Research library — page 133

Heart Attack Risk Is Nearly 5 Times Higher in the First Hour After Smoking Cannabis ↗

Cannabis elevates heart attack risk 4.8x in the first hour after use — similar to heavy exercise (5.9x) and anger (2.3x) — but the absolute risk is low.

The First Major Study Linking Marijuana Use in Pregnancy to Lower Birth Weight ↗

First large NEJM study to show marijuana use in pregnancy is independently associated with lower birth weight (79g less) and shorter length, after controlling for tobacco, alcohol, and cocaine.

Five Cannabis Compounds Kill Drug-Resistant MRSA as Effectively as Last-Resort Antibiotics ↗

All five major cannabinoids killed MRSA as effectively as vancomycin — opening an unexpected new front in the fight against antibiotic-resistant superbugs.

The terpene in black pepper that is literally a cannabinoid ↗

Beta-caryophyllene from black pepper selectively activates the CB2 cannabinoid receptor — the only terpene confirmed to directly bind a cannabinoid receptor, with anti-inflammatory effects proven in mice.

States with Medical Marijuana Laws Had 25% Fewer Opioid Deaths ↗

States with medical marijuana laws had 24.8% fewer opioid deaths — but later data complicated the picture.

The study that ranked 20 drugs by harm and found alcohol most dangerous, cannabis 8th ↗

Landmark Lancet study ranked 20 drugs by harm: alcohol scored highest (72/100), cannabis placed 8th (20/100). Drug classifications correlated poorly with actual evidence of harm.

The US Government's Official Assessment of What Cannabis Can and Cannot Do ↗

The definitive 468-page review: strong evidence for chronic pain and psychosis risk, insufficient evidence for most other claims, and a call to remove research barriers.

The 20-Year Study That Found Moderate Pot Smoking Doesn't Hurt Your Lungs ↗

CARDIA cohort, 5,115 people, 20 years: cannabis smoking showed a nonlinear pattern — slight lung function improvement at low exposure, leveling off at moderate, trend toward decline only at very high exposure. The opposite of tobacco's linear harm.

The Biggest Study of Cannabis and Lung Cancer Found No Link — Even in Heavy Smokers ↗

Largest case-control study found no cannabis-lung cancer link even in 22,000+ joint users — contradicting the carcinogen hypothesis.

The Edible Safety Report That Changed Cannabis Regulation ↗

The comprehensive RTI review that documented why edibles cause disproportionate ER visits and established the evidence base for the 10mg standard serving size.

The Trial That Made Cannabis a Real Prescription Medicine ↗

Pivotal Phase III RCT. 572 MS spasticity patients, enriched-enrollment design. 47.6% responded to Sativex in open-label phase. Among randomized responders, Sativex maintained benefit vs placebo deterioration (p=0.0002). Led to approval in 25+ countries.

Cannabis Improved Parkinson's Tremor and Movement Within 30 Minutes ↗

22 PD patients, open-label. UPDRS motor score improved 30% within 30 minutes of smoking cannabis. Tremor, rigidity, bradykinesia all significantly improved. No control group limits interpretation.

Low-Dose THC Reversed Cognitive Aging in Old Mice — Restoring Memory to Young Levels ↗

THC at microdoses restored aged mouse brains to young-mouse cognitive and gene expression levels — while impairing young mice.

Legal Cannabis Saved Medicare $165 Million Per Year by Reducing Prescriptions ↗

Legal cannabis access reduced Medicare prescriptions for pain, anxiety, sleep, and seizure medications — saving $165.2 million per year.

Cannabis Made Opioids Work 27% Better Without Changing Their Blood Levels ↗

Cannabis enhanced opioid pain relief by 27% without increasing opioid blood levels — demonstrating receptor synergy with opioid-sparing potential.

Black Americans Are Arrested for Marijuana at Nearly 4x the Rate of White Americans Despite Similar Usage ↗

FBI data analysis showed Black Americans arrested for marijuana at 3.73x the rate of white Americans despite similar usage — a disparity that persisted even after a decade of legalization reform.

