Olmesartan

About olmesartan

Olmesartan is used to treat hypertension (high blood pressure).

It works by preventing the action of a hormone called angiotensin-II. Angiotensin-II causes blood vessels to narrow and leads to production of another hormone called aldosterone which increases the amount of fluid in the blood. By preventing the action of angiotensin-II, olmesartan widens blood vessels and reduces fluid in the blood, lowering the blood pressure.

Olmesartan may also be used in combination with other medicines used to reduce blood pressure, such as amlodipine or hydrochlorothiazide.

Before taking olmesartan

Before taking olmesartan make sure your doctor or pharmacist knows:

• If you have gall-bladder, liver or kidney problems.
• If you suffer from renal artery stenosis (a narrowing or blockage of the artery supplying the kidney).
• If you have problems with your heart valves or heart muscle.
• If you are pregnant, trying for a baby or breast-feeding.
• If you are taking other medicines, including those available to buy without a prescription, herbal or complementary medicines.
• If you have ever had an allergic reaction to this or any other medicine.

How to take olmesartan

• Before beginning treatment, read the manufacturer's printed information leaflet.
• Take olmesartan exactly as directed by your doctor. It is usually taken once daily.
• Try to take olmesartan at the same time each day to avoid missing any doses.
• If you forget to take a dose, take one as soon as you remember. Do not take two doses at the same time to make up for a missed dose.

Getting the most from your treatment

• If you are having any treatment like an operation or dental treatment, tell the person carrying out the treatment which medicines you are taking.
• Keep your regular doctor's appointment so your progress can be monitored. You will have regular blood tests to check your kidney function. Your doctor will also measure your blood pressure.
• Do not stop taking this medicine without speaking to your doctor first.
• If you buy any medicines, check with a pharmacist that they are safe to take with your other medicines.

Can olmesartan cause problems?

Along with their useful effects all medicines can cause unwanted side-effects. These usually improve as your body adjusts to the new medicine. Speak with your doctor or pharmacist if any of the following side-effects continue or become troublesome.

How to store olmesartan

• Keep all medicines out of the reach and sight of children.
• Store in a cool, dry place, away from direct heat and light.

Important information about all medicines