Information extract from Plumb’s, fifth edition:
- Atenolol is a beta-blocker that is often used in small animals for hypertension and tachyarrhythmias
- It has minimal beta-2 activity at common doses
- Atenolol is contraindicated in patients with bradycardic arrhythmias or those hypersensitive to it
- Negative inotrope, so must be used with caution in CHF, renal failure and sinus node dysfunction
- Higher doses may mask symptoms of hyperthyroidism or hypoglycaemia
- Side effects include lethargy, hypotension or diarrhoea
- Withdraw gradually when discontinuing therapy Prescription is required for this medication.