Dulcolax (Bisacodyl)

Dulcolax Tablets Provide Reliable, Gentle Constipation Relief

Dulcolax (Bisacodyl)
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Short-term relief from occasional constipation

Strength: 5mg

What is Dulcolax?

Dulcolax is a branded treatment for constipation and bowel irregularity that contains the active ingredient Bisacodyl, a stimulant laxative and stool-softener.

What is Dulcolax used for?

The treatment is used for the short term relief of occasional constipation, when other measures have failed. If experiencing constipation, the first recommendation is to try diet and lifestyle measures, such as increasing fluid and fibre intake and increasing physical activitity such as a daily walk or run. If this fails, a bulk-forming laxative such as Fybogel or an osmotic laxative such as Movicol or Laxido is recommended as first line treatment. Following this, if your bowel motions are soft but still difficult to pass, a stimulant laxative such as Dulcolax may be used for short- term relief.  

How does Dulcolax work?

Bisacodyl, the active ingredient in Dulcolax, is a dual-action laxative. Its primary function is to stimulate the nerves that line the walls of the colon in order to get them to contract. This process, known as peristalsis, then encourages stools to move through the colon and into the rectum, making them easier and quicker to pass.

In addition, Dulcolax also softens stools in the colon by encouraging more water and salt to move through them. This makes especially hard or dry stools easier to pass than they otherwise would be.

How long does Dulcolax take to work?

Dulcolax is among the quicker over-the-counter oral remedies for constipation. After taking one tablet, it should begin to work in 6 to 12 hours. However, it’s important to remember that many people don’t feel the effects of Dulcolax at first. In fact, a lot of people report not feeling anything for some time after taking it, before feeling a sudden urge to pass a bowel movement around eight hours in.

How should I take Dulcolax?

Dulcolax tends to take effect at least six hours after it is taken, therefore it’s recommended that one tablet be taken with water just before you go to bed. This is so that the medication will have begun to work upon waking up, increasing the likelihood you’ll be able to pass stool in the morning.

You can take Dulcolax with or without a meal. However, you must not drink milk, use indigestion remedies or take acid reflux medication at the same time you take Dulcolax. This is because it will cause the Dulcolax to not work properly. Leave a one hour gap between taking Dulcolax and these things. 

Who can’t take Dulcolax?

As an over-the-counter treatment, Dulcolax is usually very safe for adults suffering from occasional or chronic constipation. However, it’s important to remember that Dulcolax is not suitable for everyone. In particular, you must tell your GP or pharmacist before taking Dulcolax if you have:

  • Signs of dehydration
  • Been sick or you feel sick
  • Severe stomach pain
  • A serious stomach-related illness, such as a blockage in your bowel, ulcerative colitis, appendicitis, Crohn's disease or muscle weakness in your bowel that stops it moving liquid and food properly
  • An intolerance to certain sugars (the tablets contain small amounts of lactose and sucrose)

What are the side effects of Dulcolax?

Some people who take Dulcolax will experience side effects. These are, however, usually mild. They include:

  • Feeling sick
  • Diarrhoea
  • Abdominal pain or cramps

Rarely, Dulcolax can cause more serious side effects. Contact your doctor right away if you experience any of the following after taking Dulcolax:

  • Feeling dizzy
  • Bloody stools
  • Being sick

Does Dulcolax help with weight loss?

Stimulant laxatives such as Dulcolax do not aid weight loss and should not be used for this purpose. For further information about how to manage your weight safely, you should consult your GP. 

How should I store Dulcolax?

Dulcolax should be stored in a dry, cool environment that does not exceed 25°C.

 Information Leaflet

Always read the patient information leaflet before commencing treatment.

Written and reviewed by our qualified team

GPhC Number: 2088658

Ana Carolina Goncalves
Authored by: Ana Carolina Goncalves Superintendent
Pharmacist

GPhC Number: 2225869

Rehma Gill
Reviewed by: Rehma Gill Pharmacy
Manager

Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 09 Apr 2025

Dulcolax (Bisacodyl) Reviews

Overall Rating
9.6 / 10
Ratings Distribution
5 stars
47
4 stars
4
3 stars
3
2 stars
0
1 star
0

Based on 54 independent customer reviews taken by Feefo, Google and Trustpilot.

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"Quality"

Product Review:

One of the most effective and painless laxatives I have ever used. The price was really competitive. And during this holiday period a very useful addition to the medicine cabinet.

Service Review:

Exactly what I expect from Pharmica. Good quality products, competitive
prices and great delivery service.

Review from: Feefo

TickVerified Buyer

Product Review:

Fast and reliable service

Review from: Trustpilot

TickVerified Buyer

Product Review:

fast,efficient and well priced.thankyou

Review from: Feefo

TickVerified Buyer

"Cheapest on eBay"

Product Review:

Always delivered on time.

Service Review:

Cheapest on eBay

Review from: Trustpilot

TickVerified Buyer

"Great Company"

Product Review:

Great product - arrived quickly - highly recommended !!

Service Review:

Great Service and product

Review from: Feefo

TickVerified Buyer

Product Review:

Great service

Service Review:

Great service

Review from: Feefo

TickVerified Buyer

"Trouble free puchase"

Product Review:

Ordering online was easy and straight forward. The medication I was already familiar with.

Service Review:

Ordering online was easy and trouble free. The medication was one I was already familiar with

Review from: Feefo

TickVerified Buyer

"Dulcolax"

Product Review:

Good supplier and shipment quick and product does what it’s suppose to do 10/10

Service Review:

Supplier great

Review from: Feefo

TickVerified Buyer

Product Review:

Came within two days.use it every three days and result is perfect .
Highly recommend it

Review from: Feefo

TickVerified Buyer

"Excellent service"

Product Review:

Excellent product, excellent service. Thank you

Service Review:

Excellent service

Review from: Feefo

TickVerified Buyer

Discreet service

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Your privacy is important to us. That’s why we’ve taken every step to ensure your order arrives in the most discreet way possible.

From start to finish, your purchase is handled with complete confidentiality. You’ll never see our brand name on your bank statement, bills or delivery papers.

All our parcels are sent in plain, unmarked packaging with no logos, no product descriptions and no indication of what’s inside.

Estimated delivery

Signed For 1st Class

£2.90 - Tuesday 15 April

Collect from your Post Office

£3.95 - Tuesday 15 April

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£5.95 - Tuesday 15 April by 1pm

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£13.95 - Tuesday 15 April by 9am

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from £4.95 - Monday 14 April

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