🏥 USMLE Exam Prep

A 65-year-old male with a history of hypertension and benign prostatic hyperplasia (BPH) is prescribed a new medication for his BPH. Within a week, he develops orthostatic hypotension and dizziness. Which of the following classes of medications was most likely prescribed?

A 5-alpha reductase inhibitor (e.g., finasteride).
B Muscarinic antagonist (e.g., oxybutynin).
C Alpha-1 adrenergic antagonist (e.g., prazosin).
D Phosphodiesterase-5 inhibitor (e.g., sildenafil).

✓ Correct Answer: Option C

Alpha-1 adrenergic antagonists, used for BPH, can cause orthostatic hypotension due to their vasodilatory effects, especially in patients with existing hypertension or on antihypertensive medications.

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