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Atenolol

Tenormin

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Sourced from published veterinary references. Awaiting credentialed clinical reviewer — our editorial process.

Drug Class

Cardiovascular

Routes

PO

Indications

arrhythmiasCardiac arrhythmiasFeline aortic thromboembolism risk reductionHCMhypertensionSubaortic stenosis rate controlSupraventricular arrhythmiasVentricular arrhythmias

Mechanism of Action

Selective beta-1 adrenergic receptor blocker. Reduces heart rate, contractility, and myocardial oxygen demand.

Side effects & warnings

Do not discontinue abruptly (rebound tachycardia). Avoid in decompensated heart failure, severe bradycardia, or AV block. May mask hypoglycemia signs.

Species with Atenolol dosing data (6 dose rules)

Cat (Domestic)Dog (Domestic)Rabbit (Domestic)

Species references:All Cat (Domestic) drugsAll Dog (Domestic) drugsAll Rabbit (Domestic) drugs

Evidence levels across 6 dose rules

Moderate×3Strong×2Extrapolated×1

Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.

Backed by 2 published sources

  • · Carpenter's Exotic Animal Formulary, 6th Ed
  • · Plumb's Veterinary Drug Handbook, 9th Ed

Sample dosing (2 of 6 cited rules)

A dog/cat sample is shown here. Cited dosing for all 3 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.

SpeciesRouteDoseFrequencyEvidenceSource
Cat (Domestic)PO1–2 mg/kgq12-24hStrongPlumb's Veterinary Drug Handbook, 9th Ed
Dog (Domestic)PO0.25–1 mg/kgq12-24hStrongPlumb's Veterinary Drug Handbook, 9th Ed

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