not improve sleep better than placebo in children with autism ↗
Placebo-controlled trial of 150 children with autism found CBD-rich cannabis treatment was not better than placebo for any aspect of sleep.
Young cannabis users experienced withdrawal symptoms that peaked in the first week of quitting ↗
Study of 79 young people found cannabis withdrawal symptoms peaked in the first week of monitored abstinence then declined, with mood and sleep most affected.
Large Australian registry showed medicinal cannabis was safe and effective for at least two years ↗
Australian registry of 3,961 patients found medicinal cannabis was safe and showed sustained improvements in pain, mental health, and insomnia over 2+ years.
CBD Shows Therapeutic Benefits Starting at 300 mg, With Strongest Evidence for Anxiety and Addiction ↗
Review found CBD therapeutic effects emerge at 300+ mg/day, with best evidence for anxiety and addiction. Most OTC products fall below this threshold.
Mice Showed Sleep Disruption After Stopping Cannabinoid Treatment ↗
Mouse study found cannabinoid cessation reduced sleep during normal sleep periods, providing an animal model for human cannabis withdrawal sleep disturbance.
Teens quitting cannabis experienced a brief sleep disruption that resolved within two weeks ↗
RCT found adolescents who quit cannabis experienced trouble falling asleep during the first week, but sleep returned to normal by week two and stayed there through week four.
No high-quality evidence supports cannabis for anxiety, depression, or insomnia in cancer patients ↗
MASCC systematic review of 15 RCTs found no high-quality evidence for cannabis treating anxiety, depression, or insomnia in cancer, though sleep showed some promise.
How Older Adults Use Cannabis for Sleep: Patterns from a Geriatrics Clinic ↗
Geriatrics clinic survey found elderly cannabis users treating sleep problems prefer THC over CBD, use daily, and take it right before bed — often without clinician guidance.
What New Medical Cannabis Patients Say After One Month: Most Report It Helps Their Chronic Pain ↗
After one month, 63% of new medical cannabis patients reported effective pain relief, plus reduced medication use, less anxiety, and better sleep — though finding the right product was a common struggle.
A Cannabis Oil With THC and CBD Improved Sleep in 60% of Insomnia Patients in a Placebo-Controlled Trial ↗
Placebo-controlled crossover trial found THC/CBD cannabis oil helped 60% of insomnia patients no longer qualify as clinical insomniacs, with increased melatonin and sleep duration.
CBD Extended Sleep Duration in Rats but Disrupted Sleep Oscillations Needed for Complex Memory Consolidation ↗
CBD extended sleep in rats but disrupted sleep oscillations critical for memory, impairing complex memory consolidation while leaving simple memory intact.
Cannabis for Gynecological Pain: Growing Patient Use, Limited Clinical Evidence ↗
Women increasingly use cannabis for endometriosis, pelvic pain, and period cramps, with retrospective data suggesting benefit — but clinical trials are nearly nonexistent and barriers to medical access persist.
Fibromyalgia patients who slept better and felt less anxious on medical cannabis also reported less pain ↗
12-month study of 323 fibromyalgia patients found medical cannabis reduced pain partly through improvements in sleep and anxiety/depression symptoms.
Prenatal cannabis exposure weakened the protective effect of sleep on kids' behavior problems ↗
ABCD Study analysis of ~10,000 children found sleep protects against behavior problems, but prenatal cannabis exposure significantly weakened this protective effect.
A hemoglobin-derived peptide promoted deep sleep through the CB1 cannabinoid receptor in mice ↗
Mouse study found a hemoglobin-derived peptide promoted deep sleep through CB1 cannabinoid receptors, revealing new endocannabinoid sleep regulation pathways.
Trouble sleeping had opposite effects on cannabis use at daily vs. person levels in youth ↗
Study found youth with more sleep trouble used more cannabis overall, but on specific bad-sleep nights, they were actually less likely to use the next day.
