Losartan Potassium

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Losartan Potassium

Losartan Potassium drug image

Brand Cozaar     

Form Oral Tablet

     Drug Type Antihypertensives, Angiotensin Receptor Antagonist

 

Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes.

 

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Drug Information

Losartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes. It is also used to lower the risk of strokes in patients with high blood pressure and an enlarged heart. Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Losartan belongs to a class of drugs called angiotensin receptor blockers (ARBs). It works by relaxing blood vessels so that blood can flow more easily.

Read the Patient Information Leaflet if available from your pharmacist before you start taking losartan and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth as directed by your doctor, usually once daily, with or without food. The dosage is based on your medical condition and response to treatment. If you are using the liquid form of this medication, shake the bottle well before each dose. Carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day. Keep taking this medication even if you feel well. Most people with high blood pressure do not feel sick.

Tell your doctor if your condition does not improve or worsen (for example, your blood pressure readings increase).

Dizziness or lightheadedness may occur as your body adjusts to the medication. Tell your doctor or pharmacist promptly if any of these effects last or get worse. To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.

Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if any of these unlikely but serious side effects occur: fainting, symptoms of a high potassium blood level (such as muscle weakness, slow/irregular heartbeat). Although losartan may be used to prevent kidney problems or treat people who have kidney problems, it may also rarely cause serious kidney problems or worsen them. Your doctor will check your kidney function while you are taking losartan. Tell your doctor right away if you have any signs of kidney problems, such as a change in the amount of urine.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, or trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.

This drug can cause serious (possibly fatal) harm to an unborn baby if used during pregnancy. It is important to prevent pregnancy while taking this medication. Consult your doctor for more details and discuss using reliable forms of birth control while taking this medication. If you are planning pregnancy, become pregnant, or think you may be pregnant, contact your doctor right away.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all your products (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Some products that may interact with this drug include aliskiren, lithium, and drugs that may increase the level of potassium in the blood (such as ACE inhibitors including benazepril/lisinopril, birth control pills containing drospirenone). Some products have ingredients that could raise your blood pressure or worsen your heart failure. Tell your pharmacist what products you are using, and ask how to use them safely (especially cough-and-cold products, diet aids, or NSAIDs such as ibuprofen/naproxen).

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The information provided on this page is updated periodically. Please use our Drug Search Tool for the latest information and updates about this drug. The information on this site is not intended to take the place of your doctor or other healthcare professionals. It is a resource to help you make the best decisions and get the most from the medical services available to you. A licensed physician should be consulted to diagnose and treat all medical conditions.