How does olmesartan work?
Olmesartan blocks the effects of angiotensin II, a hormone that narrows blood vessels. This helps relax and widen the blood vessels, reducing blood pressure and improving circulation.
What is olmesartan used to treat?
Olmesartan is commonly prescribed for:
- High blood pressure (hypertension) (to lower the risk of strokes and heart attacks)
- Protecting kidney function in people with diabetes
- Reducing the risk of heart failure complications
Who can take olmesartan?
Olmesartan is suitable for most adults and some children over 6 years old, as prescribed by a doctor.
Who might not be able to take olmesartan?
Olmesartan may not be suitable if you:
- Have severe kidney or liver disease
- Have low blood pressure (hypotension)
- Are pregnant or planning to conceive
- Are taking other medications that affect blood pressure or potassium levels
Can I take olmesartan if I’m pregnant or breastfeeding?
Olmesartan isn’t recommended during pregnancy or breastfeeding, as it may harm the baby. Speak to your doctor about safer alternatives.
What if I miss a dose?
If you forget a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed one—do not take two doses at once.
How effective is olmesartan?
Olmesartan is highly effective at lowering blood pressure and protecting kidney function when taken consistently.
What should I do if I take too much?
Taking too much olmesartan can cause dangerously low blood pressure, dizziness, or fainting. If you think you’ve taken too much, seek emergency medical help immediately.
What dose of olmesartan is usually taken?
- For high blood pressure: 10mg to 40mg once daily
- For kidney protection: Dose as determined by your doctor
Your doctor will determine the correct dose based on your condition.
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What are the side effects of olmesartan?
Common side effects include:
- Dizziness or lightheadedness
- Fatigue
- Increased potassium levels (which may cause muscle weakness or irregular heartbeat)
- Nausea
Serious side effects, such as severe dizziness, kidney problems, or allergic reactions, require urgent medical attention.
How should I take olmesartan?
Olmesartan is taken as tablets, usually once daily, with or without food.
When should olmesartan be taken?
Olmesartan should be taken at the same time each day, as prescribed by your doctor.
What are the brand names for olmesartan?
Olmesartan is available as a generic medicine, but some branded versions include:
- Olmetec
- Benicar (outside the UK)
Final thoughts
Olmesartan is an effective medication for high blood pressure and kidney protection, but it should be taken exactly as prescribed. Regular monitoring of blood pressure and kidney function may be needed. If side effects occur, speak to your doctor or pharmacist.