Cannabis use for sleep and stress by veterans may create a cycle that worsens both problems ↗
Longitudinal study of 1,105 veterans found a self-reinforcing cycle: insomnia increased stress, stress increased cannabis use, and cannabis use worsened both stress and insomnia, challenging its use as a sleep or stress remedy.
Children with later bedtimes and less sleep were more likely to try marijuana by age 15 ↗
A national birth cohort study found later bedtimes and shorter sleep in childhood predicted higher odds of trying marijuana by age 15.
Nearly 1 in 4 Opioid Addiction Patients Use CBD — Mostly for Anxiety, Pain, and Sleep ↗
Survey of 550 opioid addiction patients found 23% use CBD — primarily for anxiety, pain, and sleep, with 42% using it specifically for withdrawal relief.
Sleep medication helped cannabis users sleep during early withdrawal but did not significantly boost quit rates ↗
A 12-week RCT found zolpidem prevented early cannabis withdrawal sleep disturbance but did not significantly increase quit rates (27% vs 15%), with sleep problems returning after medication stopped.
College Students With ADHD Have Worse Sleep and More Alcohol Consequences ↗
College drinkers with ADHD had worse sleep and more alcohol-related consequences, but ADHD did not increase cannabis-related negative outcomes.
Cannabis users curbed their demand when imagining driving but not in typical use settings ↗
Cannabis users showed reduced demand when imagining driving but increased demand in sleep contexts with cannabis cues, suggesting safety concerns can override drug motivation.
Evening chronotype and cannabis use disorder both independently predicted earlier mood symptom onset in bipolar disorder ↗
Evening chronotype and cannabis use disorder independently predicted earlier bipolar mood symptom onset, suggesting circadian rhythm disruption may underlie both conditions.
One in six Canadian adults uses cannabis for sleep, with young adults and men most likely to reach for it ↗
National Canadian survey finds 15.6% of adults use cannabis for sleep, surpassing prescription medication use, with young men most likely to choose cannabis.
UK medical cannabis patients with MS reported improved quality of life across multiple domains over six months ↗
UK registry data from 141 MS patients found prescribed cannabis products improved quality of life across cognitive, physical, emotional, and social domains over six months.
Nearly Half of Fibromyalgia Patients at Mayo Clinic Had Used Cannabis for Symptoms ↗
Mayo Clinic survey of 1,336 fibromyalgia patients found nearly half used cannabis, primarily for pain (82% reported improvement), fatigue, anxiety, and insomnia.
Medicinal Cannabis for Sleep Did Not Impair Next-Day Driving or Cognition ↗
Crossover trial found no meaningful next-day impairment in cognition, psychomotor function, or simulated driving after adults with insomnia took 10mg THC + 200mg CBD oil the previous evening.
UK medical cannabis patients with insomnia reported improved sleep quality over 18 months ↗
UK registry data from 124 insomnia patients showed medical cannabis improved sleep quality significantly, with benefits persisting but declining over 18 months.
Cannabis use shifted from recreational to medical purposes after spinal cord injury ↗
Survey of 80 Canadians with spinal cord injury found 42.5% used cannabis post-injury, shifting from recreational to pain and sleep motivations with edibles as preferred method.
Younger women substituted THC for alcohol driven by sleep problems, while older women substituted less and were driven by PTSD ↗
Survey of 413 women found younger women substituted THC for alcohol driven by sleep problems (OR 5.82), while older women substituted less and were driven by PTSD symptoms.
Cannabis Affected Sleep Architecture Differently in People With and Without Chronic Pain ↗
In-home EEG study of 339 nights found cannabis use altered multiple sleep stages, but effects on deep sleep and REM differed significantly depending on whether the person had chronic pain.
THC and driving: The simulator crashes peaked at 4 hours, not right after ↗
In a 30-person crossover RCT, THC-related simulator crashes peaked 4 hours after inhalation.
Meta-Analysis: Cannabinoids Improve Sleep Quality, But CBD Alone Does Not ↗
Meta-analysis of 6 RCTs (1,077 patients): cannabinoids improve sleep quality, but the effect is driven by non-CBD formulations. CBD alone showed no benefit.
