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Table 6 Prescribed drugs’ doses of the top-10 interactions

From: Potential drug-drug interactions among pneumonia patients: do these matter in clinical perspectives?

Interacting pair

Dose categoriesa

Prescribed dose regimen

Number of patients

Aspirin + Furosemide

Low + Low

75 mg OD + 40 mg OD

17

Low + High

75 mg OD + 60 mg OD

10

Low + Low

75 mg OD + 20 mg OD

5

Low + High

75 mg OD + 100 mg OD

3

Low + High

75 mg OD + 40 mg BD

2

Low + High

75 mg OD + 60 mg BD

2

Low + High

75 mg OD + 80 mg OD

1

Furosemide + Hydrocortisone

Low + High

40 mg OD + 100 mg QID

5

High + High

80 mg OD + 100 mg QID

4

Low + Low

40 mg OD + 250 mg OD

3

High + Low

60 mg OD + 50 mg QID

3

High + High

60 mg OD + 100 mg QID

3

Low + High

20 mg OD + 100 mg QID

3

Low + High

20 mg OD + 500 mg OD

2

Low + Low

40 mg OD + 50 mg QID

2

High + Low

60 mg OD + 250 mg OD

2

High + Low

40 mg BD + 50 mg BD

1

Low + High

40 mg OD + 250 mg TDS

1

High + High

60 mg OD + 500 mg TDS

1

High + Low

60 mg BD + 100 mg TDS

1

Low + Low

40 mg OD + 100 mg BD

1

High + Low

60 mg OD + 100 mg BD

1

High + High

80 mg BD + 100 mg QID

1

High + Low

60 mg BD + 250 mg OD

1

High + Low

80 mg OD + 250 mg OD

1

High + High

100 mg OD + 100 mg QID

1

High + High

80 mg OD + 500 mg QID

1

High + Low

60 mg BD + 50 mg TDS

1

Aspirin + Clopidogrel

Low + Low

75 mg OD + 75 mg OD

35

High + Low

150 mg OD + 75 mg OD

1

High + Low

300 mg OD + 75 mg OD

1

Aspirin + Insulin

Low + High

75 mg OD + 20–40 units/day

21

Low + High

75 mg OD + > 40 units/day

6

Low + Low

75 mg OD + < 20 units/day

5

High + Low

150 mg OD + 20 units/day

1

Isoniazid + Rifampin

Low + Low

75 mg OD + 150 mg OD

27

High + High

150 mg OD + 300 mg OD

6

Calcium containing products + Ceftriaxone

Low + Low

200 mg/L OD + 2 g OD ATD

7

Low + High

200 mg/L BD + 2 g BD ATD

5

Low + Low

200 mg/L BD + 2 g OD ATD

4

High + Low

1 g OD + 2 g OD ATD

4

Low + Low

200 mg/L OD + 1 g BD ATD

3

Low + Low

200 mg/L TDS + 2 g OD ATD

2

High + High

1 g OD + 2 g BD ATD

1

Low + Low

200 mg/L BD + 1 g BD ATD

1

Low + Low

200 mg/L OD + 1 g OD ATD

1

Low + Low

200 mg/L BD + 1 g OD ATD

1

Low + High

200 mg/L BD + 3 g BD ATD

1

Low + High

200 mg/L OD + 4 g OD ATD

1

High + High

1250 mg BD + 2 g BD ATD

1

High + Low

1250 mg OD + 2 g OD ATD

1

Pyrazinamide + Rifampin

Low + Low

400 mg OD + 150 mg OD

28

High + High

500 mg OD + 300 mg OD

4

Aspirin + Ramipril

Low + Low

75 mg OD + 2.5 mg OD

20

Low + High

75 mg OD + 5 mg OD

4

Low + High

75 mg OD + 10 mg OD

3

Low + Low

75 mg OD + 1.25 mg OD

1

Albuterol + Furosemide

High + Low

5 mg/ml TDS + 40 mg OD

13

High + High

5 mg/ml TDS + 60 mg OD

8

High + Low

5 mg/ml TDS + 20 mg OD

4

High + High

5 mg/ml TDS + 40 mg BD

1

Low + Low

50mcg/actuation TDS + 40 mg OD

1

Low + High

2 mg OD + 80 mg BD

1

Aspirin + Bisoprolol

Low + Low

75 mg OD + 2.5 mg OD

14

Low + High

75 mg OD + 5 mg OD

7

High + High

300 mg OD + 5 mg OD

1

High + Low

150 mg OD + 2.5 mg OD

1

  1. OD Once a day, BD Twice a day, QID Four times a day, TDS Three times a day, ATD Alternate day
  2. aThe following cut off points were used for defining higher daily doses, furosemide: ≥60 mg; hydrocortisone: ≥500 mg; aspirin: ≥150 mg; insulin: > 20 units; isoniazid: ≥150 mg; rifampin: ≥300 mg; calcium containing products: ≥1 g; ceftriaxone: ≥4 g; pyrazinamide: ≥500 mg; ramipril: ≥5 mg; albuterol: ≥15 mg/3 ml; bisoprolol: ≥5 mg