Kaolin/Pectin
Kaolin/pectin is an oral gastrointestinal combination product historically used as an anti-diarrheal and adsorbent agent. * **Kaolin** is a naturally occurring hydrated aluminum silicate that is powdered and refined. It is practically insoluble in water. * **Pectin** is a carbohydrate polymer consisting primarily of partially methoxylated polygalacturonic acids, obtained from citrus rinds or apple pomace. **Clinical Pearls & Expert Notes:** > **Efficacy Warning:** The clinical efficacy of kaolin/pectin is highly questionable. While it may improve stool consistency (making it less fluid), studies show it does not decrease stool frequency, water content, or overall weight. It is largely considered obsolete in modern veterinary practice for severe diarrhea. > **Toxicity Alert:** Many human over-the-counter products that formerly contained kaolin/pectin (such as **Kaopectate®**) have been reformulated. In the US, Kaopectate® now contains **bismuth subsalicylate**, which is a salicylate (aspirin-like) compound that can be highly toxic to cats. Always verify the active ingredients of OTC anti-diarrheal liquids before administration.
Mecanismo: Kaolin/pectin acts locally within the gastrointestinal tract through physical binding and coating mechanisms: * **Adsorption:** Kaolin physically binds (adsorbs) to bacteria, enterotoxins, and potentially other noxious substances in the gut lumen, preventing their systemic absorption or local mucosal damage. * **Mucosal Protection:** The viscous suspension coats the inflamed gastrointestinal mucosa, providing a physical barrier against irritation. * **pH Alteration:** The pectin component is broken down into **galacturonic acid** in the intestinal lumen → decreases the local pH, which may create a less favorable environment for certain pathogenic bacteria.
Dosificación por especie
- Diarrhea · 3-4 oz · PO · q2-3h
- Diarrhea · 1-2 mL/kg · PO · q2-6h
- Diarrhea · 1-2 mL/kg · PO · 3-4 times daily
- Diarrhea (Adults) · 4-10 fl. oz. · PO · every 2-4 hours · Until condition improves (max 48 hours without additional treatment)
- Diarrhea (Calves) · 2-3 fl. oz · PO · every 2-4 hours · Until condition improves (max 48 hours without additional treatment)
- Diarrhea · 2-4 quarts per 450 kg body weight · PO · twice daily
- Diarrhea · 1 oz. per 8 kg body weight · PO · 3-4 times a day
- Diarrhea in Foals · 3-4 oz · PO · q6-8h · Authors believe that bismuth subsalicylate is superior
- Diarrhea (Canary or parakeet) · 1 drop PO twice daily; or 1 and ½ dropperful placed in ⅔ oz. drinking water · PO · twice daily
Vías de administración
Contraindicaciones
- Should not be used as the sole treatment for severe or chronic diarrhea
- Should not replace adequate fluid and electrolyte monitoring/replacement therapy
Efectos adversos
- Transient constipation
- Fecal impaction (especially at high doses or in debilitated, very old, or very young patients)
- Increased fecal sodium loss (documented in rats)
Interacciones farmacológicas
- Digoxin · Kaolin/pectin may impair the oral absorption of digoxin. Separate doses by at least 2 hours.
- Lincomycin · Kaolin/pectin may inhibit the oral absorption of lincomycin. Administer kaolin/pectin at least 2 hours before or 3-4 hours after the lincomycin dose.
Monitoreo
- Clinical efficacy (resolution of diarrhea, improvement in stool consistency)
- Fluid and electrolyte status (especially in cases of severe or prolonged diarrhea)
Sobredosis
Overdosage is unlikely to cause any serious systemic effects since the ingredients are not absorbed. However, significant **constipation** or **fecal impaction** requiring medical treatment may occur.
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