Medical Cannabis Patients With Sleep Problems Saw Greater Pain Improvements Over 12 Months ↗
1,139 UK chronic pain patients on medical cannabis: those with sleep problems showed greater pain improvements over 12 months than those without.
Cannabis May Break the Daily Cycle of PTSD, Stress, and Poor Sleep in Veterans ↗
3-month daily diary study of 74 veterans: cannabis use predicted lower next-day stress, which predicted fewer PTSD symptoms and better sleep quality.
Veterans' Daily Cannabis Use Linked to Same-Day Stress Relief and Better Sleep, But Alcohol Use Worsened Next Day ↗
Veterans daily diary: cannabis linked to same-day lower stress and better sleep with no next-day effects. Poor sleep drives next-day stress and alcohol use.
Systematic review: medicinal cannabis may offer short-term mental health relief but is not a cure ↗
A systematic review of 49 controlled studies across 11 mental health diagnoses found CBD may offer short-term anxiety relief and CBD/THC combinations helped with cannabis withdrawal and sleep, but THC worsened psychosis and no long-lasting benefits were found for any product.
Alcohol and cannabis problems initially predicted better sleep, but later predicted worse sleep in national US study ↗
A national US longitudinal study found alcohol and cannabis problems initially predicted fewer sleep issues but later predicted more, while people who used both consistently slept worse than the general population, suggesting a reversing relationship over time.
People who misuse sleep medications also commonly use cannabis, alcohol, and tobacco ↗
Among people misusing prescription sleep aids, 55.5% also used marijuana, with two profiles: a common alcohol/marijuana/tobacco pattern and a riskier polysubstance pattern.
Nearly Half of Breast Cancer Patients in This Survey Used CBD ↗
Survey found nearly half of breast cancer patients used CBD, mainly for pain and insomnia, with mixed self-reported results.
Low-Dose Cannabinoid Supplement Improved Sleep Quality in a Small Crossover Trial ↗
Small crossover trial found a low-dose cannabinoid supplement (3 mg THC, 6 mg CBN, 10 mg CBD) improved sleep quality and insomnia symptoms vs placebo over 10 days.
Dispensary Staff Recommended Topicals for Pain and Edibles for Sleep, Often Based on Personal Experience ↗
Secret shopper study of 35 Bay Area dispensaries found budtenders consistently recommended topicals for pain and edibles for sleep, based on personal experience.
Survey Reveals Who Uses CBD for Self-Medication in Germany and Why ↗
A German survey of 702 CBD users found 38% self-medicate for sleep, pain, depression, and anxiety, with older and unemployed individuals most likely.
Medical Cannabis Reduced Pain and Improved Sleep in People on Opioid Addiction Treatment ↗
Adults with opioid addiction and chronic pain who added a daily THC:CBD capsule to their buprenorphine treatment reported less pain and better sleep after three months, though opioid cravings did not significantly change.
People With Opioid Addiction Described Pain Relief, Better Sleep, and Fewer Cravings After a Year of Medical Cannabis ↗
Year-long interviews with people on opioid addiction treatment found they reported less pain, better mood and sleep, and fewer drug cravings from medical cannabis, though cost and appetite changes were concerns.
Baseline Inflammation Levels Influenced Whether Cannabis Helped Anxiety and Sleep ↗
A study of people with anxiety found that baseline inflammation levels influenced whether different cannabis products improved mood and sleep, with CBD-dominant products showing the most reliable benefits.
Recreational Cannabis Use Was Linked to Worse Sleep Across 120 Studies ↗
Meta-analysis of 120 studies found recreational cannabis use was linked to worse sleep in observational research, but experimental studies showed no effect, suggesting the relationship is more complex than it appears.
Low-Dose Cannabis Oils Did Not Make Healthy Adults Sleepy or Change Their Sleep ↗
A crossover RCT of 20 healthy adults found that low-dose THC:CBD oils (1:1 and 1:16 ratios) did not cause daytime sleepiness or change night-time sleep compared to placebo.
