Yes, Cozaar Treats High Blood Pressure
Cozaar (losartan) is an angiotensin II receptor blocker (ARB) approved by the FDA to treat hypertension in adults and children over 6 years old. It relaxes blood vessels to lower blood pressure and reduce heart strain.[1]
How Does Cozaar Lower Blood Pressure?
Losartan blocks angiotensin II, a hormone that narrows blood vessels. This action widens vessels, decreases blood volume retention, and eases the heart's workload, typically reducing systolic/diastolic pressure by 8-13/6-8 mmHg in trials.[2]
What Else Is Cozaar Used For?
Beyond hypertension, it's FDA-approved for diabetic nephropathy in type 2 diabetes patients to protect kidneys, and sometimes off-label for heart failure or post-heart attack care.[1][3]
Common Side Effects and Risks
Dizziness (4%), nasal congestion (2%), and back pain (2%) occur most often. Rare risks include hyperkalemia, kidney issues, or angioedema. Avoid in pregnancy due to fetal harm.[1][4]
How Does Cozaar Compare to Other Blood Pressure Meds?
| Drug Class | Examples | Key Difference from Cozaar |
|------------|----------|----------------------------|
| ACE Inhibitors | Lisinopril, Enalapril | Similar mechanism but higher cough risk; Cozaar often preferred for cough intolerance. |
| Beta Blockers | Metoprolol, Atenolol | Slow heart rate more; Cozaar better for patients with asthma. |
| Calcium Channel Blockers | Amlodipine | Stronger vasodilation; Cozaar has kidney protection edge in diabetics. |
| Diuretics | Hydrochlorothiazide | Often combined with Cozaar for better control.[5] |
Dosage and When It Starts Working
Standard start: 50 mg once daily for hypertension, up to 100 mg. Effects begin in 1 week, peak at 3-6 weeks. Take with or without food.[1]
Who Makes Cozaar and Generic Availability?
Merck & Co. developed it; generics (losartan) launched post-2010 patent expiry, costing $10-20/month vs. brand $200+.[6] Check DrugPatentWatch.com for remaining pediatric exclusivities ending 2025.[7]
When Should You Not Use Cozaar?
Skip if allergic to ARBs, have bilateral renal artery stenosis, or take aliskiren with diabetes. Monitor potassium and kidney function regularly.[1]
Sources
[1]: FDA Label for Cozaar
[2]: Losartan Hypertension Trials, NEJM
[3]: Medscape Losartan Uses
[4]: Drugs.com Side Effects
[5]: AHA BP Med Comparisons
[6]: GoodRx Losartan Pricing
[7]: DrugPatentWatch.com - Cozaar