e& Afghanistan
HomeDoctorsAppointmentsHealthProfile
ENدریپښتو
Sign in

e& Afghanistan

See a doctor from your phone — video, voice or chat, in your language.

A digital health service from e& Afghanistan. General health information only — it does not replace a visit to a doctor.

Legal

  • Terms & Conditions
  • Privacy Policy

© 2026 e& Afghanistan. All rights reserved.

  • Home
  • Doctors
  • Appointments
  • Health
  • Profile
Constipation (laxatives)

Ispaghula husk

Also sold as: Fybogel, Metamucil

No prescription neededConstipation (laxatives)
Comes as:PowderSachet

Usual adult dose

Usual adult dose: one sachet (3.5 g) or 1 to 2 level teaspoons stirred into a full glass of water, 1 to 3 times a day. Drink it at once and drink plenty of fluids during the day. Do not take just before lying down.

Your doctor may give you a different dose. Children's doses depend on weight.

Side effects

Common

  • wind
  • bloating
  • stomach cramps for the first few days

Serious — get help

Stop taking it and see a doctor straight away if you notice:

  • choking or blockage of the throat or bowel (if taken without enough water)
  • severe allergic reaction

Do not take it, or take care, if

  • Bowel blockage or difficulty swallowing
  • Sudden change in bowel habit lasting more than 2 weeks, or blood in stool — see a doctor
  • Take other medicines at least 1 hour before ispaghula

Interactions

Medicines that can react with this one.

Minor2 medicinesUsually not a problem, but tell your doctor.
  • Digoxin

    Fibre may reduce digoxin absorption; separate the doses.

  • Levothyroxine

    Fibre can reduce absorption; take levothyroxine at least 1 hour before.

Pregnancy

  1. A
  2. B
  3. C
  4. D
  5. X

Category B

No risk seen in animal studies, but there are few studies in pregnant women. Usually considered safe when needed.

Generic alternatives

Similar medicines your doctor or pharmacist may offer instead.

  • LactuloseNo prescription needed
  • MacrogolNo prescription needed
Check with my other medicines

Always follow your doctor or pharmacistThis page is general information, not a prescription. Do not start, stop or change a medicine on your own.