ARB medication: the quick, practical guide

ARBs (angiotensin receptor blockers) are a common choice for treating high blood pressure, protecting kidneys in diabetes, and helping some people with heart failure. They lower blood pressure without the cough many people get from ACE inhibitors. Want to know which ARB might fit you, what to watch for, and how to cut costs? Read on.

How ARBs work and common drugs

ARBs block angiotensin II from tightening blood vessels. That relaxes vessels, lowers blood pressure, and reduces strain on your heart. Common ARBs you’ll see: losartan, valsartan, candesartan, irbesartan, telmisartan and olmesartan. Most come as generics now, which makes them cheaper.

Doctors pick an ARB for people who can’t tolerate ACE inhibitors (often because of a dry cough) or for patients with diabetic kidney disease because ARBs help slow kidney damage. If you have other conditions, like certain heart problems, an ARB may be part of your treatment plan too.

Practical safety tips and what to expect

Before starting an ARB, your doctor will usually check your blood pressure, potassium level, and kidney function. ARBs can raise potassium and affect kidney function, so regular blood tests are normal—usually within 1–2 weeks after starting and after dose changes.

Common side effects are mild: dizziness (especially when standing), headache, and fatigue. Serious problems are rare but include high potassium levels and kidney issues. Do not take ARBs if you are pregnant or planning pregnancy—these drugs can harm the fetus.

Avoid using potassium supplements or salt substitutes that contain potassium while on an ARB, unless your doctor tells you it’s safe. Also be cautious with NSAID painkillers (ibuprofen, naproxen); they can blunt the blood-pressure benefit and affect kidneys when combined with ARBs.

If you miss a dose, take it as soon as you remember unless it’s near the next dose—don’t double up. If you feel faint or unusually weak, sit or lie down and call your doctor.

Looking to save on ARBs? Ask for generic names (for example, losartan instead of a brand name). Many online and local pharmacies offer cheaper generics. If you shop online, pick reputable pharmacies and watch for proper licensing. Our site has reviews and shopping tips to help you avoid shady sellers.

Finally, keep a simple health checklist: record your blood pressure at home, bring any medicines and supplements to appointments, and report new symptoms like swelling, severe dizziness, or unusual muscle weakness. With basic monitoring and a clear plan, ARBs are safe and effective tools for managing blood pressure and protecting long-term health.