Omnitan 50

Tablet · Macleods Pharma
PRESCRIPTION MEDICINE

Omnitan 50 is a tablet made by Macleods Pharma that contains Losartan 50 mg. Losartan is a blood pressure medicine (arb): lowers blood pressure and protects the kidneys in diabetes.

Ingredient (salt)Amount
Losartan50 mg

What it is used for

Lowers blood pressure and protects the kidneys in diabetes.

How it works

An angiotensin receptor blocker (ARB) for high blood pressure, heart failure and diabetic kidney disease. It also lowers uric acid slightly.

How to take it

Usually 25 to 100 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)

Be careful

Not in pregnancy. Can raise potassium.

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)

Losar 50Repace 50Losacar 50Cozaar 50LTK-50Lostat 50Cosart-50Losium-50Angizaar-50Losartas-50Losanorm-50Tozaar 50Covance 50Revas 50

Ask your doctor or pharmacist before switching brands.

Same ingredients, different strength or form

Losar 25Repace 25Losacar 25

Common questions

What is Omnitan 50?

Omnitan 50 is a tablet by Macleods Pharma containing Losartan 50 mg.

What is Omnitan 50 used for?

Lowers blood pressure and protects the kidneys in diabetes.

How should I take Omnitan 50?

Usually 25 to 100 mg once a day. Always follow the dose your doctor or the pack gives.

What are the side effects of Omnitan 50?

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).

Does Omnitan 50 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 Omnitan 50 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 Omnitan 50?

Brands with the same composition: Losar 50, Repace 50, Losacar 50, Cozaar 50, LTK-50, Lostat 50, Cosart-50, Losium-50, Angizaar-50, Losartas-50, Losanorm-50, Tozaar 50. 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.