Cannabis and alcohol are the two most widely used recreational substances in the world, and comparing them is both natural and consequential — most adults in Western societies will make a personal choice about their relationship with one or both. They differ fundamentally in pharmacology, risk profile, subjective experience, and social context. Alcohol is a central nervous system depressant acting primarily through GABA enhancement and glutamate inhibition. Cannabis contains dozens of psychoactive compounds, with THC acting primarily on endocannabinoid CB1 receptors. While alcohol has millennia of cultural integration and legal acceptance, cannabis legalization is rapidly changing the landscape, prompting many people to reconsider which substance they prefer and why.
oral |
| Effects | 87 documented | 63 documented |
| Interaction | Uncertain | |
Toxicity and overdose risk is the starkest difference. Alcohol has a well-defined lethal dose — acute alcohol poisoning kills thousands annually and is a genuine risk during heavy sessions. Cannabis has no confirmed lethal dose in humans. You can have a deeply unpleasant experience from too much THC (anxiety, paranoia, nausea), but it will not kill you. This single fact dominates any honest risk comparison.
Addiction potential is significant for both but differs in character. Alcohol produces severe physical dependence with potentially lethal withdrawal symptoms (seizures, delirium tremens). Cannabis dependence is primarily psychological, with withdrawal symptoms limited to irritability, insomnia, and reduced appetite. Roughly 10% of cannabis users develop problematic use patterns, compared to about 15% of alcohol users.
Cognitive effects move in different directions. Alcohol impairs judgment, coordination, and reaction time in a dose-dependent fashion. Cannabis impairs short-term memory and can slow reaction time, but often leaves higher-order judgment relatively intact at low-moderate doses. Neither is safe for driving.
Health impact over time diverges dramatically. Chronic heavy alcohol use damages virtually every organ system — liver disease, heart damage, neurodegeneration, cancer risk. Long-term cannabis use has a considerably milder health profile, with primary concerns being respiratory issues from smoking (avoidable with other routes) and possible cognitive effects from heavy adolescent use.
Social behavior shows characteristic differences. Alcohol disinhibits and often increases social aggression — it is a factor in roughly 40% of violent crimes. Cannabis tends to produce passivity, introspection, and social withdrawal. The association between cannabis and violence is minimal.
Hangover and recovery differ meaningfully. Alcohol hangovers can be debilitating — headache, nausea, fatigue, and cognitive impairment lasting 12–24 hours. Cannabis produces no comparable hangover, though heavy evening use may leave some users feeling groggy the next morning.
| Level | Cannabis | Alcohol |
|---|---|---|
| Threshold | 1 mg | 10 g |
| Light | 2.5–5 mg | 10–20 g |
| Common | 5–10 mg | 20–30 g |
| Strong | 10–25 mg | 30–40 g |
| Heavy | 25 mg | 40 g |
| Level | Dose |
|---|---|
| Threshold | 0.4 mg |
| Light | 0.4–2 mg |
| Common | 2–4 mg |
| Strong | 4–10 mg |
| Heavy | 10 mg |
| Level | Dose |
|---|
Cannabis
Alcohol
No dangerous interactions recorded.