Inhibits bacterial folic acid synthesis and has anti-inflammatory properties: inhibits neutrophil myeloperoxidase, suppresses chemotaxis, and modulates complement activation.
At a glance
Class
Sulfone Antibacterial / Immunomodulator
Storage
Store at room temperature, protect from light
Dosing
Used for immune-mediated skin diseases (pemphigus foliaceus, vasculitis)
Cats are highly susceptible to dapsone toxicity (methemoglobinemia, hemolytic an
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 →Safety
CBC every 2 weeks for first 3 months, then monthlyReticulocyte countMethemoglobinHepatic enzymes
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 →Interactions
No documented interactions.
FAQs
Frequently asked questions
›What is Dapsone?
Dapsone is a sulfone antibacterial / immunomodulator used in pets. Inhibits bacterial folic acid synthesis and has anti-inflammatory properties: inhibits neutrophil myeloperoxidase, suppresses chemotaxis, and modulates complement activation.
›What is Dapsone used for in pets?
Dapsone is used in veterinary medicine for: Used for immune-mediated skin diseases (pemphigus foliaceus, vasculitis); Cats are highly susceptible to dapsone toxicity (methemoglobinemia, hemolytic an.
›What is the Dapsone dose for dogs?
For dogs, Dapsone is typically dosed as follows — Used for immune-mediated skin diseases (pemphigus foliaceus, vasculitis): 1 mg/kg PO q8–12h. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
›What is the Dapsone dose for cats?
For cats, Dapsone is typically dosed as follows — Cats are highly susceptible to dapsone toxicity (methemoglobinemia, hemolytic an: 1 mg/kg PO q12h. Always consult your veterinarian for a dose tailored to your pet's weight, age, and condition.
›Does Dapsone need a prescription?
Yes. Dapsone is a prescription medication and should only be administered under veterinary supervision.
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 →References
References
The PetCare.AI drug reference is built from 13 authoritative sources cited across 580 drug monographs.
Textbooks & handbooks — 5
- Plumb's Veterinary Drug Handbook
- Withrow & MacEwen's Small Animal Clinical Oncology
- Merck Veterinary Manual
- NRC Nutrient Requirements of Dogs and Cats
- Veterinary Pharmacology and Therapeutics (Riviere & Papich)
Clinical guidelines & consensus — 4
- ASPCA Animal Poison Control Center Guidelines
- AAHA Diabetes Management Guidelines
- ASPCA Poison Control Guidelines
- RECOVER CPR Guidelines
Journals & peer-reviewed studies — 2
- EPIC Study (J Vet Intern Med 2016)
- JVIM FAT CAT Study
Regulatory & approvals — 1
- CDSCO Veterinary Drug Approval Registry (1969–2026)
Databases — 1
- Washington State University VCPL MDR1 Database