MedicineOTC

Ispagula

High-fibre drink that relieves constipation.

Clinical information

Common uses

constipation — works in 2 to 3 days

Common side effects

wind
bloating

Cautions

drink plenty of fluids while taking it
mild allergic reaction possible — avoid breathing in the powder
rare risk of serious allergic reaction (anaphylaxis)
children under 6 only if prescribed

Interactions

lithium
carbamazepine
digoxin (heart medicine)
insulin and other diabetes medicines
mesalazine
constipating painkillers such as codeine; separate other medicines by 1 hour

Pregnancy: commonly taken in pregnancy — not harmful

Reference information, not medical advice — always follow your doctor or pharmacist. Source: NHS Medicines A–Z, nhs.uk/medicines/fybogel-ispaghula-husk (accessed 2026-08-16)

Approved brands & formulations2

Brand name	Dosage form	Strength	Importer	Category
Fibril	Oral liquid ( Powder for oral Solution )	3.5 mg	authorized medicine importers	OTC
Fybogel	Oral liquid ( Powder for oral Solution )	3.5 mg	authorized medicine importers	OTC