CBD
TL;DR
Non-psychoactive compound from hemp (Cannabidiol)
Moderate evidence for anxiety and sleep, though high-quality RCTs are still lacking
Large-scale user data shows significant subjective improvement in sleep latency
Strong interaction profile — 'The Grapefruit Effect' on many medications
Relatively expensive: ~$30-60/month
Best for: Anxiety-driven insomnia, chronic pain-related sleep issues
What it is
CBD is one of over 100 cannabinoids found in the cannabis plant. Unlike THC, it does not produce a 'high.' It works primarily by interacting with the body's endocannabinoid system (ECS), which regulates everything from mood and pain perception to sleep-wake cycles.
CBD is thought to reduce anxiety by modulating the 5-HT1A serotonin receptor and potentially increasing levels of anandamide (the 'bliss molecule'). Because it addresses both anxiety and pain—two major sleep disruptors—it has become a massive market for insomnia relief, despite being ahead of the clinical data.
What the research says
The evidence for CBD and sleep is a mix of glowing anecdotal reports and 'wait-and-see' clinical science. The Shannon et al. Study (2019). A large retrospective case series found that 79% of patients reported decreased anxiety and 66% reported improved sleep scores within the first month. Dose Matters. Interestingly, low doses of CBD may be slightly stimulating, while higher doses (160mg+) are more consistently sedating. Practical Reality. Most 'over-the-counter' CBD oils are under-dosed compared to what's used in clinical trials. It works best for people whose sleep is interrupted by physical discomfort or generalized anxiety.
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Safety
Generally well-tolerated. High doses may cause dry mouth, low blood pressure, or lightheadedness. The biggest risk is product quality: third-party testing is mandatory to ensure there is no lead, pesticides, or hidden THC.
Interactions
- Many Medications: CBD inhibits CYP3A4 and CYP2C19 enzymes (similar to grapefruit). It can dangerously increase levels of Warfarin, Valproate, and many statins.
- Alcohol: Increases sedation significantly.
Dosing
For Sleep: 25-160 mg taken 1 hour before bed. Start low (15-25mg) and titrate up slowly. Form: Full-spectrum oil (under the tongue) has better bioavailability than gummies or capsules.
Cost
Expensive. A therapeutic daily dose of high-quality CBD can easily cost $1.50 to $3.00 per day ($45-90/month).
The bottom line
CBD is a promising tool, especially for the 'anxious-painful' sleeper, but the high cost and potential for drug interactions mean it shouldn't be your first choice unless other options fail.
Sources for this page include published meta-analyses, systematic reviews, and NIH dietary supplement fact sheets. All claims reflect the evidence as of early 2026.
This is not medical advice. Consult your healthcare provider before starting any supplement, especially if you take medications.