What is Benicar: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Dec 30, 2020

Benicar overview

BRAND NAMES:

  • Benicar

Generic Names:

  • Olmesartan Medoxomil

Uses:

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

Therapeutic Classes:

  • Renal Protective Agent, Cardiovascular Agent

Forms:

  • Tablet

How it’s taken:

  • By mouth

What is Benicar used for?

Benicar is a medication used to treat high blood pressure. Benicar belongs to a group of drugs called angiotensin II receptor blockers (ARBs). Benicar is the trade name for the drug olmesartan. The drug was developed in 1995 by Sankyo. In the treatment of high blood pressure, Benicar use is fairly common.

What form(s) does Benicar come in

  • Tablet

What are common Benicar doses?

  • Tablet 5MG

  • Tablet 20MG

  • Tablet 40MG

Common Benicar prescriptions

  • Benicar
    20 tablets bottle

  • Benicar
    30 tablets bottle

  • Benicar
    90 tablets bottle

  • Benicar
    30 tablets disp pack

  • Benicar
    20mg tablet

  • Benicar
    40mg tablet

  • Benicar
    5mg tablet

How to take Benicar

  • Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.

  • Oral liquid: Shake it 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.

  • 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.

  • Oral liquid: Shake it well before each use. Measure the oral liquid medicine with a marked measuring spoon, oral syringe, or medicine cup.

  • 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.

  • Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.

What to do if you miss a dose of Benicar

Benicar contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to olmesartan, or if you are pregnant.

Benicar warnings

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • 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, heart failure, or low potassium or sodium in the blood.

  • 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.

Benicar interactions

  • Do not use this medicine together with aliskiren if you have diabetes or kidney problems.

  • Some medicines can affect how olmesartan works. Tell your doctor if you are using any of the following:LithiumACE inhibitor blood pressure medicineDiuretic (water pill)NSAID pain or arthritis medicine (including aspirin, celecoxib, diclofenac, ibuprofen, naproxen)

  • If you also use colesevelam, take it at least 4 hours after you take olmesartan.

  • Ask your doctor before you use medicines, supplements, or salt substitutes that contain potassium.

  • 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.

Benicar side effects

Serious Side Effects

  • Lightheadedness, dizziness, or fainting

  • Change in how much or how often you urinate, bloody or cloudy urine

  • Severe diarrhea with weight loss

  • Rapid weight gain, swelling in your hands, ankles, or feet

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing