The Consultant Pharmacist is published by the
American Society of Consultant Pharmacists.

Helpful Ideas

Inappropriate Use Criteria: Covering All the Bases

Problem: Indices or lists of medications generally considered inappropriate for use in the elderly are a great aid to drug regimen review, but I've seen several different lists. Which is best?

Solution: Instead of relying on any one index, use all available tools in a complementary manner.


"Any symptom in an elderly patient should be considered a drug side effect until proved otherwise." That's how Brown University pharmacoepidemiologist Jerry Avorn couches the paramount importance of medication effects, side effects, and misadventures as a driver of geriatric health problems.

Embracing this dictum wholeheartedly, long-term care pharmacists have moved in recent years to develop well-defined criteria, or indicators, for inappropriate drug use in elderly populations. Intended to assist pharmacists in targeting drug regimen review (DRR) activities, these indicators typically include a list of medications that should be avoided in the elderly unless there is clear evidence in each case that the potential benefits outweigh the potential risks. At the very least, use of any listed drug by a geriatric patient should put the pharmacist on the lookout for trouble.

Two such lists were recently published in this journal (Consult Pharm 1998;13:160-73). Developed by Brown University gerontologist Mark Beers, MD, one list is specific to nursing facility populations; the other is more broadly applicable to any person age 65 or older. "These two lists are great DRR aids-but they're not the only ones out there," says ASCP Director of Professional Affairs Tom Clark. "Other researchers have developed different lists with different formats, different references, and different approaches to explaining the need for special caution and characterizing the risk to patients."

ASCP's 1997-98 Professional Affairs Council has looked at several such lists over the past few months while working in response to a charge by ASCP President Jan Allen to develop DRR indicators for use in nursing facilities. One document the council will likely incorporate into its recommendations is presented here (see box on next page). Compiled by Clark, this list differs from those developed by Beers in several ways, he notes. "First, it includes additional references not cited by Beers. Second, it's broader, including several drugs not mentioned in the Beers documents. Third, this new lists cites a specific rationale for avoiding use of certain drugs in the elderly, rather than simply categorizing the severity of effects that can occur."

Consultant pharmacists may want to consider adding this document to their armamentarium of DRR tools, Clark says. "Rather than boxing yourself into using just one tool, why not use more than one? In this context, more is definitely better."

David K. Buerger
Senior Editor


Drugs Potentially Inappropriate for Geriatric Use

Medication
Reference
Rationale
Medication
Reference
Rationale
Amitriptyline1, 3, 6 AGlutethimide*2 B
Amobarbital*2, 3 BHyoscyamine3, 6 A
Belladonna alkaloids3, 6 AIndomethacin1, 3, 6 G
Butabarbital*2, 3 BIsoxsuprine1, 6 F
Carisoprodol1, 3, 6C Meperidine (oral)3, 4 G
Chlordiazepoxide*1, 3, 6 DMeprobamate*1, 2, 3, 6 B,G
Chlorpropamide1, 3, 6 EMetaxalone3 C
Chlorzoxazone3C Methocarbamol1, 3, 4, 6 C
Clidinium3, 6A Methyldopa3G
Cyclandelate1, 3, 6F Orphenadrine1, 6C
Cyclobenzaprine1, 3, 4, 6 COxybutynin3, 5 A
Diazepam*1, 3, 6 DPentazocine1, 3, 4, 6 G
Dicyclomine3, 6 APentobarbital*1, 2, 3, 6 B,G
Dipyridamole1, 4, 6F Propantheline3 A
Disopyramide3, 4 APropoxyphene1, 3, 6 G
Doxepin3A Reserpine3, 4, 6G
Ergot mesyloids3F Secobarbital*1, 2, 3, 6 B,G
Ethchlorvynol*2B Trimethobenzamide1, 3, 6 F
Flurazepam*1, 3, 6 D   


Rationale key:

A = Anticholinergic side effects

B = Addictive

C = Minimally effective and toxic

D = Increases risk of falls and fractures, short half-life benzodiazepines preferred

E = Excessive risk of hypoglycemia due to long half-life

F = Lack of evidence of effectiveness

G = Increased risk of toxicity; safer alternatives available

* Therapy should not be initiated with these agents in the elderly. When an elderly patient is already taking these medications, downward dose titration should be very gradual.

Note: Boldface "3" indicates risk of high-severity side effects, according to consensus of the authors of cited reference.

References:

1. Beers MH, Ouslander JG, Rollinger I et al. Explicit criteria for determining inappropriate medication use in nursing home residents. Arch Intern Med 1991\ ; 151:1825-32.

2. American Society of Consultant Pharmacists. 1995. Nursing Home Survey Procedures and Interpretive Guidelines. Alexandria, VA.

3. Beers MH. Explicit criteria for determining potentially inappropriate medication use by the elderly. Arch Intern Med 1997;157:1531-36.

4. McLeod PJ, Huang AR, Tamblyn RM et al. Defining inappropriate practices in prescribing for elderly people: national consensus panel. Can Med Assoc J 1997;156:385-91.

5. Katz IR, Sands LP, Bilker W et al. Identification of medications that cause cognitive impairment in older people: the case of oxybutynin chloride. J Am Geriatr Soc 1998;46:8-13.

6. Stuck AE, Beers MH, Steiner A et al. Inappropriate medication use in community-residing older persons. Arch Intern Med 1994;154:2195-200.


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The Consultant Pharmacist is published by the
American Society of Consultant Pharmacists.