Alpha blockers are substances that antagonize alpha receptors which are located primarily in smooth muscle. This acts to vasodilate in the arterial system and, thus, these agents are used to treat ...

Because of this, they could build up in your blood and become toxic to your body. Alpha-blockers. After you take these drugs for the first time, you may have a “first dose” effect. This can ...

So as they squeeze the urethra they block the flow as well, and that's another whole category of medications called alpha blockers that relax those muscles. Sheldon Marks, MD (cont.) The advantage ...