Angiotensin Receptor Blockers (ARBs)
Angiotensin II receptor blockers (ARBs) are a class of pharmaceuticals that selectively block the activation of angiotensin II type 1 receptors (AT1)[1]. These receptors mediate the effects of the renin-angiotensin system,
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![Angiotensin II receptor blockers (ARBs) are a class of pharmaceuticals that selectively block the activation of angiotensin II type 1 receptors (AT1)[1]. These receptors mediate the effects of the renin-angiotensin system, which include arteriolar contraction and sodium retention[1]. By blocking AT1 receptors, ARBs lead to vasodilation, reduced vasopressin secretion, and decreased aldosterone production, ultimately lowering blood pressure[1]. ARBs are commonly known as angiotensin II receptor antagonists or AT~1~ receptor antagonists[1].](https://cdn.drstemcellsthailand.com/wp-content/uploads/2025/02/image-60.png)


![Phlebotomy, also known as venipuncture or blood draw, is the process of collecting blood from a vein, typically in the arm, for diagnostic testing or other medical purposes[1][4][7]. It is a critical skill performed by phlebotomists, nurses, medical lab scientists, and other healthcare workers[1][4].](https://cdn.drstemcellsthailand.com/wp-content/uploads/2025/02/image-31.png)
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