Stimulant laxatives such as Senokot (made from senna pods) and Dulcolax (active ingredient: bisacodyl) are the fastest-working oral laxatives, with overnight results. They stimulate the muscles lining your gut, helping to move things along. They can cause tummy pain, so make sure not to exceed the recommended dose or you’ll be in for an unpleasant night, and prolonged use is not advised because your gut’s muscles can grow dependent on them. Available widely, including from Amazon.
Suppositories containing glycerol or bisacodyl are the fastest workers in the laxative world. They’re a type of stimulant laxative lozenge that you put inside your back passage to encourage the muscles to contract. You’ll need to go (like, really need to go) about 20 minutes after inserting a suppository, so take care with your timing!
Osmotic laxatives, such as lactulose liquid, draw water from the rest of your body and redirect it to your bowel, softening your blockage. They take two or more days to work. Some chemists, such as Lloyds Pharmacy, sell osmotic laxatives online, but you’ll need to fill in a brief pharmacist’s questionnaire before buying. If your child is suffering from constipation, this is the best kind of laxative to try.
Stool-softener laxatives are similar to osmotic laxatives, letting water into your gut to soften what’s inside and make it easier to pass. They include Dulcoease (docusate sodium) capsules, and they’re widely available online.
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Which type of laxative is best for me?
The NHS recommends starting with a bulk-forming laxative. These laxatives are made from natural fibre, and do a really effective job of getting your gut moving if your diet is low on fruit and veg. You’ll need to drink plenty of water, too.
If that doesn’t help, then try a stool-softening or osmotic laxative such as Dulcoease. Next, try a stimulant laxative such as Senokot, or a suppository. Speak to a GP or pharmacist if you’re unsure which laxative to use.
Some people should avoid laxatives completely. Avoid giving stimulant and bulk-forming laxatives to children (unless advised by a doctor). People with certain conditions such as Crohn’s disease or ulcerative colitis should avoid laxatives completely. The charity Guts UK has a great fact sheet here.
