Table 2.

Prevalence of some measures of polypharmacy, prescribing quality, and potential adverse drug reactions (n = 45)

Measure	Prevalence
Number of drugs [mean (range)]	9.8 (4–21)
Five or more drugs [n (%)]	42 (93.3)
Ten or more drugs [n (%)]	20 (44.4)
Inappropriate drugs [n (%)]	2 (4.4)
Drug duplication [n (%)]	1 (2.2)
Drug–drug interactions, Class C [n (%)]	18 (40)
Drug–drug interactions, Class D [n (%)]	0 (0)
Potential adverse drug reactions [mean (range)]	2.7 (0–12)