Happi 20

Tablet · Zydus
PRESCRIPTION MEDICINE

Happi 20 is a tablet made by Zydus that contains Rabeprazole 20 mg. Rabeprazole is a acid reducer (proton pump inhibitor): reduces stomach acid to treat acidity, reflux and ulcers.

Ingredient (salt)Amount
Rabeprazole20 mg

What it is used for

Reduces stomach acid to treat acidity, reflux and ulcers.

How it works

A proton pump inhibitor (PPI) that blocks stomach acid production and starts working slightly faster than some others.

How to take it

Take once a day, 30 to 60 minutes before breakfast, swallowed whole (do not crush or chew). Short courses of 2 to 8 weeks are usual; long-term use should be reviewed by a doctor.

Common side effects

  • Headache
  • Diarrhoea
  • Stomach pain
  • Nausea
  • Wind
  • Constipation

Get medical help straight away if

  • Watery diarrhoea that does not stop (possible C. difficile infection)
  • Difficulty swallowing, weight loss or black stools
  • Muscle cramps or spasms (low magnesium with long use)

Be careful

Take before food. Long-term use should be reviewed by a doctor.

Other medicines and interactions

Lowers absorption of itraconazole, ketoconazole and some HIV medicines. Can affect digoxin and methotrexate levels.

Pregnancy and breastfeeding

Generally considered acceptable in pregnancy and breastfeeding when needed; ask your doctor.

Same composition, other brands (10)

Razo 20Veloz 20Rablet 20Rabicip 20Rabekind 20Rabesec 20Rabonik 20Rabeloc 20Rabium-20Rekool 20

Ask your doctor or pharmacist before switching brands.

Common questions

What is Happi 20?

Happi 20 is a tablet by Zydus containing Rabeprazole 20 mg.

What is Happi 20 used for?

Reduces stomach acid to treat acidity, reflux and ulcers.

How should I take Happi 20?

Take once a day, 30 to 60 minutes before breakfast, swallowed whole (do not crush or chew). Short courses of 2 to 8 weeks are usual; long-term use should be reviewed by a doctor. Always follow the dose your doctor or the pack gives.

What are the side effects of Happi 20?

Common side effects include: Headache, diarrhoea, stomach pain, nausea, wind, constipation. Get medical help straight away for: Watery diarrhoea that does not stop (possible C. difficile infection), difficulty swallowing, weight loss or black stools, muscle cramps or spasms (low magnesium with long use).

Does Happi 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 Happi 20 in pregnancy or while breastfeeding?

Generally considered acceptable in pregnancy and breastfeeding when needed; ask your doctor.

What are the substitutes for Happi 20?

Brands with the same composition: Razo 20, Veloz 20, Rablet 20, Rabicip 20, Rabekind 20, Rabesec 20, Rabonik 20, Rabeloc 20, Rabium-20, Rekool 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.