Psyllium Husk
Plantago ovata
A Strong clinical evidenceTaken with plenty of water, psyllium husk helps soften stools in constipation; keep a gap between it and other medicines.
Image: Herbadex Botanik Stüdyosu · Özel Üretim
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At a glance
The EMA classes Plantago ovata seed husk (psyllium, ispaghula) as "well-established use" for habitual constipation, when soft stools are needed (e.g. haemorrhoids, anal fissures) and when more dietary fibre is advisable. As an adjunct to diet for high cholesterol it should be used under medical supervision. Drink about 30 ml of fluid per gram.
Updated: October 15, 2026
✓ This herb record is backed by official European Medicines Agency (EMA HMPC) herbal monographs.
What is it used for?
A Strong clinical evidence
Strong clinical evidence: Supported by strong human clinical trials and well-established medicinal use monographs.
How do we rate evidence levels? →May help in habitual constipation and when soft stools are needed, such as with haemorrhoids or anal fissures. [1]
A Strong clinical evidence
Strong clinical evidence: Supported by strong human clinical trials and well-established medicinal use monographs.
How do we rate evidence levels? →May support a diet for high cholesterol as a source of fibre, under medical supervision. [1]
How is it used?
Food
Take 7–11 g a day in 1–3 doses with about 30 ml of water per gram. Do not take it just before bed. It works in 12–24 hours.
Amount: 1–3 times daily
Duration limit: See a doctor if constipation lasts beyond 3 days
[1]Safety & interactions
Minimum age: 6 years
- Taken with too little fluid it can block the throat, oesophagus or bowel; get urgent help for chest pain, vomiting or trouble swallowing or breathing.
- Do not use with bowel obstruction or narrowing, swallowing problems, a change in bowel habit lasting over 2 weeks, or unexplained rectal bleeding.
- It contains strong allergens; people who often inhale the powder can become sensitised.
- Not recommended under 6. In pregnancy and breastfeeding it may be used if a change of diet is not enough.
Drug interactions
| Medicine / substance | Effect | Severity |
|---|---|---|
| Minerals, vitamin B12, heart glycosides (e.g. digoxin), coumarin anticoagulants, carbamazepine, lithium | Absorption may be delayed; leave at least 30–60 minutes between them and psyllium. [1] | Moderate |
| Diabetes medicines | Diabetes treatment may need adjusting; use only under medical supervision. [1] | Moderate |
| Thyroid hormones | The thyroid hormone dose may need adjusting; use under medical supervision. [1] | Moderate |
| Medicines that slow the bowel (e.g. opioids) | Use together only under medical supervision because of the risk of bowel obstruction. [1] | Moderate |
Side effects
- Wind and bloating
- Risk of oesophageal or bowel blockage with too little fluid
- Allergic reactions such as runny nose, red eyes, wheezing and, rarely, anaphylaxis
⚕ When to see a doctor
- If high fever, shortness of breath or purulent/bloody phlegm develops
- If symptoms do not improve within 1–2 weeks or worsen
- If severe abdominal pain, jaundice, rash or allergic reaction occurs
Did you know?
Psyllium is taken with about 30 ml of water per gram; without enough water it can block the throat. [1]
Frequently asked questions
Does psyllium help constipation?
The EMA accepts as well-established use that psyllium husk may help in habitual constipation. Drink about 30 ml of water per gram.
Which medicines does psyllium interact with?
It may delay absorption of minerals, B12, digoxin, anticoagulants such as warfarin, carbamazepine and lithium. People on diabetes or thyroid medicines should ask a doctor.
Does psyllium lower cholesterol?
The EMA accepts its use as a fibre source alongside diet for high cholesterol, under medical supervision.
Can I take psyllium during pregnancy?
It may be used in pregnancy and breastfeeding if a change of diet is not enough; ask your doctor first.
Sources
- Community herbal monograph on Plantago ovata Forssk., seminis tegumentum – Revision 1EMA HMPC · 2013
Cite This Page
Psyllium Husk (Plantago ovata). Herbadex — Doğal Şifa Rehberi (2026). https://herbadex.com/en/herb/psyllium-husk/
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