Psyllium husk (isabgol)

Fibre laxative
ALSO SOLD WITHOUT PRESCRIPTION

Psyllium husk is a fibre laxative found in 2 medicines sold in India, such as Sat Isabgol, Softovac. Below: what it is for, how it works, how to take it, side effects, interactions and pregnancy advice.

Also called: isabgol, ispaghula

What it is used for

Adds bulk to stools to ease constipation and sometimes diarrhoea.

How it works

Isabgol husk is soluble fibre that soaks up water and adds bulk to stools, easing both constipation and loose stools. It can also slightly lower cholesterol.

How to take it

Stir 1 to 2 teaspoons into a full glass of water or milk and drink immediately, then another glass of water. Takes 2 to 3 days to work. Not just before bed.

Common side effects

  • Bloating
  • Wind
  • Stomach cramps when starting

Get medical help straight away if

  • Choking or chest pain after swallowing (always take with plenty of water)
  • Severe constipation or vomiting

Be careful

Take with a full glass of water.

Other medicines and interactions

Take other medicines 2 hours before or after it, as it can reduce their absorption. May lower the dose of insulin or diabetes medicine needed.

Pregnancy and breastfeeding

Safe in pregnancy and breastfeeding; often the first choice for constipation.

Brands of Psyllium husk (1)

Sat Isabgol

Combination medicines that contain Psyllium husk (1)

Softovac

Common questions

What is Psyllium husk used for?

Adds bulk to stools to ease constipation and sometimes diarrhoea.

How does Psyllium husk work?

Isabgol husk is soluble fibre that soaks up water and adds bulk to stools, easing both constipation and loose stools. It can also slightly lower cholesterol.

How should I take Psyllium husk?

Stir 1 to 2 teaspoons into a full glass of water or milk and drink immediately, then another glass of water. Takes 2 to 3 days to work. Not just before bed.

What are the side effects of Psyllium husk?

Common: Bloating, wind, stomach cramps when starting. Get help straight away for: Choking or chest pain after swallowing (always take with plenty of water), severe constipation or vomiting.

Does Psyllium husk interact with other medicines?

Take other medicines 2 hours before or after it, as it can reduce their absorption. May lower the dose of insulin or diabetes medicine needed.

Is Psyllium husk safe in pregnancy and breastfeeding?

Safe in pregnancy and breastfeeding; often the first choice for constipation.

Does Psyllium husk 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 Psyllium husk?

Sat Isabgol, Softovac.

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.