Irbesartan (By mouth)
Treats high blood pressure. Also treats diabetic nephropathy. This medicine is an angiotensin receptor blocker (ARB).
When This Medicine Should Not Be Used
How to Use This Medicine
- Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.
- Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
- Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
- Do not use this medicine together with aliskiren if you have diabetes.
- Some medicines can affect how irbesartan works. Tell your doctor if you are using the following:
- A diuretic (water pill, such as amiloride, spironolactone, triamterene)
- An NSAID pain or arthritis medicine (such as aspirin, celecoxib, diclofenac, ibuprofen, naproxen)
- Ask your doctor before you use any medicine, supplement, or salt substitute that contains potassium.
Warnings While Using This Medicine
- It is not safe to take this medicine during pregnancy. It could harm an unborn baby. Tell your doctor right away if you become pregnant.
- Tell your doctor if you are breastfeeding, or if you have kidney disease, liver disease, or heart failure.
- This medicine may cause kidney problems.
- This medicine could lower your blood pressure too much and cause you to feel dizzy or lightheaded. This is more likely to happen when you first use the medicine or if you become dehydrated. Stand or sit up slowly if you are dizzy.
- Do not stop using the medicine without asking your doctor, even if you feel well. This medicine will not cure your high blood pressure, but it will help keep it in the normal range. You may have to take blood pressure medicine for the rest of your life.
- Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
Possible Side Effects While Using This Medicine
Call your doctor right away if you notice any of these side effects:
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Change in how much or how often you urinate
- Confusion, weakness, uneven heartbeat, trouble breathing, numbness or tingling in your hands, feet, or lips
- Lightheadedness, dizziness, fainting
- Rapid weight gain, swelling in your hands, ankles, or feet
If you notice other side effects that you think are caused by this medicine, tell your doctor
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088
- Last reviewed on 4/8/2016
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