A nurse in a provider's clinic is caring for a client who reports erectile dysfunction and requests a prescription for sildenafil. Which of the following medications currently prescribed for the client is a contraindication to taking sildenafil?
Metronidazole
Phenytoin
Isosorbide
Prednisone
The Correct Answer is C
Isosorbide is a nitrate vasodilator used to dilate coronary vessels to relieve angina. Sildenafil also dilates peripheral vessels reducing peripheral vascular resistance. Using the two drugs together may lead to lethal drop in blood pressure and shock.
A, B, and D are not contraindicated with Sildenafil as they do not have any significant drug interactions
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale- Levothyroxine is a synthetic form of thyroxine that is used in the management of symptomatic hypothyroidism. It is used to provide the body with thyroxine to sustain basal metabolism in cases of hypothyroidism.
A-Levofloxacin is a fluoroquinolone antibiotic for treatment of infections
B- Ionizing radiation used in the destroying active thyroid tissue in the cases of hyperthyroidism
C- Sumatriptan is serotonin antagonist used in the treatment of migraines
Correct Answer is D
Explanation
Taking ferrous sulfate between meals enhances its absorption as some food substances can interfere with iron absorption. Therefore, it is generally recommended to take ferrous sulfate on an empty stomach, typically 1 hour before meals or 2 hours after meals. However, if gastrointestinal upset occurs when taking ferrous sulfate on an empty stomach, it can be taken with a small amount of food to minimize discomfort.
A. Antacids containing aluminum, calcium, or magnesium can bind with iron and reduce its absorption.
B. Dairy products, including yogurt, can also inhibit iron absorption due to the presence of calcium.
C. Taking it at bedtime increases the likelihood of gastrointestinal discomfort reducing its effectiveness due to interference from food.
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