Lactic acid bacillus

Probiotic
ALSO SOLD WITHOUT PRESCRIPTION

Lactic acid bacillus is a probiotic found in 2 medicines sold in India, such as Sporlac, Doxt-SL. Below: what it is for, how it works, how to take it, side effects, interactions and pregnancy advice.

Also called: lactobacillus, lactic acid bacillus

What it is used for

Restores helpful gut bacteria, for example during diarrhoea or after antibiotics.

How it works

A lactic acid bacillus probiotic that may help restore gut bacteria, for example during or after antibiotics.

How to take it

Take as directed, usually once or twice a day; take it 2 to 3 hours apart from antibiotics.

Common side effects

  • Wind
  • Bloating

Get medical help straight away if

Fever or feeling very unwell, especially if your immune system is weak

Be careful

Generally safe.

Other medicines and interactions

Antibiotics can kill it; separate the doses.

Pregnancy and breastfeeding

Considered safe in pregnancy and breastfeeding.

Brands of Lactic acid bacillus (1)

Sporlac

Combination medicines that contain Lactic acid bacillus (1)

Doxt-SL

Common questions

What is Lactic acid bacillus used for?

Restores helpful gut bacteria, for example during diarrhoea or after antibiotics.

How does Lactic acid bacillus work?

A lactic acid bacillus probiotic that may help restore gut bacteria, for example during or after antibiotics.

How should I take Lactic acid bacillus?

Take as directed, usually once or twice a day; take it 2 to 3 hours apart from antibiotics.

What are the side effects of Lactic acid bacillus?

Common: Wind, bloating. Get help straight away for: Fever or feeling very unwell, especially if your immune system is weak.

Does Lactic acid bacillus interact with other medicines?

Antibiotics can kill it; separate the doses.

Is Lactic acid bacillus safe in pregnancy and breastfeeding?

Considered safe in pregnancy and breastfeeding.

Does Lactic acid bacillus need a prescription in India?

It is usually sold without a prescription in India, but ask a pharmacist if you take other medicines or have a long-term illness.

Which brands contain Lactic acid bacillus?

Doxt-SL, Sporlac.

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.

Last reviewed 31 October 2026. Written by Satya Babu from standard prescribing information.

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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.