Answer
The ispaghula husk in Fybogel Mebeverine usually produces a laxative effect within 12–24 hours after a single dose, although the maximum effect sometimes takes 2–3 days.
Sources for this answer
- Fybogel MebeverineReckitt Benckiser Healthcare (UK) Ltd · emc · SmPC §5.1 Pharmacodynamic properties · Version 17Document updated
Sources checked