Losartan belongs to a class of medications known as angiotensin receptor blockers (ARBs). It is widely prescribed for high blood pressure and offers additional benefits for kidney protection, particularly in people with diabetes-related kidney disease.
What Is Losartan Used For?
- High blood pressure management
- Protecting kidney function in people with type 2 diabetes and diabetic nephropathy
- Reducing risk of stroke in patients with high blood pressure and heart enlargement
- Sometimes used in heart failure management as an alternative to ACE inhibitors
How Does Losartan Work?
Losartan blocks the action of angiotensin II, a hormone that causes blood vessels to narrow. By blocking its receptor, blood vessels relax and widen, lowering blood pressure and reducing strain on the heart and kidneys.
General Dosage Information
- Common starting doses range from 25mg to 50mg once daily, with adjustments made based on blood pressure response.
- Maximum doses can go up to 100mg daily in some cases.
- It can be taken with or without food.
- Kidney function and potassium levels are often monitored periodically during treatment.
Side Effects of Losartan
- Dizziness
- Fatigue
- Elevated potassium levels
- Mild changes in kidney function markers
- Low blood pressure symptoms such as lightheadedness
Who Should Be Cautious?
- Pregnant women, as ARBs can cause harm to the developing fetus and are generally avoided during pregnancy
- People with significant kidney artery narrowing
- Those with high potassium levels or taking potassium-sparing medications
- People with severe dehydration or low blood volume
Drug Interactions
- Potassium supplements or potassium-sparing diuretics, increasing risk of high potassium levels
- NSAIDs, which can reduce the blood pressure-lowering effect and affect kidney function
- Lithium, where losartan can increase blood lithium levels
- Other blood pressure medications, enhancing overall blood pressure-lowering effect
Storage and Precautions
Store at room temperature away from moisture. Regular blood tests to check kidney function and potassium levels are typically recommended, especially during the initial phase of treatment or after dose changes.
Frequently Asked Questions
Is losartan the same as an ACE inhibitor? No, though both lower blood pressure through the renin-angiotensin system, ARBs like losartan work at a different point in the pathway and typically cause less cough than ACE inhibitors.
Can losartan protect the kidneys? Yes, it is often specifically used in diabetic patients to help slow the progression of kidney disease.
Is it safe to take losartan during pregnancy? No, it should be avoided during pregnancy due to potential harm to the developing baby; alternative medications are used instead.
Disclaimer
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Please consult your doctor or pharmacist before using Losartan or any other medication, especially if you have underlying health conditions or are taking other medicines.