Cat · Felis catus · typical adult weight 2.50–7.00 kg
Secnidazole is dosed at 20–30 mg/kg PO Single dose in cats, per Da Silva AS, Castro VSP, Tonin AA, Brendler A, Costa MM, Jaques JA, Bertoletti B, Zanette RA, Raiser AG, Mazzanti CM, Lopes STA, Montiero SG. (2011). Secnidazole for the treatment of giardiasis in naturally infected cats. Parasitol Int. 60, 429-432. doi:10.1016/j.parint.2011.06.024 — Verified against Riviere & Papich, Veterinary Pharmacology and Therapeutics, 10th Ed, p.1159 (2026-08-01).. Secnidazole is used in cats for Giardiasis/Tritrichomonas. Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Secnidazole in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Flagentyl, Solosec
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 20–30 mg/kg | Single dose | Single dose; confirm clearance by fecal testing at 2 weeks | Giardiasis/Tritrichomonas | Weak | Da Silva AS, Castro VSP, Tonin AA, Brendler A, Costa MM, Jaques JA, Bertoletti B, Zanette RA, Raiser AG, Mazzanti CM, Lopes STA, Montiero SG. (2011). Secnidazole for the treatment of giardiasis in naturally infected cats. Parasitol Int. 60, 429-432. doi:10.1016/j.parint.2011.06.024 — Verified against Riviere & Papich, Veterinary Pharmacology and Therapeutics, 10th Ed, p.1159 (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.
5-nitroimidazole prodrug reduced by anaerobic organisms to cytotoxic metabolites that damage DNA and inhibit nucleic acid synthesis.
Longer half-life than metronidazole allows single-dose protocols. Avoid in animals with known nitroimidazole hypersensitivity. Neurotoxicity at high doses.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Secnidazole dose range in cats, with cited source references: PO 20–30 mg/kg Single dose. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Secnidazole in cats: PO.
Cited course lengths for Secnidazole in cats include: Single dose; confirm clearance by fecal testing at 2 weeks. Duration depends on the indication — match it to the specific dose rule in the table above.
Secnidazole is indicated in cats for: Giardiasis/Tritrichomonas.
These are general warnings for Secnidazole across species; consult the cat dosing table above for species-specific guidance. Longer half-life than metronidazole allows single-dose protocols. Avoid in animals with known nitroimidazole hypersensitivity. Neurotoxicity at high doses.
Why a species-specific page? Secnidazole 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.