Overnight relief from constipation.
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Buy Senna online
Senna is a tablet that speeds up bowel movements to help relieve constipation. It’s a natural laxative derived from the senna plant.
To order Senna, talk to us about your health, and we’ll recommend expert treatments tailored to you.
Starting from £34.95
Here’s what's included in the price:
Consultation
Answer a few questions about your health so we can get to know you better.
Free 24h delivery
Your treatment delivered in secure packaging, the very next day.
Aftercare
We’ll check in with you regularly to see how your treatment is going.
Senna Senna Fruit
What is Senna?
Senna is a laxative derived from the senna fruit, and it’s used to treat constipation. The senna leaf and fruit (also called pods) contain many organic chemicals like sennosides, which have laxative properties. It has been used as a natural laxative and as a traditional medicine for many years.
Constipation can be caused by a few things, such as a lack of fibre in your diet, excessive use of laxatives, or overconsumption of caffeine. These factors can lead to symptoms like infrequent bowel movements and stomach cramps.
How does Senna work?
Senna is a stimulant laxative, meaning it stimulates contractions in your intestine. This speeds up the movement of stool through your lower colon. It also inhibits water absorption in your intestine, which increases stool volume. Both of these mechanisms help to relieve your constipation.
What doses of Senna are there?
Your Senna dosage will depend on your health needs and symptoms. Typically, for adults two tablets are taken every day. And children over 12 years old are generally advised to take one tablet a day.
Medically reviewed by
Dr Alexandra Cristina Cowell
Writer & Clinical Content Reviewer
on September 05, 2023.
Meet Alexandra Cristina 
This page was medically reviewed by Dr Alexandra Cristina Cowell, Writer & Clinical Content Reviewer on September 05, 2023. Next review due on September 05, 2025.
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.
Senna Senna Fruit
How to take Senna
To take Senna, take one or two tablets once a day, near your bedtime. Whilst taking Senna, make sure to drink plenty of water (6-8 glasses) throughout the day for it to work effectively. You’ll usually only take Senna for a few days. If it’s been more than 3 days and you still have constipation, contact your clinician online. Don’t take Senna for more than 7 days.
How long does Senna take to work?
It takes eight hours for Senna to have full effect, which is why it’s recommended to take it before bedtime. This way, by the time it’s morning you’ll be able to relieve yourself.
What happens if I make a mistake when taking Senna?
If you take too much Senna, you can develop ‘lazy bowel’, a condition when the muscle becomes too relaxed and you can’t empty your bowels frequently enough. This can then lead to long-term (chronic) constipation. To avoid this, always make sure to follow the directions given to you by your clinician and read the patient information leaflet.
Medically reviewed by
Dr Alexandra Cristina Cowell
Writer & Clinical Content Reviewer
on September 05, 2023.
Meet Alexandra Cristina This page was medically reviewed by Dr Alexandra Cristina Cowell, Writer & Clinical Content Reviewer on September 05, 2023. Next review due on September 05, 2025.
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.
Reference Popover #ref1
Treated trusted source
Diaz S, Bittar K, Mendez MD.
Constipation. [Updated 2023 Jan 31]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan.
Reference Popover #ref2
Treated trusted source
Le, J., et al. 2021
Pharmacology, Toxicology, and Metabolism of Sennoside A, A Medicinal Plant-Derived Natural Compound. Frontiers in Pharmacology, 12, 714586.
Reference Popover #ref3
Treated trusted source
Morishita, D et al. 2021
Senna Versus Magnesium Oxide for the Treatment of Chronic Constipation: A Randomized, Placebo-Controlled Trial. The American Journal of Gastroenterology 116(1):p 152-161, January 2021
Reference Popover #ref4
Treated trusted source
Balekuduru A and Sahu MK.
Habit forming properties of laxatives for chronic constipation: A review [version 2; peer review: 1 not approved] F1000Research 2023, 11:803
Reference Popover #ref5
Treated trusted source
LiverTox
Clinical and Research Information on Drug-Induced Liver Injury [Internet]. Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases; 2012-. Senna. [Updated 2020 Apr 1].
This page was medically reviewed by Dr Alexandra Cristina Cowell, Writer & Clinical Content Reviewer on September 05, 2023. Next review due on September 05, 2025.
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