Seloken XL 50

Tablet · AstraZeneca
PRESCRIPTION MEDICINE

Seloken XL 50 is a tablet made by AstraZeneca that contains Metoprolol 50 mg (slow release). Metoprolol is a beta blocker: lowers blood pressure and heart rate; used in angina and heart failure.

Ingredient (salt)Amount
Metoprolol50 mg (slow release)

What it is used for

Lowers blood pressure and heart rate; used in angina and heart failure.

How it works

A beta blocker for high blood pressure, angina, heart failure, irregular heartbeat and migraine prevention.

How to take it

Usually 25 to 200 mg a day; slow-release (XL) tablets once a day, swallowed whole or halved if scored.

Common side effects

  • Tiredness
  • Cold hands and feet
  • Slow pulse
  • Dizziness
  • Vivid dreams

Get medical help straight away if

  • Breathlessness or wheeze
  • Very slow pulse or fainting
  • Swollen ankles or rapid weight gain

Be careful

Do not stop suddenly. Can cause tiredness or dizziness.

Other medicines and interactions

Do not stop suddenly (it can trigger chest pain or a heart attack); taper as advised. Verapamil and diltiazem together can slow the heart dangerously. Can hide low sugar warning signs in diabetes.

Pregnancy and breastfeeding

Some beta blockers (such as labetalol) are used in pregnancy; ask your doctor whether yours is suitable. Babies may need watching for slow heart rate or low sugar after birth.

Same composition, other brands (2)

Met XL 50Prolomet XL 50

Ask your doctor or pharmacist before switching brands.

Same ingredients, different strength or form

Met XL 25Prolomet XL 25Seloken XL 25Met XL 12.5Moreprol 25Tamepro 25Metozaar XL-25Metomac 25XM-Beta 25

Common questions

What is Seloken XL 50?

Seloken XL 50 is a tablet by AstraZeneca containing Metoprolol 50 mg (slow release).

What is Seloken XL 50 used for?

Lowers blood pressure and heart rate; used in angina and heart failure.

How should I take Seloken XL 50?

Usually 25 to 200 mg a day; slow-release (XL) tablets once a day, swallowed whole or halved if scored. Always follow the dose your doctor or the pack gives.

What are the side effects of Seloken XL 50?

Common side effects include: Tiredness, cold hands and feet, slow pulse, dizziness, vivid dreams. Get medical help straight away for: Breathlessness or wheeze, very slow pulse or fainting, swollen ankles or rapid weight gain.

Does Seloken XL 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 Seloken XL 50 in pregnancy or while breastfeeding?

Some beta blockers (such as labetalol) are used in pregnancy; ask your doctor whether yours is suitable. Babies may need watching for slow heart rate or low sugar after birth.

What are the substitutes for Seloken XL 50?

Brands with the same composition: Met XL 50, Prolomet XL 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.