Difficulty: Medium
Average Score: 69%
Simulated
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?
Correct answer
C
Rationale
The correct answer is C: Isosorbide. Isosorbide is a contraindication to taking sildenafil because both medications are vasodilators and can cause a significant drop in blood pressure when taken together, leading to hypotension and potential cardiovascular complications. Metronidazole (A), Phenytoin (B), and Prednisone (D) do not have known interactions with sildenafil related to erectile dysfunction.