Cat · Felis catus · typical adult weight 2.50–7.00 kg
Sulfadiazine is dosed at 15–25 mg/kg PO q12h in cats, per Weese JS, Blondeau J, Boothe D, et al. International Society for Companion Animal Infectious Diseases (ISCAID) guidelines for the diagnosis and management of bacterial urinary tract infections in dogs and cats. Vet J. 2019;247:8-25. doi:10.1016/j.tvjl.2019.02.008 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.1223 (2026-08-01).. Sulfadiazine is used in cats for Toxoplasmosis (with pyrimethamine). Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Sulfadiazine in cats, drawn from published veterinary references. Verify against current literature before clinical use.
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 15–25 mg/kg | q12h | 14-28 days | Toxoplasmosis (with pyrimethamine) | Moderate | Weese JS, Blondeau J, Boothe D, et al. International Society for Companion Animal Infectious Diseases (ISCAID) guidelines for the diagnosis and management of bacterial urinary tract infections in dogs and cats. Vet J. 2019;247:8-25. doi:10.1016/j.tvjl.2019.02.008 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.1223 (2026-08-01). |
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These ranges are per kg. Enter your cat's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Competitive inhibitor of dihydropteroate synthase in folate synthesis pathway. Bacteriostatic alone; bactericidal when combined with trimethoprim.
Ensure adequate hydration to prevent crystalluria. KCS risk in dogs with prolonged use. Avoid in hepatic insufficiency. Folate supplementation may be needed.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Sulfadiazine dose range in cats, with cited source references: PO 15–25 mg/kg q12h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Sulfadiazine in cats: PO.
Cited course lengths for Sulfadiazine in cats include: 14-28 days. Duration depends on the indication — match it to the specific dose rule in the table above.
Sulfadiazine is indicated in cats for: Toxoplasmosis (with pyrimethamine).
These are general warnings for Sulfadiazine across species; consult the cat dosing table above for species-specific guidance. Ensure adequate hydration to prevent crystalluria. KCS risk in dogs with prolonged use. Avoid in hepatic insufficiency. Folate supplementation may be needed.
Why a species-specific page? Sulfadiazine pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cats — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.