Understanding the Problem: Why Is Inappropriate Medication a Concern for Older Adults?
As people age, their bodies undergo significant physiological changes that affect how medications are absorbed, distributed, metabolized, and eliminated. This can lead to an increased risk of adverse drug events (ADEs), which can have severe consequences, from falls and cognitive impairment to hospitalization and even death. Factors contributing to this risk include multiple comorbidities, polypharmacy (the use of multiple medications), and altered drug sensitivity. Clinicians, caregivers, and older adults themselves must use specific, evidence-based criteria to mitigate these risks and ensure medication regimens are appropriate and safe.
Key Criteria and Tools
Several validated tools and criteria are used to identify potentially inappropriate medication (PIM) use in older adults. These frameworks help healthcare providers evaluate medication regimens based on age-related factors, comorbidities, and potential drug interactions.
The American Geriatrics Society (AGS) Beers Criteria
The AGS Beers Criteria is a widely recognized tool that lists medications and drug classes potentially inappropriate for older adults. It provides categories to guide clinical decisions, including medications to avoid in most older adults, those to avoid with specific conditions, medications to use with caution, significant drug-drug interactions, and drugs requiring dosage adjustment based on kidney function.
The STOPP/START Criteria
The STOPP (Screening Tool of Older Person's Prescriptions) and START (Screening Tool to Alert doctors to Right Treatment) criteria offer a complementary approach. STOPP identifies potentially inappropriate prescribing (overuse), while START highlights potential prescribing omissions (underuse) of beneficial medications. This dual approach provides a more comprehensive review of medication appropriateness.
Comparing Beers and STOPP/START Criteria
| Feature | Beers Criteria | STOPP/START Criteria |
|---|---|---|
| Primary Focus | Overuse of potentially inappropriate medications (PIMs). | Both overuse (STOPP) and underuse (START) of medications. |
| Geographic Origin | United States (American Geriatrics Society). | Ireland/Europe (international application). |
| Approach | Explicit list of specific drugs or drug classes to avoid, with specific caveats. | Explicit lists, but is often seen as more clinically prescriptive and disease-specific. |
| Key Strength | Widely known and regularly updated. Excellent for identifying drugs with unfavorable risk profiles. | Comprehensive, addressing both medication errors of commission and omission. |
| Limitation | Primarily focused on what to stop, not what might be missing from a patient's regimen. | Less known in the US, requiring more familiarity from clinicians. |
The Medication Appropriateness Index (MAI)
The Medication Appropriateness Index (MAI) offers an implicit, patient-centered approach using 10 criteria to evaluate the appropriateness of each medication. These criteria cover indication, effectiveness, dosage, directions, drug interactions, drug-disease interactions, duration, cost, duplication, and patient acceptance.
The Role of Deprescribing
Deprescribing is a crucial process involving the planned reduction or discontinuation of medications that may no longer be beneficial or could be causing harm. This requires a collaborative discussion with the patient and caregivers to align medication regimens with individual health goals and priorities. Key steps include reviewing all medications, assessing patient goals, identifying candidates for deprescribing, planning a gradual taper, and monitoring for effects.
Conclusion: A Multi-faceted Approach
Identifying inappropriate medication use in older adults requires a comprehensive approach utilizing tools like the Beers Criteria, STOPP/START criteria, and MAI, combined with deprescribing principles. This ensures medication regimens are optimized to minimize risks and improve the quality of life for older adults.
An excellent resource for patients and caregivers seeking to better understand this issue is the Health in Aging Foundation, specifically their resource on Medications that Older Adults Should Avoid or use with Caution.