Cannabis for Stress Relief: CBD Facts, Doses, and Risks

Answer

CBD (cannabidiol) comes from Cannabis sativa. It does not cause intoxication. Human trials that used 300 mg to 600 mg of CBD reported lower anxiety scores in the hours after a dose. Products sold in stores often hold 10 mg to 50 mg per serving. No US health agency has approved CBD for stress or anxiety. The FDA approved one CBD medicine, Epidiolex, in 2018. That approval covers two rare seizure disorders.

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What studies found

Evidence on CBD and stress comes from small trials and lab work. Subject counts are low, and most designs lacked a placebo arm.

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• 1993: 300 mg CBD lowered anxiety in healthy volunteers during a public speaking test.
• 2011: 600 mg CBD lowered anxiety in people with social anxiety disorder.
• 2019: 57 patients took 300 mg each day. 79% reported less anxiety in month one. The study had no placebo group.
• 2015 review: 49 studies on CBD and anxiety. Most used animals. The authors rated the human evidence as limited.

CBD and THC

THC binds CB1 receptors in the brain and drives the high. High THC doses can raise anxiety and heart rate. CBD binds CB1 and CB2 with low affinity. It acts on the 5-HT1A serotonin receptor and slows the breakdown of anandamide. Some users report better stress relief from CBD plus a small amount of THC. Human data on that mix is thin.

CBD vs THC for Stress: Which One to Pick First

Dose

There is no standard CBD dose for stress. Trial doses ran 300 mg to 600 mg. Store products run 10 mg to 50 mg. Start low and track mood, sleep, and pulse for two weeks. CBD taken by mouth peaks in 1 to 2 hours. Effects last about 4 to 6 hours. The half-life runs 18 to 32 hours.

Risks

Side effects include dry mouth, diarrhea, sleepiness, and lower appetite. High doses can raise liver enzymes. CBD blocks the CYP3A4 and CYP2C19 enzymes. That can change blood levels of warfarin, clobazam, and some statins. Ask a pharmacist before mixing CBD with prescription drugs. People who are pregnant should not use CBD.

A 2017 study in JAMA tested 84 CBD products. 26% held less CBD than the label claimed.

Law

Federal law treats hemp with delta-9 THC below 0.3% by dry weight as legal. State rules differ. Some states limit CBD in food and drinks. Shops and dispensaries set age limits.