Losartan (Cozaar) — Uses, Side Effects & Interactions

Losartan is a medication in the Angiotensin II Receptor Blocker (ARB) class, sold under the brand name Cozaar. It is one of the most commonly prescribed medications in the United States. Below you'll find key information about its uses, side effects, and important drug interactions.

What Is Losartan Used For?

Losartan is prescribed to treat the following conditions:

• Hypertension (High Blood Pressure)
• Heart Failure

Your doctor may also prescribe losartan for other conditions not listed here. Always take this medication exactly as prescribed and discuss any questions with your healthcare provider.

Common Side Effects

Most people taking losartan may experience some of the following side effects, which are generally mild and may improve as your body adjusts:

• dizziness
• nasal congestion
• back pain
• fatigue

Drug Interactions

Losartan can interact with other medications and substances, potentially changing how the drug works or increasing the risk of side effects. Important interactions include:

• potassium supplements
• NSAIDs
• lithium

Always inform your doctor and pharmacist about all medications, supplements, and herbal products you are taking. GProv's AI health navigator, Appi, can help you check for potential drug interactions.

Important Safety Information

This page provides general educational information about losartan and is not a substitute for professional medical advice. Do not start, stop, or change the dosage of any medication without consulting your healthcare provider. If you have questions about whether losartan is right for you, speak with your doctor or pharmacist.