Before taking Losartan 100mg, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using Losartan 100mg, tell your doctor or pharmacist your medical history, especially of: liver disease, severe loss of body water and minerals (volume depletion, dehydration).
Losartan 100mg may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
Losartan 100mg may increase your potassium levels. Before using potassium supplements or salt substitutes that contain potassium, consult your doctor or pharmacist.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Losartan 100mg is not recommended for use during pregnancy due to the risk for harm to an unborn baby. Consult your doctor for more details. ()
It is unknown if Losartan 100mg passes into breast milk. Consult your doctor before breast-feeding.
Store tablets at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Store the suspension in the refrigerator between 36-46 degrees F (2-8 degrees C). Do not freeze. Discard any unused suspension after 4 weeks.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Losartan 100mg 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 100mg belongs to a class of drugs called angiotensin receptor blockers. 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 100mg and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take Losartan 100mg 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 Losartan 100mg, 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 Losartan 100mg regularly to get the most benefit from it. To help you remember, take it at the same time each day. It is important to continue taking Losartan 100mg 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 if it worsens (for example, your blood pressure readings increase).
Dizziness or lightheadedness may occur as your body adjusts to the medication. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
Remember that your doctor has prescribed Losartan 100mg because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using Losartan 100mg 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), unusual change in the amount of urine.
A very serious allergic reaction to Losartan 100mg 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, 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 FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Click here to view a more detailed list of Losartan side effects.
If you miss a dose of Losartan 100mg, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
See also How to Use and Precautions sections.
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 the products you use (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 Losartan 100mg include: aliskiren, lithium.
Check the labels on all your medicines (such as cough-and-cold products, diet aids, or NSAIDs such as ibuprofen, naproxen) because they may contain ingredients that could increase your blood pressure or worsen your heart failure. Ask your pharmacist for more details.
Losartan 100mg can cause serious (possibly fatal) harm to an unborn baby if used during pregnancy. Therefore, it is important to prevent pregnancy while taking Losartan 100mg. Consult your doctor for more details and to discuss the use of reliable forms of birth control while taking Losartan 100mg. If you are planning pregnancy, become pregnant, or think you may be pregnant, contact your doctor immediately.