Pick first: the refill path
Chronic pain affects about 50 million US adults, or 20.4% of the adult population, per CDC data. High-impact chronic pain affects about 17.6 million. Both groups refill something on a schedule. The refill path decides the choice for most people.
Cannabis for Pain Relief Reviews 2025: Convenience Picks Compared
Opioid refills run through a licensed prescriber, a state prescription drug monitoring program check, and a pharmacy. Under DEA rules, Schedule II prescriptions cannot be refilled. Each fill needs a new prescription. Medical cannabis refills run through a state-issued card and a dispensary. Card terms run 1 to 12 months, based on state law. Home delivery is legal in some states.
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Convenience favors cannabis in the 38 states plus DC that license medical programs. Availability favors opioids. Pharmacies outnumber dispensaries, and insurance covers opioids. Most insurers do not cover cannabis. A month of medical cannabis runs $100 to $300 cash in most state markets. Generic oxycodone runs $10 to $40 cash, less with insurance.
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Effect size
A 2015 meta-analysis in JAMA pooled 79 trials and found moderate-quality evidence that cannabinoids reduce chronic pain. A 2017 National Academies report reached the same finding for chronic pain in adults and listed limited evidence for cancer pain.
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Cochrane reviewed opioids for chronic non-cancer pain and found small to moderate short-term benefit. That review found no trials that ran past 12 months. Results for both classes land in one range: about 30% to 40% of patients report a 30% or greater drop in pain scores.
Risk separates them. CDC counts about 80,000 opioid-involved overdose deaths per year in the US. National data do not record cannabis overdose deaths. Cannabis carries its own risks: cannabis use disorder, impaired driving, and lung irritation from smoke. FDA has approved no plant cannabis product for pain. Epidiolex is the only approved cannabis-derived drug, and it treats seizures.
Potency and dose
NIDA reports average THC in confiscated cannabis rose from under 4% in 1995 to about 15% in 2021. Concentrates run 50% to 80%. Oral tinctures start at 1 mg to 2.5 mg per dose. Inhaled products act in 5 to 10 minutes. Oral products act in 30 to 90 minutes. The lag matters during a pain flare.
Options
- Same-day card by telehealth: 10 to 30 minutes, $50 to $200, then a dispensary visit the same day.
- Inhaled flower or vape: onset in 5 to 10 minutes, weakest dose control.
- Oral tincture or capsule: onset in 30 to 90 minutes, best dose control, longer effect.
- Topical: no intoxicating effect, thin evidence for deep pain.
- Opioid prescription: fastest pharmacy fill, insurance-covered, highest overdose risk.
Bottom line
No head-to-head trial compares cannabis with opioids for chronic pain over 12 months. Pick by refill path, insurance, and onset speed. Then pick a product. Convenience decides first. Evidence and risk decide second.