Althrocin 500

Tablet · Alembic
PRESCRIPTION MEDICINE

Althrocin 500 is a tablet made by Alembic that contains Erythromycin 500 mg. Erythromycin is a antibiotic (macrolide): treats chest, throat, skin and some other bacterial infections, often in people allergic to penicillin.

Ingredient (salt)Amount
Erythromycin500 mg

What it is used for

Treats chest, throat, skin and some other bacterial infections, often in people allergic to penicillin.

How it works

A macrolide antibiotic for chest, skin and throat infections in people allergic to penicillin; also as acne gel.

How to take it

Usually 250 to 500 mg four times a day; some forms before food. Finish the course.

Common side effects

  • Nausea
  • Stomach cramps
  • Diarrhoea

Get medical help straight away if

  • Fainting or palpitations
  • Yellow skin
  • Severe diarrhoea

Be careful

Can upset the stomach; many drug interactions.

Other medicines and interactions

Raises levels of statins (simvastatin, atorvastatin), warfarin, theophylline, carbamazepine, colchicine and others. Heart rhythm risk with other QT-prolonging medicines.

Pregnancy and breastfeeding

Considered acceptable in pregnancy and breastfeeding.

Common questions

What is Althrocin 500?

Althrocin 500 is a tablet by Alembic containing Erythromycin 500 mg.

What is Althrocin 500 used for?

Treats chest, throat, skin and some other bacterial infections, often in people allergic to penicillin.

How should I take Althrocin 500?

Usually 250 to 500 mg four times a day; some forms before food. Finish the course. Always follow the dose your doctor or the pack gives.

What are the side effects of Althrocin 500?

Common side effects include: Nausea, stomach cramps, diarrhoea. Get medical help straight away for: Fainting or palpitations, yellow skin, severe diarrhoea.

Does Althrocin 500 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 Althrocin 500 in pregnancy or while breastfeeding?

Considered acceptable in pregnancy and breastfeeding.

What are the substitutes for Althrocin 500?

We have no other brand with exactly the same composition and strength in our list yet. Ask your pharmacist for an equivalent.

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.