Cat · Felis catus · typical adult weight 2.50–7.00 kg
Liothyronine is dosed at 4–6 mcg/kg PO q8-12h in cats, per Plumb's Veterinary Drug Handbook, 9th Ed. Liothyronine is used in cats for Hypothyroidism (iatrogenic, post-I-131). Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Liothyronine in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Cytomel
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 4–6 mcg/kg | q8-12h | May be temporary post-I-131; reassess at 3-6 months | Hypothyroidism (iatrogenic, post-I-131) | Weak | Plumb's Veterinary Drug Handbook, 9th Ed |
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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.
Synthetic triiodothyronine (T3) that directly activates thyroid hormone receptors, increasing basal metabolic rate, protein synthesis, and oxygen consumption.
Short half-life requires multiple daily doses. Narrow therapeutic index. Used when levothyroxine alone is insufficient. Monitor thyroid levels.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Liothyronine dose range in cats, with cited source references: PO 4–6 mcg/kg q8-12h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Liothyronine in cats: PO.
Cited course lengths for Liothyronine in cats include: May be temporary post-I-131; reassess at 3-6 months. Duration depends on the indication — match it to the specific dose rule in the table above.
Liothyronine is indicated in cats for: Hypothyroidism (iatrogenic, post-I-131).
These are general warnings for Liothyronine across species; consult the cat dosing table above for species-specific guidance. Short half-life requires multiple daily doses. Narrow therapeutic index. Used when levothyroxine alone is insufficient. Monitor thyroid levels.
Why a species-specific page? Liothyronine 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.