Olmesartan (By mouth)

Introduction

Olmesartan Medoxomil (ol-me-SAR-tan me-DOX-oh-mil)

Treats high blood pressure. This medicine is an angiotensin receptor blocker (ARB).

Brand Name(s)

Benicar

When This Medicine Should Not Be Used

How to Use This Medicine

Tablet

  • Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.
  • Shake the oral liquid well before each use. Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup.
  • 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. Store the oral liquid in the refrigerator. Throw away any unused medicine after 4 weeks.

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.
  • Some medicines can affect how olmesartan works. Tell your doctor if you are using any of the following:
    • Lithium
    • An ACE inhibitor blood pressure medicine
    • An NSAID pain or arthritis medicine, such as aspirin, diclofenac, ibuprofen, naproxen
    • A diuretic (water pill)
  • If you also use colesevelam, take it at least 4 hours after you take olmesartan.

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 or heart failure.
  • This medicine may cause severe chronic diarrhea with weight loss. This could occur months to years after you start taking this medicine.
  • This medicine could lower your blood pressure too much, especially when you first use it or if you are dehydrated. Stand or sit up slowly if you feel lightheaded or dizzy.
  • Drink plenty of fluids if you exercise, sweat more than usual, or have diarrhea or vomiting while you are using this medicine.
  • 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, bloody or cloudy urine
  • Lightheadedness, dizziness, or fainting
  • Rapid weight gain, swelling in your hands, ankles, or feet
  • Severe diarrhea with weight loss

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

Version Info

  • Last reviewed on 7/4/2015

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (www.hon.ch)

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2013 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.