Ingredient

Losartan Potassium

Losartan potassium is an antihypertensive agent used to treat high blood pressure.

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378
Single ingredient
146
Combination
232
Prescription medication
378

MFDS ingredient code M249673

What does it do?

Losartan potassium belongs to the class of angiotensin II receptor blockers and is used in medications to lower blood pressure. It is primarily prescribed for the purpose of controlling blood pressure in patients with hypertension. It may also help prevent cardiovascular diseases.

Losartan potassium works by blocking the binding of a substance called angiotensin II, which constricts blood vessels, to the vascular receptors, causing the blood vessels to dilate. This reduces vascular resistance and lowers blood pressure. Additionally, it reduces the burden on the heart and kidneys.

Commonly used for

Approved uses differ by product. Check each product's information for its actual use.

Good to know

Losartan potassium has superior efficacy compared to other angiotensin II receptor blockers of the same class and has relatively fewer side effects. It also has potassium-sparing effects, so caution is needed in managing blood potassium levels.

Medicines containing this ingredient

Even with the same ingredient, strength, dosage form and how it is taken can differ.

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378 total

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Even with the same ingredient, dosage and approved uses can differ by strength, dosage form and combined ingredients. Check each product's information before taking it.

Combined ingredients

Ingredients used together with this ingredient in combination products.

Questions about this ingredient

  • QIf I am taking blood pressure medication, can I also take a supplement that contains potassium?

    According to the ingredient description, losartan potassium has a potassium-sparing effect, necessitating caution in managing serum potassium levels. Please verify with the prescribing doctor or pharmacist before adding any supplements or other medications that contain potassium.

    Answers 1 · 2026.09.14

  • QHow does losartan lower blood pressure?

    Losartan potassium prevents angiotensin II from binding to its receptor, causing blood vessels to dilate. As a result, vascular resistance decreases, lowering blood pressure and reducing the burden on the heart and kidneys.

    Answers 1 · 2026.09.14

For anything that needs medical judgment, consult a doctor or pharmacist.

SourceKorea Ministry of Food and Drug Safety (Drug Safety Korea)

This drug information is based on data provided by the Korea Ministry of Food and Drug Safety.
Consult a doctor or pharmacist for accurate dosage, administration, and usage instructions.