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.