The laxative drink for constipation relief.

Fybogel is a powder you mix with water and drink, that acts as a laxative. It can help with constipation and works within three days.
Talk to us about your health, and we’ll recommend expert treatments and offer tailored advice to treat your constipation. Order Fybogel online and get it delivered the very next day.
Fybogel is a laxative taken to treat constipation. Symptoms of constipation may include infrequent bowel movements, difficult or dry stools, and discomfort when you go to the toilet.
Fybogel contains the active ingredient ispaghula husk. It’s a natural plant material that is high in fibre. This makes the digestive system work more efficiently and helps relieve constipation.
Fybogel contains the active ingredient ispaghula husk. Ispaghula can trap 40x its weight in water. So when you take it for constipation, it traps water in your stool. This increases the mass of stool as it passes through your intestine, and triggers your muscles to pass stool. It also softens your stool, making it easier and less painful when you go to the toilet.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Fybogel comes in various flavours. It’s preferable to take it after a meal. To take Fybogel, follow the directions below:
It is recommended to always take Fybogel with water to avoid causing any side effects.
The usual dose for adults is one sachet twice a day (one in the morning and one in the evening).
If you forget to take a dose, skip that dose. Don’t take a double dose to make up for it.
Because Fybogel comes in sachets, you should find it easy to stick to the recommended dose. But if you do accidentally take more than you needed to, drink plenty of water to limit the risk of any side effects, and let your doctor know.
Fybogel starts to work within 12-24 hours. But at times, it can take 2-3 days to become fully effective. If after 3 days you still have constipation, contact our clinicians for advice on what to do next.
It’s best to take Fybogel 30 minutes after a meal, a maximum of 3 times a day. Don't take Fybogel 30 minutes before or after taking any medicine or immediately before going to bed.
Don’t take Fybogel 30 to 60 minutes before or after taking insulin, or after taking medication for thyroid problems. For more information ask our clinicians online.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.
National Health Service (2023). Constipation. (Accessed: 24 May 2023)
Jalanka, J., Major, G., Murray, K., Singh, G., Nowak, A., Kurtz, C., Silos-Santiago, I., Johnston, J. M., & Spiller, R. (2019). The Effect of Psyllium Husk on Intestinal Microbiota in Constipated Patients and Healthy Controls. International Journal of Molecular Sciences, 20(2).
National Health Service (2023). Fybogel. (Accessed: 24 May 2023)
National Health Service (2023). Lactulose. (Accessed: 24 May 2023)
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