Olmark-20

Tablet · Intas Pharma
PRESCRIPTION MEDICINE

Olmark-20 is a tablet made by Intas Pharma that contains Olmesartan 20 mg. Olmesartan is a blood pressure medicine (arb): lowers blood pressure.

Ingredient (salt)Amount
Olmesartan20 mg

What it is used for

Lowers blood pressure.

How it works

An angiotensin receptor blocker (ARB) for high blood pressure.

How to take it

Usually 20 to 40 mg once a day.

Common side effects

  • Dizziness, especially when standing up
  • Tiredness
  • Raised potassium

Get medical help straight away if

  • Swelling of the face, lips or tongue
  • Fainting
  • Much less urine
  • Muscle weakness or irregular heartbeat (high potassium)
  • Severe long-lasting diarrhoea with weight loss (rare gut reaction)

Be careful

Not in pregnancy; can rarely cause severe diarrhoea.

Other medicines and interactions

Potassium supplements, salt substitutes, spironolactone and NSAIDs raise potassium and kidney risk. Do not combine with an ACE inhibitor or aliskiren. Raises lithium levels.

Pregnancy and breastfeeding

Must not be used in pregnancy (it harms the baby's kidneys); switch before trying to conceive. Ask your doctor about breastfeeding; other medicines may be preferred.

Same composition, other brands (14)

Olmezest 20Olsar 20Olmighty 20Olmetime-20Olmin 20Olmat-20Olmetrack 20Olmesar 20Olmax 20Olkem-20Pinom 20Winbp 20Olmy 20Olmetor 20

Ask your doctor or pharmacist before switching brands.

Same ingredients, different strength or form

Olmezest 40Olsar 40

Common questions

What is Olmark-20?

Olmark-20 is a tablet by Intas Pharma containing Olmesartan 20 mg.

What is Olmark-20 used for?

Lowers blood pressure.

How should I take Olmark-20?

Usually 20 to 40 mg once a day. Always follow the dose your doctor or the pack gives.

What are the side effects of Olmark-20?

Common side effects include: Dizziness, especially when standing up, tiredness, raised potassium. Get medical help straight away for: Swelling of the face, lips or tongue, fainting, much less urine, muscle weakness or irregular heartbeat (high potassium), severe long-lasting diarrhoea with weight loss (rare gut reaction).

Does Olmark-20 need a prescription?

Yes. In India it is a prescription (Schedule H) medicine, so a pharmacist should sell it only with a doctor's prescription.

Can I take Olmark-20 in pregnancy or while breastfeeding?

Must not be used in pregnancy (it harms the baby's kidneys); switch before trying to conceive. Ask your doctor about breastfeeding; other medicines may be preferred.

What are the substitutes for Olmark-20?

Brands with the same composition: Olmezest 20, Olsar 20, Olmighty 20, Olmetime-20, Olmin 20, Olmat-20, Olmetrack 20, Olmesar 20, Olmax 20, Olkem-20, Pinom 20, Winbp 20. Ask your doctor or pharmacist before switching.

Sources and further reading

NHS (UK National Health Service) and MedlinePlus (US National Library of Medicine) are free, reviewed medicine guides. Brand names and doses there may differ from India.

Composition checked against pack details from large Indian online pharmacies. Last reviewed 31 October 2026. Written by Satya Babu.

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For information only, not medical advice. This page is a plain-language summary written from standard prescribing information and the public guides linked below. Brands sometimes change their formula, so always check the composition printed on the pack. Doses here are typical adult doses; yours may differ. Do not start, stop or change a medicine without your doctor or pharmacist, and keep all medicines away from children. In an emergency, call 112 (India) or your local emergency number.