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7) A 65- year- old retired truck driver who smokes a pack of cigarettes daily is diagnosed with essential hypertension. He has no previous history of cardiovascular disease or sexual dysfunction. In the primary care physician’s office, his blood pressure is 170/95 mmHg. He is prescribed a single therapeutic agent. Shortly after the beginning of the treatment, he experiences difficulties in obtaining and maintaining an erection.

What medication is most likely to have caused this adverse effect?

A) Hydrochlorothiazide
B) Enalapril
C) Losartan
D) Prazosin
E) Verapamil

Explanation will be posted soon....
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