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Psyllium

Bulk-Forming Laxative / Fiber Supplement
Last reviewed 21 Apr 2026 · PetCare.AI Editorial Team
Species
Dog, Cat
Brands
2 available
Formulations
3

Mechanism of action

Soluble fiber derived from Plantago ovata seed husks that absorbs water in the GI tract, increasing fecal bulk and softening stool. Also useful for diarrhea by absorbing excess water and increasing stool consistency.

At a glance

Class
Bulk-Forming Laxative / Fiber Supplement
Schedule
OTC
Storage
Store in cool, dry place — moisture degrades product

Dosing

🐕

Dog

Useful for constipation, small bowel diarrhea (fiber supplementation), and peria
Dose
Route
PO
Frequency
q12–24h
🐈

Cat

Used for feline constipation and megacolon management
Dose
5–20 mL
Route
PO
Frequency
q12–24h

Formulations

💊

Other — 3

Strength
Strength
Strength

Storage

Store in cool, dry place — moisture degrades product

Safety

Monitoring parameters

Stool consistency and frequencyWater intake

Interactions

No documented interactions.

Brands

Other markets

Metamucil
Konsyl

FAQs

Frequently asked questions

What is Psyllium?
Psyllium is a bulk-forming laxative / fiber supplement used in pets. Soluble fiber derived from Plantago ovata seed husks that absorbs water in the GI tract, increasing fecal bulk and softening stool. Also useful for diarrhea by absorbing excess water and increasing stool consistency.
What is Psyllium used for in pets?
Psyllium is used in veterinary medicine for: Useful for constipation, small bowel diarrhea (fiber supplementation), and peria; Used for feline constipation and megacolon management.
What is the Psyllium dose for dogs?
For dogs, Psyllium is typically dosed as follows — Useful for constipation, small bowel diarrhea (fiber supplementation), and peria: undefined undefined PO q12–24h. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
What is the Psyllium dose for cats?
For cats, Psyllium is typically dosed as follows — Used for feline constipation and megacolon management: 5–20 mL PO q12–24h. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
Does Psyllium need a prescription?
Psyllium is available over the counter. Even so, you should consult your veterinarian before giving any medication to your pet.

References

References

Textbooks & handbooks

  • Plumb, D.C. Plumb's Veterinary Drug Handbook. 10th ed., Wiley-Blackwell, 2023.
  • Vail, D.M., Thamm, D.H., & Liptak, J.M. (eds.). Withrow & MacEwen's Small Animal Clinical Oncology. 6th ed., Saunders/Elsevier, 2020.
  • Riviere, J.E., & Papich, M.G. (eds.). Veterinary Pharmacology and Therapeutics. 10th ed., Wiley-Blackwell, 2018.
  • National Research Council. Nutrient Requirements of Dogs and Cats. National Academies Press, Washington DC, 2006.
  • The Merck Veterinary Manual. Merck & Co., Online edition. https://www.merckvetmanual.com/

Clinical guidelines & consensus

  • Fletcher, D.J., Boller, M., Brainard, B.M., et al. "RECOVER Evidence and Knowledge Gap Analysis on Veterinary CPR." Journal of Veterinary Emergency and Critical Care, 2012;22(S1):S102–S131.
  • American Animal Hospital Association. 2018 AAHA Diabetes Management Guidelines for Dogs and Cats. AAHA Press.

Journals & peer-reviewed studies

  • Hogan, D.F., Fox, P.R., Jacob, K., et al. "Secondary prevention of cardiogenic arterial thromboembolism in the cat: The FAT CAT study." Journal of Veterinary Cardiology, 2015;17(Suppl 1):S306–S317.
  • Boswood, A., Häggström, J., Gordon, S.G., et al. "Effect of Pimobendan in Dogs with Preclinical Myxomatous Mitral Valve Disease and Cardiomegaly: The EPIC Study — A Randomized Clinical Trial." Journal of Veterinary Internal Medicine, 2016;30(6):1765–1779.
  • ASPCA Animal Poison Control Center. Toxicology and Poison Management Guidelines. American Society for the Prevention of Cruelty to Animals. https://www.aspca.org/pet-care/animal-poison-control

Regulatory & approvals

  • Central Drugs Standard Control Organisation (CDSCO), Government of India. Veterinary Drug Approval Registry, 1969–2026. Directorate General of Health Services. https://cdsco.gov.in/

Databases

  • Washington State University, College of Veterinary Medicine. Veterinary Clinical Pharmacology Laboratory (VCPL) — MDR1 Multidrug Sensitivity Database. https://vcpl.vetmed.wsu.edu/
Educational reference only
This information is provided for educational purposes and is not a substitute for professional veterinary advice, diagnosis, or treatment. Always consult a qualified veterinarian before administering any medication to your pet. Find a vet near you →