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Cannabis, Falls, and Balance in Older Adults

Falls are the leading cause of injury death in seniors. How acute cannabis use affects balance, the timing of peak intoxication, and how to reduce risk if you use cannabis.

Falls: The Leading Cause of Injury Death After 65

Falls are the leading cause of injury-related death in adults over 65 and the most common cause of traumatic brain injury in this age group. Every year, approximately one in four Americans over 65 falls, and among those who fall, fewer than half tell their physician. Cannabis introduces a measurable additional risk factor that most older users do not fully appreciate. Moderate evidence

What the Research Shows: Worse Balance, False Confidence

A 2021 study by Workman, Sosnoff, and Rudroff published in Brain Sciences provides the most direct evidence of cannabis-related fall risk in older adults. The researchers compared eight chronic cannabis users over age 50 with eight age-matched non-users and found three concerning results:

  1. Significantly higher overall fall risk in cannabis users compared to non-users
  2. Worse one-leg standing balance — a standard clinical measure of postural stability and fall prediction
  3. Slower gait velocity — walking speed is itself a robust predictor of fall risk, hospitalization, and mortality in older adults

The most alarming finding was the disconnect between perceived and actual risk. Cannabis users rated their balance confidence and perceived fall risk as comparable to non-users — despite performing measurably worse on objective tests. This means older cannabis users may take physical risks beyond their actual abilities without recognizing the danger.

Workman, Sosnoff, and Rudroff, Brain Sciences, 2021

Dr. Jerry Gurwitz of UMass Chan Medical School, a geriatric medicine specialist, led a national study of emergency department visits among adults 50 and older linked to cannabinoid products. The findings showed a steep increase:

  • 2020-2021: 4,408 ED visits
  • 2022-2023: 7,490 ED visits — a 70% increase in just two years

Separately, Harvard Health reported that medical visits related to cannabis among adults 65 and older rose 27-fold between 2008 and 2021, with much of the increase attributed to accidental overconsumption — particularly from edibles, where the delayed onset leads seniors to take a second dose before the first has taken effect.

"My general principle as a geriatrician is to prescribe medications only when I know they're efficacious and where we're pretty sure that the benefits in a particular patient will outweigh the risks," Dr. Gurwitz has said. "I can't say that with any certainty in this case."

When Falls Meet Blood Thinners: Compounded Danger

For seniors who take anticoagulants alongside cannabis, the fall risk carries a second layer of danger. As detailed on the Blood Thinners page, CBD inhibits CYP2C9 — the enzyme that metabolizes warfarin — potentially elevating INR above the therapeutic range.

The compounding works like this:

  1. Cannabis impairs balance and coordination, increasing the likelihood of a fall
  2. Cannabis simultaneously interacts with anticoagulant metabolism, potentially thinning the blood beyond therapeutic levels
  3. When the fall occurs, even a minor injury — a bumped elbow, a bruised hip — can produce disproportionate bleeding because the blood is over-anticoagulated

This combination is particularly insidious because each risk factor alone might be manageable, but together they create a cascading hazard that many seniors and their physicians do not anticipate.

Practical Fall Prevention for Cannabis Users

If you choose to use cannabis, these strategies can meaningfully reduce — though not eliminate — fall risk:

  1. Start at nighttime only. Initiate cannabis use while you are already in bed for the night. This eliminates fall exposure during the period of peak effect. Once you understand how a product affects your balance and coordination, you can gradually expand to other times of day.
  2. Fall-proof your home environment. Remove throw rugs, secure electrical cords, install grab bars in bathrooms, keep nightlights on paths between bedroom and bathroom, and ensure stairways are well-lit with sturdy handrails.
  3. Have someone present. During your first several sessions with any new cannabis product or dose, another person should be in the home — ideally aware that you are using cannabis and able to assist if you become unsteady.
  4. Rise slowly from any position. Cannabis can cause orthostatic hypotension (a blood pressure drop upon standing). Take 10-15 seconds at each stage: lying to sitting, sitting to standing, standing to walking.
  5. Keep a walking aid accessible. If you use a cane or walker, keep it within arm's reach when using cannabis — even if you do not normally need it at home.
  6. Avoid combining with sedatives. The sedation-compounding effects of cannabis with benzodiazepines or opioids multiply fall risk beyond either substance alone.
  7. Tell your physician. If you experience any falls or near-falls after starting cannabis, report them — they may indicate that your dose is too high or that an interaction with another medication is amplifying impairment.