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Table 3 Most common potentially inappropriate prescriptions (PIPs) among older patients receiving medication in long-term care

From: Potentially inappropriate prescriptions for older patients in long-term care

Criteria

Number of patients

Proportion of all patients prescribed a medication (%) (N = 2,481)

Potentially inappropriate medication

365

14.7

   Long-acting benzodiazepines

138

5.6

   Preparations including an antihistaminic

112

4.5

   Flurazepam

54

2.2

   Doxepin

31

1.3

   Amitryptiline

27

1.1

   Propanolol

27

1.1

   Chloral hydrate

22

0.9

Potentially inappropriate duration

585

23.6

   Intermediate and short-acting benzodiazepines at bedtime for more than one month

567

22.9

   Oxazepam at bedtime for more than one month

313

12.6

Potentially inappropriate dosage

239

9.6

   Haloperidol > 3 mg daily

129

5.2

   Thioridazine > 30 mg daily

53

2.1

   Lorazepam > 3 mg daily

34

1.4

Potential drug-drug interaction

842

33.9

   Repeat* prescription of antipsychotics

409

16.5

   Repeat* prescription of benzodiazepine

369

14.9

   Clonazepam and other benzodiazepine

46

1.9

   Benzodiazepine and hypnotic or sedative

93

3.8

   Repeat* prescription of calcium channel blockers

77

3.1

   Repeat* prescription of tricyclic antidepressants

37

1.5

   Repeat* prescription of angiotensin converting enzyme inhibitors

19

0.8

   Repeat* prescription of β-blockers

11

0.4

   Repeat* prescription of non-steroidal anti-inflammatory drugs (except acetylsalicylic acid)

10

0.4

   Repeat* prescription of barbiturate

10

0.4

Total potential inappropriate prescriptions**

1,358

54.7

  1. *Repeat prescription indicates that two agents of the same drug class are being prescribed
  2. **Numbers do not add up since one prescription may be linked to more than one PIP (e.g., duration and dosage)