Losartan is an angiotensin II receptor blocker (ARB). Doctors prescribe it to lower blood pressure and to protect the kidneys in people with diabetes.
What Is Losartan Used For?
- High blood pressure
- Protecting the kidneys in people with type 2 diabetes
- Lowering the risk of stroke in people with high blood pressure and an enlarged heart
- Heart failure, when other medicines do not suit
How Does Losartan Work?
Losartan blocks the effect of angiotensin II, a substance that tightens blood vessels. Your vessels relax, and your blood pressure falls.
General Dosage Information
This is general information only. Your doctor sets the right dose for you, so follow your prescription and the label.
- Adults usually start with 50 mg once a day. Doctors can adjust it between 25 mg and 100 mg.
- Take it at the same time each day, with or without food.
- Do not use it during pregnancy.
Side Effects of Losartan
Common Side Effects
- Dizziness
- Tiredness
- Stuffy nose
- Back or leg pain
Serious Side Effects
Call your doctor or get emergency help if you notice:
- Swelling of the face, lips, or throat
- High potassium: muscle weakness or an irregular heartbeat
- Very little urine or sudden swelling in the legs
- Fainting
Who Should Be Cautious?
- Pregnant women, who must not take it
- People with kidney artery narrowing, kidney disease, or liver disease
- People who are dehydrated or have vomiting or diarrhea
- Older adults
Drug Interactions
Tell your doctor and pharmacist about every medicine and supplement you take. Examples of important interactions include:
- Potassium supplements and spironolactone: they can raise potassium too high.
- NSAIDs such as ibuprofen: they can weaken the effect and harm the kidneys.
- Lithium: losartan can raise its level.
- ACE inhibitors: doctors rarely combine them with losartan.
Storage and Precautions
- Store it at room temperature, away from heat, light, and moisture.
- Keep it out of the reach of children.
Frequently Asked Questions
Can losartan cause a cough?
Rarely. It causes a cough less often than ACE inhibitors.
What if I get pregnant?
Tell your doctor right away. Losartan can harm an unborn baby.
When will it work?
Blood pressure usually drops within a few weeks.
Disclaimer: This article is for information only. It is not medical advice. Please talk to your doctor about your own health.