Olmesartan is used alone or in combination with other medications to treat high blood pressure. Olmesartan is in a class of medications called angiotensin II receptor antagonists. It works by blocking the action of certain chemicals that tighten the blood vessels, so blood flows more smoothly. Olmesartan controls high blood pressure but does not cure it. It may take up to 2 weeks before you feel the full benefit of olmesartan.

Directions

Take Olmesartan by mouth, usually once daily or as directed by your doctor. You may take this drug with or without food. Use this medication regularly in order to get the most benefit from it. To help you remember, use it at the same time each day.

Do not take potassium supplements or salt substitutes containing potassium without talking to your doctor or pharmacist first. This medicine can raise your potassium levels, which can rarely cause serious side effects such as muscle weakness or very slow heartbeat. Tell your doctor immediately if any of these effects occur.

The dosage is based on your medical condition and response to therapy. For the treatment of high blood pressure, it may take 2 to 4 weeks before you get the full benefit of this drug.

It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick.

Inform your doctor if your condition worsens (e.g., your routine blood pressure readings increase).

Side Effects

Olmesartan may cause side effects. Tell your doctor if you experience severe dizziness and it does not go away.

Some side effects can be serious. The following symptoms are uncommon, but if you experience any of them, call your doctor immediately:

• swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
• hoarseness
• difficulty swallowing or breathing

Olmesartan may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

Overdose Information

In case of overdose, call your local poison control center. If the victim has collapsed or is not breathing, call local emergency services.

Symptoms of overdose may include:

Missed Dose

If you miss a dose, 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.

Storage

Store at room temperature between 68 - 77°F (20 - 25°C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.

More Information

Lifestyle changes such as stress reduction programs, exercise and dietary changes may increase the effectiveness of this medicine. Talk to your doctor or pharmacist about lifestyle changes that might benefit you.