The usual dose is one tablet daily. You can take olmesartan before or after meals.
Side-effects are usually mild. They include feeling dizzy and stomach upset.
Keep your regular appointments with your doctor to have your blood pressure measured.
Some painkillers interfere with olmesartan, so ask your pharmacist for advice before you buy any medicines.
|Type of medicine||Angiotensin-II receptor antagonist|
|Used for||High blood pressure|
Olmesartan is also available in combination with other medicines to treat high blood pressure as: Sevikar® (olmesartan with amlodipine), Olmetec Plus® (olmesartan with hydrochlorothiazide), Sevikar® HCT (olmesartan with amlodipine and hydrochlorothiazide)
Olmesartan is an angiotensin receptor blocker (also called an angiotensin-II receptor antagonist (AIIRA)). It is used to lower hypertension (high blood pressure). People with high blood pressure often do not feel unwell but, left untreated, high blood pressure can harm the heart and damage blood vessels.
Olmesartan works by blocking the effect of a chemical called angiotensin II which is made in your bloodstream. Angiotensin II causes your blood vessels to tighten. By preventing the action of angiotensin II, olmesartan helps your blood vessels to relax and this lowers your blood pressure.
Olmesartan is also available in combination with other medicines to reduce high blood pressure, such as amlodipine and hydrochlorothiazide.
Before taking olmesartan
Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking olmesartan it is important that your doctor or pharmacist knows:
- If you are pregnant, trying for a baby or breast-feeding.
- If you have gallbladder problems.
- If you have liver or kidney problems.
- If you know you have a blockage in the artery which supplies blood to your kidneys (this is called renal artery stenosis).
- If you have been told you have cardiomyopathy (heart muscle disease), or aortic stenosis (narrowing of the main blood vessel from your heart).
- If you are taking other medicines, including those available to buy without a prescription, herbal and complementary medicines.
- If you have ever had an allergic reaction to a medicine.
How to take olmesartan
- Before you start this treatment, read the manufacturer's printed information leaflet from inside the pack. The leaflet will give you more information about olmesartan and a full list of side-effects which are possible from taking it.
- Take olmesartan exactly as your doctor has told you to. It is usual to take one 10 mg tablet daily, although your doctor may increase your dose to 20 mg or 40 mg if needed. Your dose will be on the label of the pack of tablets to remind you.
- You can take olmesartan at a time of day you find easy to remember. For many people this is breakfast time. Try to take your doses at the same time each day, as this will help you to avoid missing any doses.
- You can take the tablets before or after meals.
- If you forget to take a dose, take it as soon as you remember. If you do not remember until the following day, skip the missed dose. Do not take two doses together to make up for a forgotten dose.
Getting the most from your treatment
- Try to keep your regular appointments with your doctor. This is so your progress can be monitored. Your doctor will want you to have some blood tests from time to time to check on your kidneys and how much potassium is in your blood.
- If you buy any medicines, check with a pharmacist that they are suitable to take with olmesartan. This is because some anti-inflammatory painkillers (such as aspirin and ibuprofen) may interfere with the way these tablets work, and also increase the risk of side-effects.
- It is very important that you follow any dietary and lifestyle advice that you may have been given by your doctor, such as eating a healthy diet, not smoking, and taking regular exercise.
- If you drink alcohol, ask your doctor for advice about taking olmesartan and alcohol. Drinking alcohol while you are on olmesartan may make you feel dizzy and may not be recommended for you.
- Do not use salt substitutes which contain potassium. This is because they increase the amount of potassium in your blood and this can cause problems.
- If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking olmesartan. This is because olmesartan taken with an anaesthetic may make your blood pressure drop too low.
- Treatment with olmesartan is usually long-term unless you experience an adverse effect. Continue to take the tablets unless you are advised otherwise.
Can olmesartan cause problems?
Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. These usually improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any of the following side-effects continue or become troublesome.
|Common olmesartan side-effects - these affect less than 1 in 10 people who take this medicine||What can I do if I experience this?|
|Feeling dizzy and light-headed when you stand up (due to low blood pressure)||Getting up and moving more slowly should help. If you begin to feel dizzy, sit for a few minutes before you stand up again|
|Feeling sick, abdominal pain, indigestion||Stick to simple foods - avoid rich or spicy meals|
|Diarrhoea||Drink plenty of water to replace lost fluids|
|Cough and flu-like symptoms, aches and pains, urine infections, feeling tired||If any of these become troublesome, discuss them with your doctor|
Important: if you get any swelling of your mouth or face, speak with your doctor or go to your local accident and emergency department straightaway. These are signs of an allergic reaction.
If you experience any other symptoms which you think may be due to this medicine, speak with your doctor or pharmacist.
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
Never take more than the prescribed dose. If you suspect that you or someone else might have taken an overdose of this medicine, go to the accident and emergency department of your local hospital at once. Take the container with you, even if it is empty.
This medicine is for you. Never give it to other people even if their condition appears to be the same as yours.
Do not keep out-of-date or unwanted medicines. Take them to your local pharmacy which will dispose of them for you.
If you have any questions about this medicine ask your pharmacist.
Further reading & references
- Manufacturer's PIL, Olmetec® film-coated tablets; Daiichi Sankyo UK Limited, The electronic Medicines Compendium. Dated September 2010.
- British National Formulary; 64th Edition (Sep 2012) British Medical Association and Royal Pharmaceutical Society of Great Britain, London (links to current BNF)
|Original Author: Helen Allen||Current Version: Helen Allen||Peer Reviewer: Dr Helen Huins|
|Last Checked: 10/12/2012||Document ID: 3862 Version: 25||© EMIS|
Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. EMIS has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.