Cozaar vs losartan?

Short answer: Cozaar and losartan are the same medicine. Cozaar is the brand name; losartan is the generic name.

Key points:
- Active ingredient: losartan potassium (ARB – angiotensin II receptor blocker).
- Brand vs generic: Cozaar = brand; losartan = generic. They have the same effect when dosed the same.
- How they work: block the AT1 receptor to lower blood pressure and protect kidneys in diabetes, among other effects.
- Dosing: typically started at 50 mg once daily for hypertension, may be increased to 100 mg daily (often split as 50 mg twice daily); max commonly 100 mg daily. Dosing can differ for other conditions (diabetic nephropathy, LVH, etc.)—follow your clinician’s instruction.
- Pharmacology note: losartan is a prodrug; its active metabolite EXP3174 is responsible for much of the effect and is more potent.
- Safety: similar side effects with both (dizziness, hyperkalemia, low blood pressure, kidney function changes, rare angioedema). Avoid in pregnancy.
- Cost/access: generics (losartan) are usually cheaper than Cozaar; brand protection/excipient differences are typically minor.

Related option:
- If you’re thinking about a combination pill, Hyzaar combines losartan with hydrochlorothiazide (a diuretic).

If you’re asking because you’re switching from Cozaar to losartan (or vice versa), it’s generally fine since they’re the same medication with the same dose. If you want, tell me your country/region and your current dose, and I can help compare costs or explain any label differences. Would you like more detail on dosing for a specific condition or any safety concerns?