Angiotensin Receptor Blockers (ARBs) | Short Notes | Hypertension Pharmacology

Angiotensin Receptor Blockers (ARBs) | Mechanism of Action, Uses, Adverse Effects & ACE Inhibitors Comparison Master Angiotensin Receptor Blockers (ARBs) in one comprehensive pharmacology lecture. This video explains the mechanism of action, renin-angiotensin-aldosterone system (RAAS), therapeutic uses, adverse effects, and the key differences between ARBs and ACE inhibitors in a simple, examination-oriented manner. Whether you're preparing for MBBS Pharmacology, NEET PG, INI-CET, FMGE, USMLE, NCLEX, nursing, or pharmacy examinations, this video provides a concise yet complete revision of this important antihypertensive drug class. 📚 Topics Covered ✅ What are Angiotensin Receptor Blockers (ARBs)? Introduction to ARBs (Sartans) Overview of the Renin-Angiotensin-Aldosterone System (RAAS) ✅ Mechanism of Action AT1 receptor blockade Vasodilation Reduced aldosterone secretion Reduced sympathetic activity Bradykinin sparing mechanism ✅ Why ARBs Cause Less Cough Bradykinin sparing Why dry cough is rare Lower risk of angioedema Comparison with ACE inhibitors ✅ Therapeutic Uses Essential hypertension Diabetic nephropathy Chronic kidney disease (CKD) Heart failure Post-myocardial infarction Prevention of ventricular remodelling ✅ Adverse Effects Hyperkalemia Hypotension and dizziness Renal impairment Bilateral renal artery stenosis Teratogenicity Contraindications in pregnancy ✅ ARBs vs ACE Inhibitors Bradykinin metabolism Dry cough Angioedema Clinical advantages Preferred indications 🎯 High-Yield Examination Points ✔ ARBs selectively block AT1 receptors. ✔ They lower blood pressure by reducing vasoconstriction, aldosterone secretion, and sympathetic activity. ✔ They do not inhibit bradykinin breakdown, making dry cough and angioedema much less common than with ACE inhibitors. ✔ They are widely used in hypertension, diabetic nephropathy, chronic kidney disease, heart failure, and after myocardial infarction. ✔ ARBs are contraindicated during pregnancy because of teratogenicity. ✔ Monitor serum potassium and renal function during therapy. This lecture is designed for: MBBS Students BDS Students Nursing Students Pharmacy Students Pharmacology Postgraduates NEET PG Aspirants INI-CET Aspirants FMGE Aspirants USMLE Aspirants Healthcare Professionals If you found this video helpful, Like, Share, and Subscribe to Pharmacology Essentials for more high-yield pharmacology lectures, viva questions, short notes, and quick revision videos. #Pharmacology #ARBs #AngiotensinReceptorBlockers #Sartans #ACEInhibitors #Hypertension #RAAS #MechanismOfAction #Cardiology #Nephrology #DiabeticNephropathy #CKD #HeartFailure #MyocardialInfarction #MedicalEducation #MBBS #NEETPG #INICET #FMGE #USMLE #Nursing #Pharmacy