Cat · Felis catus · typical adult weight 2.50–7.00 kg
Clemastine is dosed at 0.34–0.67 mg per cat PO q12h in cats, per Miller WH, Scott DW. Clemastine fumarate as an antipruritic agent in pruritic cats - results of an open clinical-trial. Canadian Veterinary Journal-Revue Veterinaire Canadienne. 1994;35:502-504. — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.307 (2026-08-01).. Clemastine is used in cats for Allergic dermatitis / pruritus. Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Clemastine in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Tavist, Dayhist
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 0.34–0.67 mg per catmax 0.67 mg total | q12h | Long-term; typical dose 0.34-0.67mg per cat BID | Allergic dermatitis / pruritus | Weak | Miller WH, Scott DW. Clemastine fumarate as an antipruritic agent in pruritic cats - results of an open clinical-trial. Canadian Veterinary Journal-Revue Veterinaire Canadienne. 1994;35:502-504. — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.307 (2026-08-01). |
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Competitive H1 histamine receptor antagonist that blocks histamine-mediated allergic responses including pruritus, urticaria, and rhinitis.
Sedation is common. Anticholinergic effects (dry mouth, urinary retention). May be more effective than diphenhydramine for canine atopic dermatitis.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Clemastine dose range in cats, with cited source references: PO 0.34–0.67 mg per cat q12h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Clemastine in cats: PO.
Cited course lengths for Clemastine in cats include: Long-term; typical dose 0.34-0.67mg per cat BID. Duration depends on the indication — match it to the specific dose rule in the table above.
Clemastine is indicated in cats for: Allergic dermatitis / pruritus.
These are general warnings for Clemastine across species; consult the cat dosing table above for species-specific guidance. Sedation is common. Anticholinergic effects (dry mouth, urinary retention). May be more effective than diphenhydramine for canine atopic dermatitis.
Why a species-specific page? Clemastine 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.