Atenolol and Pets
Find out if Atenolol is toxic to dogs and cats.
Think your pet ate something toxic?
Call ASPCA Animal Poison Control Center: (888) 426-4435 or view emergency guide
Atenolol is a human prescription beta-blocker that is dangerous to both dogs and cats. Even a single tablet or a small portion of a tablet can cause life-threatening drops in blood pressure and a dangerously slow heart rate. Pets should never be given atenolol unless it is specifically prescribed and dosed by a veterinarian.
Poisoning usually happens when a pet chews through a pill bottle, finds a dropped tablet, or is accidentally given a human medication by a well-meaning owner. Because pets are much smaller than people and metabolize drugs differently, doses that seem minor can quickly become critical.
Symptoms of atenolol toxicity may appear within 30 minutes to a few hours and can include lethargy, weakness, vomiting, diarrhea, collapse, slow heartbeat, and pale gums. In severe cases, seizures, coma, or death can occur without prompt treatment.
Prevention is essential: store all medications in a secure cabinet out of reach, never leave pills on counters or nightstands, and immediately pick up any dropped tablets. Always consult your veterinarian before giving your pet any medication intended for humans.
Is Atenolol Toxic to Dogs?
Atenolol is a beta-blocker that can cause dangerous drops in blood pressure, a very slow heart rate, and weakness in dogs. Even small doses are potentially life-threatening.
Is Atenolol Toxic to Cats?
Cats are highly sensitive to atenolol. Ingestion can lead to severe bradycardia, low blood pressure, collapse, and potentially death.
Active Ingredients
- atenolol
Common Brand Names
- Tenormin
Dosage Form
oral tablet
Common Uses
- treatment of high blood pressure, angina, and certain abnormal heart rhythms in humans
Toxic Ingredients
- atenolol
Symptoms to Watch For
- lethargy
- weakness
- collapse
- slow heart rate (bradycardia)
- low blood pressure
- vomiting
- diarrhea
- hypoglycemia
- seizures
- coma
- difficulty breathing
What If My Pet Was Exposed to Atenolol?
If you suspect your pet ate atenolol, contact your veterinarian or a pet poison control center immediately. Do not induce vomiting unless instructed by a professional. Bring the medication bottle or label to the vet.
Sources
Vet's Note
PetPilot provides general information for educational purposes. While we reference authoritative veterinary organizations, this page has not been individually reviewed by a veterinarian for your specific pet. Individual animals may react differently based on age, weight, breed, health conditions, and amount consumed. Always consult your veterinarian or a poison control center for personalized advice, especially if your pet is ill, injured, pregnant, nursing, or on medication.