A nurse is teaching a patient about the use of sildenafil [Viagra] for erectile dysfunction. Which statement by the patient indicates understanding of the teaching?
"This drug may cause me to have an erection when I don't want one."
"If my erection lasts longer than 6 hours, I should contact my provider."
"If I have chest pain with sildenafil, I can use my nitroglycerin as prescribed."
"I should take this drug 5 minutes before sexual activity."
The Correct Answer is B
A. While sildenafil can cause erections, it does not typically lead to unwanted erections; it requires sexual stimulation to be effective.
B. An erection lasting longer than 6 hours, known as priapism, is a serious side effect and requires immediate medical attention, indicating the patient understands this risk.
C. Using nitroglycerin with sildenafil can lead to dangerous drops in blood pressure, and patients should be advised to avoid this combination.
D. Sildenafil should be taken about 30 minutes to 1 hour before sexual activity for best results, not just 5 minutes prior.
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Correct Answer is C
Explanation
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B. Dairy does not interfere with metronidazole's absorption or effectiveness, so it is not a contraindication.
C. Alcohol should be strictly avoided during and for at least 48 hours after metronidazole treatment, as it can cause a severe reaction, including nausea, vomiting, flushing, and rapid heart rate.
D. Tyramine-based foods do not interact with metronidazole, so they are not a contraindication for this medication.
Correct Answer is B
Explanation
A. Black-colored stools may indicate gastrointestinal bleeding, which is not a common side effect of rifampin.
B. Rifampin is known to cause orange-colored secretions, including urine, sweat, and tears, which is a normal and expected side effect.
C. Rifampin does not typically cause staining of teeth; this is more commonly associated with other medications like tetracyclines.
D. Constipation is not a recognized side effect of rifampin, and patients are not typically advised to expect this as a result of the medication.