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Directory Entry

Smectite for Chemotherapy-Induced Diarrhoea in Dogs

Supportive-care medicine · Medical aluminosilicate clays · Dogs · After Chemotherapy · During Chemotherapy · Published Study · Veterinary Clinical Use
Common name: smectite (medical aluminosilicate clay)Editorial source check: Dog Tumor Editorial Team (editorial review; not licensed veterinary review)Last reviewed: Aug 12, 2026Official link: Visit
Directory entry:This page explains what the product, drug, herb, chemotherapy approach, or supportive-care option is. For step-by-step use or monitoring, read related Guides and consult a veterinarian.
Entry kind
Supportive care
Product family
Medical aluminosilicate clays

Quick summary

smectite (medical aluminosilicate clay) is covered as adsorbent gastrointestinal supportive care, with species, evidence, regulatory, safety, interaction and monitoring boundaries for a veterinarian-led decision.

What it is

Adsorbent gastrointestinal supportive care. Medical-grade smectite; composition and quality must be verified for the exact product.

Active ingredients / formula

Medical-grade smectite; composition and quality must be verified for the exact product.

Mechanism / rationale

Smectite is an aluminosilicate clay with adsorbent and mucosal-barrier properties. It does not treat the tumour and does not identify the cause of diarrhoea.

How it is discussed in tumor care

AAHA lists smectite as an option for chemotherapy-induced diarrhoea. It belongs after triage for infection, neutropenia, obstruction, dehydration and other causes that may need different care.

Potential role

AAHA lists smectite as an option for chemotherapy-induced diarrhoea. It belongs after triage for infection, neutropenia, obstruction, dehydration and other causes that may need different care.

Typical use context

Oral supportive material selected by a veterinarian

Evidence snapshot

A randomized open-label canine trial found faster clinical resolution and less rescue metronidazole use in the smectite group. The study was monocentric and does not establish every commercial clay product as equivalent.

Safety notes

Product purity, constipation, hydration and possible binding of other oral medicines matter. Nonmedical clays or human wellness products should not be substituted. Persistent or severe diarrhoea can require fluids, diagnostics or hospital care.

Interactions / cautions

Because adsorbent clays may alter absorption of oral medicines, timing with chemotherapy and supportive drugs must be set by the clinic. Empirical antibiotic use should not be automatic.

Regulatory status

This entry is ingredient-level supportive care, not a claim that every smectite product is an approved veterinary drug. Local product status and quality controls vary.

Regions, labels and market differences

Multi-region clinical use; product regulation and availability vary.

Monitoring plan

Record stool character and frequency, vomiting, appetite, drinking and timing relative to chemotherapy. The veterinarian determines whether blood work, faecal testing, fluids or a different treatment is needed. Blood, black stool, fever, collapse or dehydration needs prompt review.

Questions to ask your veterinarian

  • Does the confirmed diagnosis and species match the evidence population?
  • What is labelled, conditionally authorised or extra-label in this region?
  • Which objective findings will define benefit, toxicity and a change in plan?
  • What household handling, waste and urgent-contact instructions apply?

Sources and further reading