Tetrahydrocannabinol
Best for
Reduce everyday pain intensity
Likely strong benefit for 8 weeks · 2 meta-analyses , n=294
10 papers · 10 claims · 25 outcomes scored · 4 positive
Outcomes
What tetrahydrocannabinol actually does, by outcome
Each row is one outcome with effect size, evidence base, the dose that worked in trials, and time to first effect. Magnitude tiers come from native-unit MCID where available, Cohen's d otherwise.
Fewer days where health problems dictate what you can and cannot do.
Lower intensity, fewer flares, and longer stretches of relief.
Overactive nerves calm down so ordinary touch stops feeling threatening.
Less burning, tingling, and numbness in your hands and feet.
Less nausea, vomiting, and appetite loss during treatment cycles.
Deeper, less interrupted nights that leave you recharged by morning.
The background hum of worry that colors everything gets quieter.
Quiets the health worries and body tension that build with age.
Quiets the overthinking that hijacks execution right before you compete.
| Outcome | Effect | Evidence | Dose | Weeks | Rank |
|---|---|---|---|---|---|
| Improve everyday quality of life Large effect, needs confirmation | | 2 meta-analyses n=2.5k Meta-analyzed | — | 8 wk | #6/61 |
| Reduce everyday pain intensity Likely strong benefit | | 4 meta-analyses n=294 Meta-analyzed | — | 8 wk | #7/55 |
| Ease nerve pain and sensitivity Large effect, needs confirmation | | 1 RCT n=16 | 16–28 mg | — | #1/5 |
| Ease neuropathy pain and numbness Likely real but unnoticeable | | 1 meta-analysis n=2.5k Meta-analyzed | — | — | #4/7 |
| Ease chemo stomach side effects Probably doesn't help | | 1 meta-analysis n=1.0k Meta-analyzed | — | — | — |
| Improve overall sleep quality Probably doesn't help | | 1 meta-analysis n=2.5k Meta-analyzed | — | — | — |
| Lower day-to-day anxiety Not enough research | | 2 RCTs n=41 | 1.22–4.4 mg | 8 wk | — |
| Ease anxiety in older adults Not enough research | | 2 RCTs n=41 | 1.22–4.4 mg | 8 wk | — |
| Reduce pre-competition anxiety Not enough research | | 2 RCTs n=41 | 1.22–4.4 mg | 8 wk | — |
| Feel full longer and crave less Not enough research | | 2 RCTs n=40 | 50.6 mg | — | — |
Sources
- 1. Ingestion of a THC-Rich Cannabis Oil in People with Fibromyalgia: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial. (2020) ↑
- 2. Indications of Cannabinoids for the Palliation of Cancer-Associated Symptoms: A Systematic Review and Meta-Analysis. (2025) ↑
- 3. Systematic review and network meta-analysis of the effects of bioactive compounds on pain intensity and quality of life in neuropathic pain patients. (2025) ↑
- 4. Acute effects of cannabinoids on symptoms of obsessive-compulsive disorder: A human laboratory study. (2020) ↑
- 5. Efficacy of Inhaled Cannabis on Painful Diabetic Neuropathy. (2015) ↑
- 6. Vaporized cannabis versus placebo for acute migraine: A randomized, double-blind, placebo-controlled crossover trial. (2026) ↑
- 7. A pilot study of the effects of cannabis on appetite hormones in HIV-infected adult men. (2012) ↑
- 8. Effects of oral, smoked, and vaporized cannabis on endocrine pathways related to appetite and metabolism: a randomized, double-blind, placebo-controlled, human laboratory study. (2020) ↑
- 9. Acute Effects of Cannabis on Alcohol Craving and Consumption: A Randomized Controlled Crossover Trial. (2026) ↑
- 10. Dose-dependent effect of acute THC on extinction memory recall and fear renewal: a randomized, double-blind, placebo-controlled study. (2026) ↑
Generated August 14, 2026
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