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.

CBD Oil Reduces Arthritis Pain in Dogs — The First Controlled Trial ↗

The first controlled trial of CBD for dog arthritis — from Cornell University — found significant pain reduction and activity improvement. Dogs can't placebo, making this unusually clean evidence.

The doctor who proved less cannabis works better than more ↗

Based on 18,000+ patients, Sulak showed that most cannabis patients use far more than they need — 1-5mg THC often provides better therapeutic results than higher doses, without tolerance buildup.

Medical Marijuana Cut Migraine Frequency by More Than Half in 121 Patients ↗

Medical cannabis reduced monthly migraine frequency from 10.4 to 4.6 in 121 patients — large effect but no placebo control.

CBD Cream Actually Reaches Arthritic Joints and Reduces Pain in Rats ↗

First evidence that topical CBD penetrates skin, reduces joint inflammation, and relieves arthritis pain in rats — at specific doses and without CNS effects.

The First Randomized Trial of THC + CBD for Brain Cancer: Encouraging Numbers, Tiny Sample ↗

First randomized trial of THC+CBD for brain cancer showed 83% vs 44% one-year survival — encouraging but from only 21 patients. The ARISTOCRAT follow-up trial with 230+ patients is actively recruiting.

The First Scientific Map of What It Feels Like to Be High — Including Why Music Sounds Better ↗

The first systematic study of cannabis subjective effects found that 70% of users report enhanced music perception — a finding now explained by THC's effects on auditory processing, attention filtering, and dopamine reward.

The earliest chemical evidence of cannabis smoking: 2,500-year-old funeral rites in the Pamir Mountains ↗

Chemical analysis of 2,500-year-old funeral braziers from the Pamir Mountains reveals the earliest evidence of cannabis smoking for psychoactive purposes.

The interview that declared indica vs sativa labels scientifically meaningless ↗

Russo declared the indica/sativa distinction "total nonsense" in this landmark interview, arguing that only chemical testing — cannabinoid and terpene profiles — can meaningfully classify cannabis products.

The Endocannabinoid System Is Over 500 Million Years Old ↗

Endocannabinoid system genes traced back 500+ million years across the animal kingdom — proving the ECS is among the most ancient and essential signaling systems in biology.

The Endocannabinoid System and the Brain: Mechoulam's Masterwork Review ↗

Mechoulam's definitive review of how the brain's own cannabis system regulates anxiety, mood, memory, and reward — and why dose determines whether the effect is therapeutic or harmful.

The Largest Trial of CBD for Psychosis Found It Reduces Symptoms With Almost No Side Effects ↗

Largest CBD-for-psychosis RCT: 88 patients, 6 weeks. CBD 1000mg/day significantly reduced positive symptoms with zero side effect burden.

Cannabis Use Predicts Reduced Initiative and Persistence in College Students Over One Month ↗

Longitudinal study of 505 college students found cannabis predicted reduced initiative and persistence one month later, providing partial support for amotivational syndrome while revealing the effect is modest and selective.

Daily Teenage Cannabis Use Cuts High School Completion Odds by 63% — Multi-Cohort Evidence ↗

Multi-cohort analysis of 3,765 adolescents found daily cannabis use before 17 was associated with 63% lower high school completion, 18x higher dependence, and 7x higher suicide attempts — after controlling for 53 confounders.

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.

The Definitive History of How Racism Built American Drug Prohibition ↗

The definitive history of US drug prohibition, documenting how Harry Anslinger's racist propaganda — not pharmacological evidence — produced cannabis criminalization in 1937 and shaped policy for nearly a century.

Fifty Years of Cannabinoid Research: Mechoulam's Retrospective ↗

The founder of cannabinoid chemistry looked back on 41 years and argued that most cannabis compounds remained completely unstudied — a neglected pharmacological treasure trove.

