Methimazole Transdermal for Cat
Cat · Felis catus · typical adult weight 2.50–7.00 kg
Methimazole Transdermal is used in cat for Hyperthyroidism. Routes documented in cat: Transdermal. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Methimazole Transdermal in cat, drawn from published veterinary references. Verify against current literature before clinical use.
Trade names: Methimazole PLO gel
Dose ranges
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| Transdermal | 2.5–5 mg per cat | q12h | Long-term | Hyperthyroidism | Strong | Plumb's Veterinary Drug Handbook, 9th Ed |
Need the exact dose for your patient?
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.
Mechanism of action
Same as oral methimazole. Transdermal delivery through pinna skin avoids GI side effects. Inhibits thyroid peroxidase.
Side effects & warnings
Applied to inner pinna of cat ears. Alternating ears. Handler wears gloves. Less GI upset than oral. Erratic absorption reported. Monitor T4.
Species-specific contraindications and adverse-reaction reports for cat may differ from canine / feline reference data — consult the primary citations listed with each rule.
Other Endocrine drugs with cat dosing
Why a species-specific page? Methimazole Transdermal 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.