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Table 10 Cardiovascular nurses’ knowledge on warfarin-drug interactions

From: Education and practice gaps on atrial fibrillation and anticoagulation: a survey of cardiovascular nurses

Question n (%) n (%) n (%) n (%)  
  Enhance Inhibit No effect Don’t know Rating Count
How to these anti-inflammatory agents affect oral warfarin anticoagulant therapy?
 • Aspirin
 • Ibuprofen
 • Topical salicylates
34 (69)
23 (48)
11 (23)
2 (4)
8 (17)
3 (6)
9 (18)
9 (18)
11 (23)
4 (8)
8 (17)
23 (48)
49
48
48
How do these cardiac agents affect oral warfarin anticoagulant therapy?
 • Propanolol
 • Cholestyramine
 • Atenolol
7 (15)
0 (0)
5 (11)
2 (4)
10 (21)
1 (2)
15 (32)
6 (13)
20 (44)
23 (49)
32 (67)
20 (44)
47
48
46
How do these gastrointestinal agents affect warfarin anticoagulant therapy?
 • Antiacids
 • Cimetidine
 • Metamucol
 • Sucralfate
0 (0)
4 (9)
1 (2)
0 (0)
23 (49)
11 (24)
10 (22)
10 (22)
7 (15)
4 (9)
5 (11)
5 (11)
17 (36)
27 (59)
30 (65)
30 (67)
47
46
46
45
How do these vitamin supplement (s) affect oral anticoagulant therapy?
 • Multivitamin
 • Multivitamin and minerals
 • Antioxidant formula
 • 1200 IU vitamin E
 • 1000 mg vitamin C
2 (4)
2 (4)
7 (16)
18 (39)
4 (9)
9 (20)
9 (20)
3 (7)
5 (11)
3 (7)
15 (33)
15 (33)
9 (21)
3 (7)
12 (27)
19 (42)
19 (42)
25 (57)
20 (44)
26 (58)
45
45
44
46
45
Most antibiotics affect warfarin therapy by the process of:
 • Potentiation
 • Inhibition
 • Both
 • Neither(other process)
  7 (23)
5 (17)
6 (19)
1 (4)
0 (0)
0 (0)
1 (4)
2 (8)
24 (78)
25 (84)
25 (78)
23 (89)
31
30
32
26
  1. Correct answers are shown in bold