The nurse instructs a cardiac patient about the freshness of nitroglycerin sublingual tablets. The nurse tells the patient that the medication: (Select all that apply.)
1. should be replaced every 3 months.
2. is no longer good if there is burning under the tongue.
3. should cause a throbbing in the head.
4. should not cause a headache.
1, 3
Nitroglycerin should be replaced every 3 months. There should be a burning sensation under the tongue and a throbbing feeling in the head after taking nitroglycerin.
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