A CBD-CBC Combination Best Reversed Sleep Deprivation Damage in Mice ↗
Among multiple cannabinoid treatments tested in sleep-deprived mice, a CBD+CBC combination was the most effective at reversing memory impairment, depression, and brain inflammation.
91% of Cannabis Users With Chronic Conditions Used It Medicinally During COVID-19 ↗
Among 1,466 cannabis users with chronic conditions during COVID-19, 91% used cannabis medicinally for sleep, pain, and headaches, but most lacked medical guidance.
Twin Study Finds Cannabis Use for Sleep Linked to Worse Sleep Quality and More Substance Use ↗
Twin study of 3,165 adults found cannabis use for sleep linked to worse sleep quality and more substance use, even after controlling for shared genetics.
Cannabis Helped Sleep in the First Week of Treatment but Hurt It by Week Two ↗
Daily tracking of 65 young people in cannabis treatment showed cannabis helped sleep in the first two weeks but the benefit disappeared by week three.
Opioid Treatment Clinicians See Both Harms and Benefits of Cannabis Use in Their Patients ↗
Clinician survey found over half of opioid treatment clients reportedly use cannabis, with recognized benefits for sleep and mental health alongside harms like dependence.
Twitter Analysis Found Mostly Positive Sentiment About CBD for Insomnia ↗
Analysis of 25,000 relevant tweets found mostly positive public sentiment about CBD for insomnia, though clinical trial evidence remains limited.
CBD Shows Promise for Anxiety and Sleep, But Evidence Quality Varies Widely ↗
Scoping review of 29 studies found CBD shows promise for both anxiety and sleep, but inconsistent methods and dosing across studies limit definitive conclusions.
Higher CBD Doses Improved Sleep in Nearly 2,000 Cancer Patients in Minnesota Medical Cannabis Program ↗
Among 1,962 cancer patients in Minnesota's medical cannabis program, higher CBD doses were linked to better sleep improvement (1.87 points on 0-10 scale), while THC showed no consistent sleep benefit.
Sleep Quality Improved Early and Stayed Better Over 12 Months of Medical Cannabis Use ↗
12-month observational study of 137 new medical cannabis patients found early and sustained improvements in self-reported sleep quality across all measures, regardless of administration route or condition.
Pre-Trauma Insomnia Predicted Heavier Cannabis Use After Traumatic Events ↗
Large prospective study of 2,449 trauma survivors found pre-trauma insomnia predicted heavier cannabis and alcohol use 8 weeks later, partly through early PTSD symptoms.
Cannabis Doesn't Consistently Change Sleep Patterns — But Withdrawal Clearly Disrupts Sleep ↗
A meta-analysis of polysomnographic studies found cannabis doesn't consistently change measurable sleep patterns, but quitting after regular use clearly disrupts sleep — highlighting a gap between subjective and objective sleep effects.
Cannabis Use Was Linked to Poorer Sleep Quality in Adults With Type 1 Diabetes ↗
Among 1,322 Canadian adults with type 1 diabetes, cannabis users had 58% higher odds of poor sleep quality — notable given that nearly half of T1D adults already sleep poorly.
People With Excessive Sleepiness Disorders Use Cannabis at Nearly Double the General Population Rate ↗
People with hypersomnolence disorders used cannabis at nearly double the general population rate in the Netherlands, with most current users reporting symptom improvement — providing rationale for clinical trials.
Topical CBD Gel Improved Sleep and Reduced Migraine Disability in Bruxism Patients ↗
A double-blind RCT found that CBD gel applied to jaw muscles nightly for 30 days significantly improved sleep quality and reduced migraine disability in bruxism patients, with 10% CBD showing the strongest effects.
Recreational Cannabis Laws Are Associated With People Sleeping About 5 Minutes Less ↗
Analysis of 175,493 Americans showing recreational cannabis legalization is associated with falling asleep 7 minutes later and sleeping 5 minutes less per night.
