⚕️ Full Prescribing Information
For complete safety information, warnings, and dosage guidelines:
View FDA Label (PDF) →📋 Overview
Losartan is an angiotensin II receptor blocker (ARB) used to treat high blood pressure and protect kidney function in people with diabetes. It is generally well-tolerated with fewer side effects than ACE inhibitors.
How It Works
Losartan blocks angiotensin II, a hormone that narrows blood vessels. This relaxes blood vessels, lowering blood pressure and reducing strain on the heart and kidneys.
✓ FDA Approved Uses
- High blood pressure (hypertension)
- Protect kidneys in type 2 diabetes
- Reduce stroke risk in patients with hypertension and left ventricular hypertrophy
🧪 Required Lab Monitoring
Your healthcare provider will order these tests to monitor your treatment:
Kidney Function Test
Baseline and 2 weeks after starting, then periodically
Baseline and annually
Need to book these tests?
Order Tests Online →⚡ Common Side Effects
Contact your doctor if these persist or worsen:
- Dizziness
- Upper respiratory infection
- Back pain
- Fatigue
- Nasal congestion
🚨 Serious Side Effects
Seek immediate medical attention if you experience:
- High potassium levels
- Kidney problems
- Severe allergic reactions
- Low blood pressure
- Fetal toxicity (do not use in pregnancy)
⚠️ Do Not Use If
- Pregnancy
- History of angioedema with ACE inhibitors
- Severe kidney disease with diabetes
- Bilateral renal artery stenosis
📢 Important Warnings
- Stop immediately if pregnancy occurs
- Monitor potassium and kidney function
- May cause dizziness - rise slowly from sitting
- Avoid salt substitutes containing potassium