ExoticRx · exoticrx.com/drugs/metoprolol
US brand names:Lopressor, Toprol-XL
Metoprolol is dosed at 2–15 mg/cat (NOT mg/kg) PO q8h in cats, per Plumb's Veterinary Drug Handbook, 10th ed (2023, held copy; the original seed cited the 9th, which was never consulted) — corpus p.899 (plumb), located 2026-08-05 by exact figure+drug match (unique, drug within 120 chars). — located 2026-08-05 in Plumb's 10th ed, Metoprolol monograph, printed p.870-872; the earlier note claiming no held source contained this figure was wrong and has been removed. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207. Verify against current literature before clinical use.
Cardioselective beta-1 adrenergic receptor antagonist that reduces heart rate, contractility, and AV conduction.
Avoid abrupt withdrawal. May worsen heart failure initially. Use cautiously in diabetic patients as it may mask hypoglycemic signs.
Species references:All Cat (Domestic) drugsAll Dog (Domestic) drugs
Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.
A dog/cat sample is shown here. Cited dosing for all 2 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.
| Species | Route | Dose | Frequency | Evidence | Source |
|---|---|---|---|---|---|
| Cat (Domestic) | PO | 2–15 mg/cat (NOT mg/kg) | q8h | Moderate | Plumb's Veterinary Drug Handbook, 10th ed (2023, held copy; the original seed cited the 9th, which was never consulted) — corpus p.899 (plumb), located 2026-08-05 by exact figure+drug match (unique, drug within 120 chars). — located 2026-08-05 in Plumb's 10th ed, Metoprolol monograph, printed p.870-872; the earlier note claiming no held source contained this figure was wrong and has been removed. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207 |
| Dog (Domestic) | PO | 0.2–1 mg/kg | q8-12h | Moderate | Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.899 (2026-08-01). — Plumb's 10th ed (held) printed p.870, Metoprolol monograph spanning p.870-872; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, |
Upgrade to Pro or Student to unlock the full dose ranges and frequency for every species. The drug's mechanism, warnings, indications, and cited sources are free to read.
View PlansSource citations and evidence levels available on the live page. Reference only — verify against current literature before clinical use.