What statements by the 54-year-old patient indicates an understanding of the nurse's teaching about how to take sublingual nitroglycerin?
A) "A headache means a toxic level has been reached."
B) "I can take up to 3 tablets at 5-minute intervals."
C) "I can take as much nitroglycerin as I need because it is not habit forming."
D) "If I become dizzy after taking the medication, I should stop taking it."
B
Feedback:
Sublingual nitroglycerin may be taken at 5-minute intervals up to a maximum of three doses to relieve anginal chest pain. Headaches are very common due to vasodilation and do not indicate a toxic level. Nitroglycerin causes significant peripheral vasodilation in addition to its therapeutic effects of coronary artery dilation so no more than three tablets should be taken, even though it is not habit forming. Dizziness could be an adverse effect of the drug or a manifestation of inadequate cardiac output, but it would not indicate the patient should stop taking it.
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