<unk>  is a selective α1 receptor antagonist that has preferential selectivity for the α1A receptor in the prostate versus the α1B receptor in the blood vessels. When alpha 1 receptors in the bladder neck, the prostate, the ureter, and the urethra are blocked, a relaxation in smooth muscle tissue results. This mechanism decreases resistance to urinary flow, reduces discomfort associated with BPH, and facilitates passage of kidney stones. Selective action of<unk>  in alpha 1A/D receptors is controversial and over three quarters of<unk>  registered human studies are unpublished.
Tamsulosin
Terazosin
Doxazosin
Silodosin
Oxybutynin
Erythrocrine
Oxymetazoline
Finasteride