terazosin

noun

te·ra·zo·sin tə-ˈrā-zə-ˌsin

: a drug taken orally in the form of its hydrated hydrochloride C₁₉H₂₅N₅O₄·HCl·2H₂O in the treatment of benign prostatic hyperplasia and hypertension

Other studies have shown that terazosin is more effective in smaller prostates, where contraction of smooth muscle is the major problem, while finasteride is more likely to be effective in larger prostates which contain many more epithelial cells.—

Simeon Margolis, The Baltimore Sun

Note: Terazosin is a derivative of quinazoline that acts to relax smooth muscle by combining with and blocking the activity of an alpha-receptor. It is marketed under the trademark Hytrin.