Cat · Felis catus · typical adult weight 2.50–7.00 kg
Atenolol is dosed at 1–2 mg/kg PO q12-24h in cats, per Henik RA, Stepien RL, Wenholz LJ, Dolson MK. Efficacy of atenolol as a single antihypertensive agent in hyperthyroid cats. J Feline Med Surg. 2008;10(6):577-582. doi:10.1016/j.jfms.2007.11.008 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.132 (2026-08-01).. Atenolol is used in cats for HCM, hypertension, arrhythmias, Feline aortic thromboembolism risk reduction, Ventricular arrhythmias. Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 3 cited dose rules for Atenolol in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Tenormin
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 1–2 mg/kg | q12-24h | Chronic | HCM, hypertension, arrhythmias | Strong | Henik RA, Stepien RL, Wenholz LJ, Dolson MK. Efficacy of atenolol as a single antihypertensive agent in hyperthyroid cats. J Feline Med Surg. 2008;10(6):577-582. doi:10.1016/j.jfms.2007.11.008 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.132 (2026-08-01). |
| PO | 1–2 mg/kg | q12-24h | Chronic | Feline aortic thromboembolism risk reduction | Moderate | Henik RA, Stepien RL, Wenholz LJ, Dolson MK. Efficacy of atenolol as a single antihypertensive agent in hyperthyroid cats. J Feline Med Surg. 2008;10(6):577-582. doi:10.1016/j.jfms.2007.11.008 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.132 (2026-08-01). |
| PO | 1–2 mg/kg | q12h | Chronic | Ventricular arrhythmias | Moderate | Henik RA, Stepien RL, Wenholz LJ, Dolson MK. Efficacy of atenolol as a single antihypertensive agent in hyperthyroid cats. J Feline Med Surg. 2008;10(6):577-582. doi:10.1016/j.jfms.2007.11.008 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.132 (2026-08-01). |
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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.
Selective beta-1 adrenergic receptor blocker. Reduces heart rate, contractility, and myocardial oxygen demand.
Do not discontinue abruptly (rebound tachycardia). Avoid in decompensated heart failure, severe bradycardia, or AV block. May mask hypoglycemia signs.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Atenolol dose ranges in cats, with cited source references: PO 1–2 mg/kg q12-24h; PO 1–2 mg/kg q12-24h; PO 1–2 mg/kg q12h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Atenolol in cats: PO.
Cited course lengths for Atenolol in cats include: Chronic. Duration depends on the indication — match it to the specific dose rule in the table above.
Atenolol is indicated in cats for: HCM, hypertension, arrhythmias, Feline aortic thromboembolism risk reduction, Ventricular arrhythmias.
These are general warnings for Atenolol across species; consult the cat dosing table above for species-specific guidance. Do not discontinue abruptly (rebound tachycardia). Avoid in decompensated heart failure, severe bradycardia, or AV block. May mask hypoglycemia signs.
Why a species-specific page? Atenolol 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.