The story
From tam- (of unknown origin) + sul(fonamide) + -osin (“α₁-adrenoceptor antagonist”).
Etymology from Wiktionary, CC BY-SA 4.0.
tamsulosin
Today it means: An alpha-adrenergic blocking agent administered orally in the form of its hydrochloride C₂₀H₂₈N₂O₅S·HCl to treat benign prostatic hyperplasia. Full definition →