Cannabis and Older Adults: The Fastest-Growing Group, and the Riskiest

Cannabis use among adults over 65 has grown faster than in any other age group. The reasons are straightforward: chronic pain, insomnia and arthritis are common, conventional treatments have real drawbacks, and legal access has removed the barrier that kept a generation away.

The reasons are sound. The margin for error is narrower than at any other age, and most consumer guidance is written for younger users.

Why Older Adults Respond Differently

Several changes stack up:

Body composition. Fat mass increases relative to lean mass with age, and cannabinoids are fat soluble, which alters distribution and how long effects persist.

Liver metabolism. Hepatic blood flow and enzyme activity decline, slowing clearance so a given dose produces higher and longer exposure.

Brain sensitivity. Older adults are generally more sensitive to psychoactive drugs, and cognitive reserve varies.

Polypharmacy. Many take several medications, multiplying interaction opportunities.

The practical translation is simple: a dose that is unremarkable at 30 can be significant at 75.

The Risk That Matters Most: Falls

This deserves top billing because the consequences are the most severe.

Cannabis can cause dizziness, sedation, impaired coordination and orthostatic hypotension, a drop in blood pressure on standing. Older adults frequently already have some postural blood pressure instability and reduced balance.

A fall in an older adult is not a minor event. Hip fracture carries substantial mortality and loss of independence in the year following. Any intervention that raises fall risk in this group needs to earn its place.

Practical measures: start at the lowest possible dose, take the first dose at home while seated, avoid getting up quickly, use it in the evening when already settled rather than before activity, and consider removing trip hazards before starting rather than after an incident.

Cardiovascular Risk

Cannabis acutely increases heart rate, and research has reported an elevated risk of myocardial infarction in the hour following cannabis use. In a younger person with healthy arteries that increment is small in absolute terms. In someone with coronary disease it matters more.

Anyone with a history of heart attack, angina, arrhythmia or heart failure should treat cannabis as a cardiac question and discuss it with their cardiologist rather than a dispensary staff member.

Interactions Are the Common Problem

The typical older adult on five or more medications is where cannabis stops being simple.

Anticoagulants. CBD can raise warfarin levels through CYP2C9 inhibition, increasing bleeding risk. INR monitoring is required.

Sedatives. Benzodiazepines, sleep medication, opioids and sedating antihistamines all combine additively. This is the most common practical problem and the one that drives falls.

Blood pressure medication. Additive hypotension, compounding the fall risk.

Broad enzyme effects. CBD inhibits several cytochrome P450 enzymes that clear a wide range of prescriptions.

Bring a full medication list, including supplements, to any conversation about starting cannabis.

Where the Case Is Reasonable

Chronic pain. Moderate general evidence, and relevant given that NSAIDs carry gastrointestinal, renal and cardiovascular risk in older adults, and opioids carry their own problems.

Sleep. Effective short term, with tolerance and next-morning grogginess as specific concerns given fall risk.

Arthritis. Topicals are the lowest-risk entry point, with no intoxication and no interactions.

Appetite. Occasionally useful where poor intake is a concern.

Dementia-related agitation. Studied with limited evidence. A small trial of nabilone reported reduced agitation in Alzheimer's disease, alongside sedation. This is an area of genuine research interest and not established treatment, and it should be specialist-supervised.

Where To Be Most Careful

Cognitive impairment or dementia. THC adds acute cognitive impairment to an existing deficit, and can cause confusion or perceptual disturbance.

History of psychosis. Unfavourable risk profile at any age.

Driving. Impairment combines with age-related changes, and older adults may underestimate it.

Edible dosing. Delayed onset plus slowed metabolism is a recipe for accidental overconsumption. Starting at 1 mg to 2.5 mg THC is appropriate, and retail units of 10 mg should be divided.

Bottom Line

Older adults have good reasons to consider cannabis and the least room for a dosing error. Falls are the risk with the worst consequences, driven by sedation and orthostatic hypotension combining with existing instability. Interactions with anticoagulants and sedatives are the most common problem. Topicals for joint pain are the safest starting point, and systemic dosing should start lower than any product label suggests.

Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional before making any health-related decisions.