WHOLE BOWEL IRRIGATION IN TOXICOLOGY: A FOCUSED REVIEW ON CURRENT EVIDENCE, CLINICAL INDICATIONS, AND PRACTICAL APPLICATIONS

About Author

Correspondence Address

Dr. Manasi Ashokkumar Chavan,
PG Scholar, Department of Agadatantra,
Dr. D. Y. Patil College of Ayurved & Research Centre, Pimpri, Pune- 18

Contact No. : 8605476396, Email : manasichavan1299@gmail.com

Date of Acceptance : 28 Jun 2026

Date of Publication : 28 Jun 2026

Article ID : SD-IJAY_185

How to cite this article : http://doi.org/10.55552/SDNJAY.2026.4212

Abstract

Whole bowel irrigation (WBI) is a decontamination technique of the gastrointestinal tract that involves enteral administration of large volumes of polyethylene glycol electrolyte solution (PEG-ELS) to remove ingested toxins. In the past, WBI served as an alternative to invasive methods like gastric lavage and syrup of ipecac. But in recent times, with the evolution in toxicology, the routine use of WBI has declined significantly. There is limited solid evidence that shows improvement in clinical outcomes. The American Academy of Clinical Toxicology and the European Association of Poisons Centres recommend inhibiting routine application while excluding the use in scenarios such as sustained-release or enteric-coated drug overdoses, heavy metal poisoning, and ingestion of drug packets. This review critically evaluates current evidence on WBI while discussing its pharmacological rationale, examines contemporary indications and limitations, and provides a controversy analysis.

KEY WORDS:-  Toxicology, Whole Bowel Irrigation, Poison Control, Drugs, Gastric Lavage

Introduction

Gastrointestinal decontamination has developed a lot in recent times. Earlier, many aggressive interventions like gastric lavage, cathartics, syrup of ipecac, activated charcoal, and whole bowel irrigation [1]. With the advancement in evidence-based medicine, these methods were re-evaluated, especially regarding their effects on mortality and clinical outcomes.

Whole bowel irrigation is a method where clear toxins are removed mechanically from the gastrointestinal tract through administration of an osmotically balanced polyethylene glycol electrolyte (PEG-ELS) lavage solution. PEG-ELS causes minimal net absorption or secretion of electrolytes compared to cathartics, which allows rapid intestinal transit with relative physiological stability [2].

Even though WBI has theoretical advantages, it remains controversial. Despite volunteer and observational studies showing a reduction in toxin absorption, reliable controlled clinical trials resulting in improved patient-centred outcomes remain lacking. [2,5]

Discussion

The big question surrounding the whole bowel irrigation (WBI) is whether it really improves patient outcomes, flushing out toxins, not just if it can do this job. In 2015, experts concluded that while WBI might help get rid of certain poisons, there’s no strong proof it improves the outcomes of poisoned patients overall. This conclusion remains a key guide for current contemporary practices.

WBI makes more sense in serious cases where the toxin is physically retained or has slow absorption, like with some drug overdoses, iron pills, lithium, or when substances are smuggled into the body illicitly. For these situations, the pros might outweigh the cons, which include discomfort, it is labour-intensive, and it depends highly on the patient’s cooperation. It also takes nursing time; repeated and careful monitoring is needed.

From someone studying this, we think of WBI as a specialised tool in toxicology, not something which should be used routinely. The discussion should highlight that WBI works best when there’s a clear benefit and the patient is stable enough to handle the process.

Conclusion

WBI has a specific role in contemporary toxicology, even if it's not recommended for regular use based on current evidence. WBI can still help in certain situations, like sustained-release drugs, when activated charcoal fails to adsorb the toxins, and ingested drug packets. But the existing studies have some major drawbacks, so we are still unsure about the benefits yet. Hence, WBI shouldn’t be seen as a usual decon procedure. Instead, it’s more of a specialized intervention to consider when faced with specific poisoning cases where there’s a good physiological reason and no better options available.

References

1. Ontario Poison Centre. Whole bowel irrigation protocol [Internet]. Ontario Poison Centre; 2024 [cited 2026 Jun 4]. Available from: https://www.ontariopoisoncentre.ca/siteassets/pdfs/english/patient-care-resources-documents/whole-bowel-irrigation-protocol-feb-…[guides.library.uq.edu]
2. American Academy of Clinical Toxicology; European Association of Poisons Centres and Clinical Toxicologists. Position statement: whole bowel irrigation. J Toxicol Clin Toxicol. 1997;35(7):753-762. [guides.library.uwa.edu]
3. Thanacoody R, Caravati EM, Troutman WG, et al. Position paper update: whole bowel irrigation for gastrointestinal decontamination of overdose patients. Clin Toxicol (Phila). 2015;53(1):5-12. [pubmed.ncbi.nlm.nih]
4. Ontario Poison Centre. Whole bowel irrigation protocol [Internet]. Ontario Poison Centre; 2024 [cited 2026 Jun 4]. Available from: https://www.ontariopoisoncentre.ca/siteassets/pdfs/english/patient-care-resources-documents/whole-bowel-irrigation-protocol-feb-…[guides.library.uq.edu]
5. Utah Poison Control Center. Whole bowel irrigation [Internet]. Salt Lake City (UT): University of Utah; 2024 [cited 2026 Jun 4]. Available from: https://poisoncontrol.utah.edu/sites/g/files/zrelqx281/files/media/documents/2024/FF-Whole%20Bowel%20Irrigation_FF_011923.pdf[poisoncontrol.utah]
6. Austin Health. Whole bowel irrigation (WBI) guideline [Internet]. Melbourne: Austin Health; 2024 [cited 2026 Jun 4]. Available from: https://www.austin.org.au/Assets/Files/WBI%20Guideline%20V4%2012-2024.pdf[austin.org]