Cat · Felis catus · typical adult weight 2.50–7.00 kg
Ivermectin is used in cat for Ear mites, ectoparasites, Ear mites, scabies, Ear mites (alternative to selamectin). Routes documented in cat: PO, SC, TOPICAL. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 3 cited dose rules for Ivermectin in cat, drawn from published veterinary references. Verify against current literature before clinical use.
Trade names: Ivomec, Heartgard
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 0.2–0.3 mg/kg | once | Single dose; repeat in 14 days | Ear mites, ectoparasites | Moderate | Plumb's Veterinary Drug Handbook, 9th Ed |
| SC | 0.2–0.3 mg/kg | q14d | 2-3 treatments | Ear mites, scabies | Moderate | Plumb's Veterinary Drug Handbook, 9th Ed |
| TOPICAL | 0.2–0.4 mg/kg | once | Single topical application; repeat in 14 days | Ear mites (alternative to selamectin) | Moderate | Plumb's Veterinary Drug Handbook, 9th Ed |
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Potentiates glutamate-gated chloride channels in invertebrate nerve and muscle cells, causing paralysis and death of parasites.
TOXIC to MDR1-mutant dogs (Collies, Shelties, Aussies) at elevated doses. DO NOT use in chelonians (turtles/tortoises). Narrow safety margin in some species. Test MDR1 status before use in herding breeds.
Species-specific contraindications and adverse-reaction reports for cat may differ from canine / feline reference data — consult the primary citations listed with each rule.
Why a species-specific page? Ivermectin pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cat — 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.