Addiction in Older Adults: An Underrecognized and Undertreated Problem

Introduction

Substance use disorders in older adults are significantly underrecognized and undertreated. The "invisible epidemic" of addiction among people over 60 is growing rapidly — driven by the aging of the baby boomer generation, which has historically higher rates of substance use than previous generations, and by the increasing prescription of opioids and benzodiazepines to older adults. Understanding the unique features of addiction in older adults — including different risk factors, presentations, and treatment needs — is essential for providing effective care.

Key Definitions

Late-onset addiction: Substance use disorder that develops for the first time in older adulthood, often in response to life stressors such as retirement, bereavement, or chronic pain.

Early-onset addiction: Substance use disorder that began earlier in life and has persisted into older adulthood. Associated with more severe health consequences.

Pharmacokinetic changes: Age-related changes in drug absorption, distribution, metabolism, and excretion that affect how drugs behave in the body. Older adults are more sensitive to the effects of many substances.

Polypharmacy: The concurrent use of multiple medications, common in older adults. Increases the risk of drug interactions with substances of misuse.

CAGE questionnaire: A validated screening tool for alcohol use disorder. Less sensitive in older adults than in younger populations.

Prevalence and Trends

Substance use disorders in older adults are more common than many healthcare providers realize:

• Approximately 1 million Americans over 65 have alcohol use disorder.
• Prescription drug misuse is the most common substance use problem in older adults, affecting an estimated 2.5 million people over 60.
• Illicit drug use among older adults is increasing — driven by the aging of the baby boomer generation. Between 2015 and 2019, illicit drug use among adults over 65 increased by 71%.
• Opioid overdose deaths among older adults have increased dramatically, driven by both prescription opioid misuse and illicit fentanyl.

Unique Risk Factors in Older Adults

Older adults face unique risk factors for substance use disorders:

Life transitions: Retirement, bereavement, social isolation, and loss of purpose are common in older adulthood and are associated with increased substance use. Late-onset alcohol use disorder often develops in response to these stressors.

Chronic pain: Chronic pain is extremely common in older adults and is a major driver of opioid and benzodiazepine use. The prescription of opioids and benzodiazepines for chronic pain in older adults is associated with high rates of dependence and addiction.

Insomnia: Sleep problems are common in older adults and are a major driver of benzodiazepine and alcohol use. Benzodiazepines prescribed for insomnia in older adults carry high risks of dependence, falls, and cognitive impairment.

Depression and anxiety: Depression and anxiety are common in older adults and are associated with increased substance use as self-medication.

Social isolation: Social isolation — increasingly common in older adulthood — is associated with increased substance use and worse treatment outcomes.

Physiological Changes That Increase Risk

Age-related physiological changes make older adults more sensitive to the effects of substances:

Reduced body water: Older adults have less body water than younger adults, meaning that the same dose of alcohol produces higher blood alcohol concentrations.

Reduced liver function: Age-related reductions in liver function slow the metabolism of alcohol and many drugs, prolonging their effects.

Reduced kidney function: Age-related reductions in kidney function slow the excretion of drugs and their metabolites.

Increased brain sensitivity: The aging brain is more sensitive to the effects of CNS depressants — alcohol, opioids, benzodiazepines — increasing the risk of falls, cognitive impairment, and overdose.

Health Consequences

Falls and fractures: Alcohol and benzodiazepine use dramatically increase fall risk in older adults. Falls are the leading cause of injury death in people over 65, and substance use is a major contributing factor.

Cognitive impairment: Alcohol and benzodiazepine use accelerate cognitive decline in older adults and increase the risk of dementia. Distinguishing substance-induced cognitive impairment from Alzheimer's disease can be challenging.

Drug interactions: Older adults typically take multiple medications, and substance use can produce dangerous interactions. Alcohol interacts with many common medications including warfarin, metformin, and many cardiovascular drugs.

Cardiovascular: Alcohol use increases the risk of atrial fibrillation, hypertension, and heart failure in older adults.

Screening and Diagnosis

Substance use disorders in older adults are frequently missed because:

• Symptoms may be attributed to aging or medical conditions rather than substance use.
• Older adults may be less likely to disclose substance use due to shame or fear of judgment.
• Standard screening tools may be less sensitive in older adults.
• Healthcare providers may not routinely screen older adults for substance use.

The AUDIT (Alcohol Use Disorders Identification Test) and CAGE questionnaire are commonly used screening tools, though they may need to be adapted for older adults. The SMAST-G (Short Michigan Alcoholism Screening Test — Geriatric Version) is specifically designed for older adults.

Treatment

Older adults respond well to addiction treatment when it is tailored to their needs:

Age-appropriate treatment: Treatment programs designed for older adults — addressing age-specific stressors, using age-appropriate peer support, and accommodating physical limitations — are more effective than standard programs.

Medications: MAT medications are effective in older adults, though dosing adjustments may be needed due to age-related pharmacokinetic changes. Naltrexone, buprenorphine, and acamprosate are all used in older adults.

Addressing co-occurring conditions: Depression, anxiety, chronic pain, and insomnia — which drive substance use in older adults — must be addressed as part of comprehensive treatment.

Social support: Addressing social isolation — through senior centers, volunteer programs, and peer support — is an important component of treatment for older adults.

Frequently Asked Questions

Is it too late to get help for addiction in older adulthood?
Absolutely not. Older adults respond well to addiction treatment and can achieve significant health benefits from recovery, even late in life. The liver, brain, and cardiovascular system all show recovery with abstinence, even in older adults.

Are benzodiazepines safe for older adults?
No. Benzodiazepines are on the Beers Criteria — a list of medications that are potentially inappropriate for older adults — due to their risks of falls, cognitive impairment, and dependence. They should generally be avoided in older adults, with rare exceptions.

Key Takeaways

• Substance use disorders in older adults are significantly underrecognized and undertreated.
• Unique risk factors include life transitions, chronic pain, insomnia, depression, and social isolation.
• Age-related physiological changes make older adults more sensitive to the effects of substances.
• Older adults respond well to age-appropriate addiction treatment.
• Addressing co-occurring conditions — depression, anxiety, chronic pain, insomnia — is essential for effective treatment in older adults.

Additional Resources

Related articles on Sobriety Navigator: Alcohol Use Disorder, Prescription Drug Misuse, Benzodiazepine Dependence, Cognitive Recovery Timeline.