Bisacodyl
Prescription ·Exploratory record · not publication-reviewed ·Updated July 13, 2026
A diphenylmethane derivative stimulant laxative used for the relief of occasional constipation and for bowel preparation before diagnostic procedures or surgery. Bisacodyl is available in both oral and rectal (suppository) formulations and produces bowel movements within 6–12 hours (oral) or 15–60 minutes (rectal).
Exploratory record, not a reviewed medical publication.
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This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.
What the research says.
A quick, data-only summary. The full evidence, dosing, and sources are below.
A diphenylmethane derivative stimulant laxative used for the relief of occasional constipation and for bowel preparation before diagnostic procedures or surgery. NutriStack rates the supporting evidence as strong. Common adult dosing is Oral: 5–15 mg once daily; Rectal: 10 mg suppository once daily as needed (as prescribed by your physician), though a prescriber sets the actual dose. With long-term use it can deplete potassium. This profile indexes 10 sources.
The bottom line
Evidence rating strong. Most-documented uses: relief of occasional constipation, bowel evacuation before medical procedures, fast-acting rectal formulation available. 10 sources indexed (2006–2025), with 0 interaction records on file.
How it works, mechanistically.
Core mechanism
Directly stimulates sensory nerve endings in the colonic mucosa, increasing peristaltic contractions of the large intestine. Bisacodyl also inhibits water and electrolyte absorption from the intestinal lumen while promoting their secretion, resulting in accumulation of fluid and electrolytes in the colon, further stimulating evacuation.
Dosing & protocol.
Do not crush or chew enteric-coated tablets; do not take within 1 hour of antacids or milk (which can dissolve the enteric coating prematurely)
What it depletes.
Nutrients this medication can lower over time, and what to replace.
Potassium
SignificantStimulant laxative overuse can increase intestinal potassium loss through diarrhea and colonic electrolyte wasting.
Full safety detail.
Side effects
- Abdominal cramping
- Nausea
- Diarrhea
- Electrolyte imbalance with chronic use
- Rectal irritation (suppository form)
- Dependence with prolonged use
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Meta-analyses & systematic reviews
1- 1Low-volume polyethylene glycol and bisacodyl for bowel preparation prior to colonoscopy: a meta-analysisPMIDClark RE, Godfrey JD, Choudhary A et al. · Annals of gastroenterology · 2013
Clark RE, Godfrey JD, Choudhary A et al.. Low-volume polyethylene glycol and bisacodyl for bowel preparation prior to colonoscopy: a meta-analysis. Annals of gastroenterology. 2013
Randomized controlled trials
4- 2Magnetic Resonance Imaging Reveals Novel Insights into the Dual Mode of Action of Bisacodyl: A Randomized, Placebo-controlled Trial in ConstipationPMIDAliyu A, Dellschaft N, Hoad C et al. · Clinical pharmacology and therapeutics · 2025
Aliyu A, Dellschaft N, Hoad C et al.. Magnetic Resonance Imaging Reveals Novel Insights into the Dual Mode of Action of Bisacodyl: A Randomized, Placebo-controlled Trial in Constipation. Clinical pharmacology and therapeutics. 2025
- 3A Randomized Trial Comparing the Bowel Cleansing Efficacy of Sodium Picosulfate/Magnesium Citrate and Polyethylene Glycol/Bisacodyl (The Bowklean Study)PMIDHung SY, Chen HC, Chen WT · Scientific reports · 2020
Hung SY, Chen HC, Chen WT. A Randomized Trial Comparing the Bowel Cleansing Efficacy of Sodium Picosulfate/Magnesium Citrate and Polyethylene Glycol/Bisacodyl (The Bowklean Study). Scientific reports. 2020
- 4Bowel preparation for performing a colonoscopy: prospective randomized comparison study between a low-volume solution of polyethylene glycol and bisacodyl versus bisacodyl and a mannitol solutionPMIDVieira MC, Hashimoto CL, Carrilho FJ · Arquivos de gastroenterologia · 2012
Vieira MC, Hashimoto CL, Carrilho FJ. Bowel preparation for performing a colonoscopy: prospective randomized comparison study between a low-volume solution of polyethylene glycol and bisacodyl versus bisacodyl and a mannitol solution. Arquivos de gastroenterologia. 2012
- 5Efficacy and safety of bisacodyl in the acute treatment of constipation: a double-blind, randomized, placebo-controlled studyPMIDKienzle-Horn S, Vix JM, Schuijt C et al. · Alimentary pharmacology & therapeutics · 2006
Kienzle-Horn S, Vix JM, Schuijt C et al.. Efficacy and safety of bisacodyl in the acute treatment of constipation: a double-blind, randomized, placebo-controlled study. Alimentary pharmacology & therapeutics. 2006
Reference material
5- 6Kamm MA et al. Oral bisacodyl is effective and well-tolerated in patients with chronic constipation. Clin Gastroenterol Hepatol. 2011.Source linkedPMID
- 7Wald A. Constipation: advances in diagnosis and treatment. JAMA. 2016.Source linkedPMID
- 8Abideen ZU et al. Comparing various bowel preparation regimens in constipated patients undergoing colonoscopy: A systematic review and network meta-analysis of randomised controlled trials. Colorectal Dis. 2026.Source linkedPMID
- 9Yi Z, Jie C, Wenyi Z et al.. Comparison of efficacies of vegetable oil based and polyethylene glycol based bisacodyl suppositories in treating patients with neurogenic bowel dysfunction after spinal cord injury: a meta-analysis. The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology. 2014Source linkedPMID
- 10Corsetti M, Landes S, Lange R. Bisacodyl: A review of pharmacology and clinical evidence to guide use in clinical practice in patients with constipation. Neurogastroenterology and motility. 2021Source linkedPMID
Common questions.
Quick answers about Bisacodyl, drawn from the data on this page.
What is Bisacodyl?
A diphenylmethane derivative stimulant laxative used for the relief of occasional constipation and for bowel preparation before diagnostic procedures or surgery. Bisacodyl is available in both oral and rectal (suppository) formulations and produces bowel movements within 6–12 hours (oral) or 15–60 minutes (rectal).
What is Bisacodyl used for?
Commonly cited benefits of Bisacodyl include: Relief of occasional constipation; Bowel evacuation before medical procedures; Fast-acting rectal formulation available; Effective short-term treatment. NutriStack rates the overall evidence as strong.
What is a typical dose of Bisacodyl?
A typical adult dose of Bisacodyl is Oral: 5–15 mg once daily; Rectal: 10 mg suppository once daily as needed (as prescribed by your physician). The commonly recommended form is Enteric-coated tablet or rectal suppository. These are general ranges, not personalized advice; confirm the right dose with a clinician.
What are the side effects of Bisacodyl?
Reported side effects include abdominal cramping, nausea, diarrhea, electrolyte imbalance with chronic use, rectal irritation (suppository form), dependence with prolonged use. This is educational information; check with a healthcare professional before use.
How strong is the evidence for Bisacodyl?
NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.
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