Cat · Felis catus · typical adult weight 2.50–7.00 kg
Nortriptyline is dosed at 0.5–1 mg/kg PO q12h in cats, per Verified against Veterinary Psychopharmacology (Crowell-Davis), 2nd Ed, p.261 (2026-08-01). — LOCATOR CONVENTION 2026-08-07: the bare 'p.261' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.233; verified by finding the drug named there. If you are holding the book, turn to p.233. — SOURCE EDITION: Veterinary Psychopharmacology (Crowell-Davis) — ISBN 9781119226246, https://openlibrary.org/isbn/9781119226246. Nortriptyline is used in cats for Anxiety / urine marking. Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Nortriptyline in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Pamelor
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 0.5–1 mg/kg | q12h | 4-6 week trial | Anxiety / urine marking | Weak |
| Verified against Veterinary Psychopharmacology (Crowell-Davis), 2nd Ed, p.261 (2026-08-01). — LOCATOR CONVENTION 2026-08-07: the bare 'p.261' in this citation is the PDF index of the held scan, not the printed page. The PRINTED page is p.233; verified by finding the drug named there. If you are holding the book, turn to p.233. — SOURCE EDITION: Veterinary Psychopharmacology (Crowell-Davis) — ISBN 9781119226246, https://openlibrary.org/isbn/9781119226246 |
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.
Active metabolite of amitriptyline. Inhibits norepinephrine reuptake preferentially over serotonin. Anticholinergic, antihistaminic, and alpha-adrenergic blocking properties.
Cardiac toxicity risk — monitor ECG in susceptible species. Anticholinergic effects: dry mouth, urinary retention, constipation. Do not combine with MAOIs.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Nortriptyline dose range in cats, with cited source references: PO 0.5–1 mg/kg q12h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Nortriptyline in cats: PO.
Cited course lengths for Nortriptyline in cats include: 4-6 week trial. Duration depends on the indication — match it to the specific dose rule in the table above.
Nortriptyline is indicated in cats for: Anxiety / urine marking.
These are general warnings for Nortriptyline across species; consult the cat dosing table above for species-specific guidance. Cardiac toxicity risk — monitor ECG in susceptible species. Anticholinergic effects: dry mouth, urinary retention, constipation. Do not combine with MAOIs.
Why a species-specific page? Nortriptyline 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.