Terazosin (Hytrin) is primarily used to treat which of the following conditions?

Terazosin (Hytrin) is an alpha-1 adrenergic antagonist commonly used to treat benign prostatic hypertrophy (BPH) and hypertension. In the case of BPH, terazosin relaxes the smooth muscles of the prostate and bladder neck, which helps alleviate urinary symptoms associated with this condition. For hypertension, terazosin acts by preventing vasoconstriction, thus lowering blood pressure through vasodilation.

The effectiveness of terazosin in these two conditions highlights its role as both a therapeutic option for patients with enlarged prostates who experience urinary difficulties, and for those suffering from high blood pressure. The other options listed do not align with the primary uses of terazosin, reinforcing that A is the most accurate choice. Chronic prostatitis, urinary tract infections, and arrhythmias do not reflect conditions typically treated with terazosin, further solidifying why the selected answer is the most appropriate.