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Table 2 Response to questions

From: Evaluation of patients’ knowledge on warfarin in outpatient pharmacy of a tertiary care cardiac center

Questions

Incorrect answer (percentage)

Non-steroidal drug choice

44.1

Food warfarin interaction

76.4

Warfarin effect leading to emergency unit

58.8

Managing missed dose

55.8

Spinach intake frequency

70.5

Interaction with alcohol

73.5

Action to take when buying multivitamin

23.5

Action to take when you run out of prescription

29.4

Most likely side effect of warfarin

67.6

Action to take when buying cold medication

61.7

Action to take when taking dental appointment

23.5

Action to take when taking antibiotic

58.8

Action of warfarin

79.4

Best time to take warfarin

14.7

Effect seen when INR is high

41.1

Drink decreasing warfarin effectiveness

94.1

Situation where visiting emergency is essential

61.7

Action in taking herbal supplements

67.6

Frequency of PT/INR test

44.1

PT/INR test result indicates

44.1

Side effect to be informed to Coumadin clinic

70.5

Test to be carried out routinely

50

Interaction of over-the-counter drugs with warfarin

47

Warfarin effect requiring emergency unit visit

44.1

warfarin food interaction

26.4

Action to take if you have both generic and brand of warfarin

44.1

Time warfarin stays in body system

82.3

Length of time warfarin needs to be taken

94.1

Most risky activity to avoid while on warfarin

32.3