Senna is a herbal laxative that can provide short-term relief from constipation. This herbal medicinal product increases bowel movements to relieve symptoms of constipation.
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What is Senna?

Senna is a medication that provides short-term relief from occasional constipation. Senna is made from leaves and fruit from the senna plant.

How does it work?

Senna is a laxative categorised as a stimulant laxative because it stimulates the muscles that line your gut and help them to move along the bowel movements. 

Is Senna suitable for me?

Senna is suitable for most adults aged over 18. Young people aged 12 to 17 years can take Senna if a doctor or pharmacist says it's okay to do so.

Side Effects

All medications can cause potential side effects, below we have listed some potential side effects, however, these do not always occur.

  • Abdominal pain, spasms and diarrhoea, in particular these effects may be experienced by patients with irritable colon. In these cases, a reduction in dose may be neccessary.
  • Hypersensitivity (allergic) reactions, hives (skin bumps), skin itchiness or local or more widespread, rash or asthma.
  • Can make you more likely to catch infections.
  • Chronic use may lead to albuminuria and haematuria which is albumin or red blood cells in the urine.
  • Yellow or red-brown discoloration of urine may occur, which is harmless.
  • Chronic use may cause pigmentation of the gastroinestinal tract which usually recedes when the product is no longer taken.
  • Low potassium levels in the blood leading to muscle weakness and/or cramps
  • Severe weight loss
  • Changes in the shape of the finger and fingernail, muscular spasms and inflammatation of bones and joints

Disclaimer: This website does not constitute as medical advice, you should also consult with a doctor before taking medication. If you experience any major reactions to any medication you are taking, you must seek immediate medical attention.


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All orders placed before 14:00 on weekdays will be delivered the next working day. For the majority of the UK, medication will be dispatched by Royal Mail, Monday to Friday, if ordered before 14:00. Dispatches are sent using Royal Mail's Next-Day Tracked 24-Hour service. We will email you tracking information directly and you should receive your order the day after dispatch.

Our Discreet Packaging Promise

We know that many of our customers turn to us when they need personal medication, preferring to use our online service rather than shopping for the product face to face. That is why our delivery is always discreetly packaged in plain brown boxes or enveloped. You will not have to worry about any content descriptions, and the package will be for your eyes only!


Commonly Used Dosage Guidelines for Senna.

New users should start with the lowest dose and increase it to the maximum if necessary. Once regularity has been regained dosage should be reduced and stopped.

For adults and children 12 years and over:

  • Swallow one to two tablets at night.

Disclaimer: This website does not provide medical advice. No information listed on this website is intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment before undergoing a new health care regimen, and never disregard professional medical advice or delay in seeking it because of something you have read on this website.

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Why should you take Senna at night?

It's best to take Senna at night so that it begins to work overnight.

Is Senna OK to take daily?

Yes, for adults and children aged over 12 you can take one to two tablets a night. 

Normally it is sufficient to take this medicinal product up to two to three times a week.

Not to be used for more than one week.

What are the ingredients in Senna?

Each tablet contains

  • Powdered Alexandrian Senna fruit (pods) (cassia senna L. (C. acutifolia Delile))
  • Tinnevelly Senna fruit (pods) (Cassia angustifolia Vahl) equivalent to 7.5mg hydroxyanthracene glycosides, calculated as sennoside B.
  • Calcium phosphate, 
  • Maize starch, 
  • Magnesium stearate,
  • Lactose monohydrate.

How quickly do Senna tablets work?

Senna is reported to work after 8-12 hours.

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