Polypharmacy in Older Adults: Drug Interactions, the Beers Criteria, and Deprescribing
Polypharmacy—the concurrent use of 5 or more prescription medications—affects over 40% of older adults, significantly increasing the risk of adverse drug reactions, cognitive decline, falls, and prescribing cascades. Review the AGS Beers Criteria for potentially inappropriate medications, anticholinergic burden, and structured deprescribing protocols.
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Quick Summary & Key Findings
Polypharmacy is defined as taking 5 or more daily medications and is a major risk factor for adverse drug events, delirium, orthostatic hypotension, and falls in older adults due to age-related declines in hepatic clearance and renal elimination. The American Geriatrics Society (AGS) Beers Criteria identifies high-risk drugs that should generally be avoided or deprescribed in seniors, including first-generation antihistamines (diphenhydramine), benzodiazepines, long-term PPIs, and non-selective NSAIDs.
In geriatric medicine, medications that were safe and clinically appropriate in midlife often become hazardous as the body ages. Natural pharmacokinetic and pharmacodynamic shifts—including decreased glomerular filtration rate (eGFR), diminished hepatic cytochrome P450 enzyme activity, decreased total body water, and increased relative adipose tissue—alter drug clearance and prolong biological half-lives.
Polypharmacy is defined as the regular use of five or more medications, while 'hyperpolypharmacy' describes regimens containing ten or more daily drugs. In many cases, polypharmacy arises through a 'prescribing cascade': an adverse drug side effect is misdiagnosed as a new medical condition, prompting the addition of another prescription drug to treat the symptom caused by the first.
Conducting regular, structured medication reviews and utilizing the evidence-based AGS Beers Criteria allows clinicians, patients, and caregivers to safely deprescribe inappropriate medications, reduce adverse interactions, and improve quality of life.
The AGS Beers Criteria: High-Risk Medications in Seniors
Cumulative Anticholinergic Burden and Cognitive Decline
The 5-Step Clinical Deprescribing Protocol
Frequently Asked Questions
Dr. Prasun Chatterjee, MBBS, MD (Geriatrics)
Professor & Head, Department of Geriatric Medicine, AIIMS New Delhi • MBBS, MD (Geriatric Medicine)Dr. Prasun Chatterjee is Professor in the Department of Geriatric Medicine at the All India Institute of Medical Sciences (AIIMS), New Delhi. A leading authority on healthy longevity, memory clinics, dementia care, and geriatric polypharmacy, he oversees clinical guidance on senior health and longevity.
References & Clinical Resources
- Clinical Research Faculty & Editorial Team. American Geriatrics Society 2023 Updated AGS Beers Criteria for Potentially Inappropriate Medication Use in Older Adults (2020-2026). [Access Resource Link] — Journal of the American Geriatrics Society (JAGS)
- Clinical Research Faculty & Editorial Team. Deprescribing in Older Adults with Multimorbidity and Polypharmacy (2020-2026). [Access Resource Link] — JAMA / Journal of the American Medical Association
- Clinical Research Faculty & Editorial Team. STOPP/START Criteria for Potentially Inappropriate Prescribing in Older People: Version 3 (2020-2026). [Access Resource Link] — European Geriatric Medicine
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Reader Reviews & Clinical Q&A
Real experiences, reader questions, and verified physician guidance.
At 72, I was concerned about muscle loss and fatigue. Implementing the protein distribution and resistance training suggestions here has significantly improved my balance and energy levels.
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The inclusion of the AGS Beers Criteria and anticholinergic risk scores makes this an invaluable educational asset for patients and families navigating polypharmacy.
Deprescribing and medication reconciliation are critical safety imperatives in geriatric care, Dr. Steven. Thank you for championing patient safety.