1 in 4 Cancer Patients Use Cannabis — Mostly for Sleep, Pain, and Nausea ↗
Survey of 2,602 cancer patients finds 1 in 4 use cannabis — primarily for sleep, with higher use among Stage 4 and chemotherapy patients, using multiple consumption methods.
THC Before Bed Disrupts Sleep Stages and Reduces Heart Rate Variability ↗
A pilot study found that THC before bedtime increased sleep onset time and slow-wave sleep but significantly reduced heart rate variability during sleep, suggesting cardiovascular effects of nighttime cannabis use.
300mg CBD Shows Promise for Sleep in Worriers — But Doesn't Beat Placebo ↗
A randomized trial found 300 mg CBD improved sleep more than 50 mg CBD in high-worry individuals, but the difference from placebo was not statistically significant after 2 weeks of daily use.
Cannabinol Shows Mixed Results for Insomnia in First Rigorous Clinical Trial ↗
First rigorous clinical trial of CBN for insomnia shows 300 mg improved subjective sleep quality and time to fall asleep but missed the primary endpoint of reducing nighttime wakefulness.
Tracking Why People Use Cannabis Day by Day Could Power Personalized Interventions ↗
Pilot study tracking daily cannabis use motives over 28 days finds shifts toward sleep-aid and availability motives predict higher use, demonstrating feasibility of adaptive just-in-time interventions.
Young adults reported better sleep quality on days they used alcohol and cannabis together compared to alcohol-only or no-use days ↗
Daily diary study finds young adults report better sleep quality on days they use alcohol and cannabis together versus alcohol-only or no-use days.
Medical cannabis improved sleep, fatigue, and pain for patients with muscle spasticity or spasms, but not physical functioning ↗
Medical cannabis improved sleep, fatigue, and pain for spasticity/spasm patients but not physical functioning.
Cannabis Oil Matched Lorazepam for Treating Chronic Insomnia in Head-to-Head Trial ↗
RCT with 60 chronic insomnia patients found cannabis oil matched lorazepam for sleep improvement over 4 weeks, with better quality-of-life outcomes and only mild side effects.
Veterans in Addiction Treatment Describe Using Cannabis to Manage Pain ↗
Qualitative study found veterans in addiction treatment used cannabis to manage chronic pain, anxiety, and sleep — framing it as a harm reduction alternative to more dangerous substances.
Cannabis Actually Reduced Sleep Time and Suppressed REM in People With Insomnia ↗
RCT found THC/CBD reduced total sleep time by 25 minutes and dramatically cut REM sleep by 34 minutes in insomnia patients — challenging the cannabis-aids-sleep belief.
Nearly 500 fibromyalgia patients in the UK saw improvements in pain, anxiety, and sleep after starting medical cannabis ↗
UK registry data from 497 fibromyalgia patients showed medical cannabis was linked to improved pain, anxiety, sleep, and quality of life, though nearly half reported side effects.
Canadian medical cannabis patients saw improvements in pain, anxiety, and depression over 6 months, but none reached clinically meaningful thresholds ↗
Canadian 24-week study found medical cannabis patients improved on pain, anxiety, depression, and quality of life measures, but improvements fell below clinically meaningful thresholds.
A pilot trial found medical cannabis feasible and potentially helpful for pain, appetite, and insomnia in pancreatic cancer patients ↗
Pilot RCT of 32 pancreatic cancer patients found medical cannabis feasible through state program partnership, with promising but non-significant improvements in pain, appetite, and insomnia.
Nabilone significantly reduced PTSD nightmares in treatment-resistant military veterans — leading the Canadian military to adopt cannabinoids for PTSD treatment ↗
Nabilone significantly reduced PTSD nightmares in 10 treatment-resistant military veterans, leading the Canadian Armed Forces to adopt cannabinoids for PTSD treatment.
The Sleepy Cannabinoid That Isn't: Zero Evidence That CBN Helps You Sleep ↗
Zero clinical trials support CBN as a sleep aid. Eight human studies found no reliable sedative effects. The "sleepy cannabinoid" label is marketing, not science.