Twenty Years of the Endocannabinoid Deficiency Hypothesis: What Held Up and What Didn't ↗

Twenty-year reassessment of the hypothesis that migraine, fibromyalgia, and IBS share underlying endocannabinoid dysfunction — evolved from simple deficiency to nuanced dysregulation model.

The oldest cannabis stash ever found: 789 grams in a 2,700-year-old shaman's tomb ↗

Nearly two pounds of cultivated, psychoactive cannabis found in a 2,700-year-old shaman's tomb in China — confirmed by chemical and genetic analysis as the oldest drug-type cannabis specimen ever discovered.

Does Weed Kill Brain Cells? The Evidence Says No. ↗

No evidence that cannabis kills brain cells — the myth traces to a debunked 1980 study. Changes are functional and reversible.

The Debunked Monkey Study That Created the Cannabis Kills Brain Cells Myth ↗

Debunked study origin of the kills brain cells myth — monkeys were suffocated, not drugged by cannabis.

Cannabis Has One of the Widest Safety Margins of Any Psychoactive Substance — You Essentially Cannot Fatally Overdose ↗

Mixing cannabis and alcohol simultaneously doubles drunk driving risk and triples social consequences ↗

Mixing cannabis and alcohol simultaneously doubles drunk driving risk and triples social problems. Keeping them separate is dramatically safer.

Cannabis Users May Need More Anesthesia and Face Higher Surgical Complication Risk ↗

Cannabis users may need dramatically more sedation and face higher airway/cardiovascular risk during surgery, but most never tell their surgical team.

The Paper That Dismantled the Gateway Theory ↗

The comprehensive review that argued the gateway hypothesis should be replaced by the common liability model: shared genetic and neurobiological risk factors, not cannabis itself, drive drug escalation.

The Scientists Who Discovered Cannabis Could Kill Cancer Cells Explain Why That Doesn't Mean Cannabis Cures Cancer ↗

The researchers who discovered cannabis could kill cancer cells in the lab explain the science and warn: preclinical evidence is real but no one should replace proven cancer treatments with cannabis.

Cannabis Makes Exercise Feel Better Without Making You Perform Better ↗

Cannabis made running more enjoyable (90.5%), less painful (69%), and more motivating (57%) — without improving performance. CBD worked better than THC for exercise enjoyment.

Yes, You Can Be Allergic to Cannabis — And It Can Be Serious ↗

Cannabis allergy is real — IgE-mediated, potentially serious, cross-reactive with tomatoes and peaches, and rising as exposure increases.

Does Cannabis Affect Birth Control? What the Pharmacological Evidence Shows ↗

No evidence shows cannabis reduces birth control effectiveness. The enzyme interaction (CYP3A4 inhibition) would theoretically increase contraceptive hormone levels, not decrease them.

Why edibles hit different: the discovery of the metabolite that makes eaten cannabis more potent ↗

Lemberger discovered that the liver converts THC into 11-hydroxy-THC, a metabolite up to 7x more potent — the molecular reason edibles hit harder, last longer, and feel different from smoking.

The Endocannabinoidome: Why the Endocannabinoid System Is Far Bigger Than Anyone Thought ↗

Di Marzo revealed that the endocannabinoid system is part of a much larger 'endocannabinoidome' — with 20+ receptors and dozens of signaling molecules — explaining why CBD works and why single-target drugs often fail.

The Trial That Got CBD Approved: 39% Fewer Seizures in Children With Dravet Syndrome ↗

NEJM RCT: CBD reduced seizures 39% vs 13% placebo in Dravet syndrome. Led to Epidiolex FDA approval — first cannabis-derived drug.

The Twin Study That Gave the Gateway Theory Its Strongest Evidence ↗

The Australian twin study that provided the strongest evidence for a cannabis gateway effect: early-using twins were 2-5x more likely to escalate to other drugs.

The First Study of Cannabis and Sexual Function Specifically in Women ↗

First study of cannabis and female sexual function found that women who used cannabis before sex had 2.13x the odds of satisfactory orgasm, with the majority reporting improved desire and pleasure.