medical cannabis for seniors
A practical guide to medical cannabis for seniors: who it may help, how to start low, which product features matter, and what to ask a doctor first.
Short Answer
Federal law lists cannabis as a Schedule I drug. The FDA has not approved the plant for any medical use. The FDA has approved three cannabinoid drugs: Epidiolex, dronabinol, and nabilone. Evidence for other conditions in adults 65 and older is limited. Risks include falls, dizziness, drug interactions, and cognitive effects.
What the Evidence Shows
FDA-approved cannabinoid drugs
- Epidiolex (CBD) treats seizures from Dravet syndrome, Lennox-Gastaut syndrome, and tuberous sclerosis complex in patients 2 years and older.
- Dronabinol (Marinol, Syndros) treats chemotherapy-induced nausea and vomiting and anorexia with weight loss in AIDS.
- Nabilone (Cesamet) treats chemotherapy-induced nausea and vomiting.
These drugs contain purified or synthetic cannabinoids. They are not the same as smoked flower or edible products sold in state markets.
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Conditions with some evidence
Reviews find low to moderate evidence for cannabis in chronic pain, spasticity in multiple sclerosis, and chemotherapy nausea. Evidence for sleep, anxiety, and dementia is weaker. Study sizes are small. Follow-up periods are short.
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Risks for Adults 65 and Older
Adults 65 and older make up about 17% of the US population. Many take four or more prescription drugs. THC can cause dizziness, unsteady walking, and falls. Falls are a leading cause of injury in this group. THC also can raise heart rate and lower blood pressure. Some adults report confusion and memory problems.
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Cannabis use disorder occurs in a minority of users. Risk rises with daily use and high THC content.
Drug Interactions
Cannabinoids interact with cytochrome P450 enzymes. These enzymes process warfarin, clopidogrel, some statins, and benzodiazepines. CBD can raise levels of some anti-seizure drugs. Check all medications with a pharmacist before use.
Forms and Dosing
Forms include flower, oil, tincture, edible, and capsule. Edibles take 30 to 120 minutes to act. Effects last 4 to 8 hours. Inhaled products act in minutes and last 1 to 3 hours. Start with a low dose. Wait at least 2 hours before a second dose. THC content varies by product. Product labels may not match actual THC content.
Legal Status
Cannabis is illegal under federal law. More than 35 states allow medical cannabis. More than 20 states allow adult use. Most state programs require a doctor's recommendation and a state card. Federal employees, some patients with firearms, and travelers face limits.
Questions for a Doctor
- Does my condition have evidence for cannabis?
- How does cannabis interact with my current drugs?
- What dose and form should I start with?
- What side effects should I watch for?
- How does state law affect my access?