Metoprolol and Pets
Find out if Metoprolol 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
Metoprolol is a human beta-blocker used to treat high blood pressure, chest pain, and certain heart rhythm disorders. It is not safe for pets, and even a single dropped pill or a brief exposure to a chewed bottle can cause serious poisoning in dogs and cats.
Pets usually become exposed by eating pills left on counters, nightstands, or dropped on the floor. Chewing an extended-release tablet is especially dangerous because it can release a large amount of medication at once. Because cats and small dogs are tiny compared to typical human doses, the margin of safety is very narrow.
Signs of poisoning may develop quickly and include weakness, vomiting, pale gums, stumbling, very slow heartbeat, low blood pressure, collapse, and seizures. Some effects can be delayed, so early veterinary evaluation is essential even if your pet seems fine at first.
Keep all heart and blood pressure medications in a secure cabinet, pick up dropped pills immediately, and never give your pet any human prescription drug without direct veterinary guidance. If you suspect exposure, seek emergency veterinary care right away.
Is Metoprolol Toxic to Dogs?
Even small doses can cause life-threatening bradycardia, hypotension, and heart failure in dogs.
Is Metoprolol Toxic to Cats?
Cats are highly sensitive; ingestion can lead to severe low blood pressure, slow heart rate, and collapse.
Active Ingredients
- Metoprolol
Common Brand Names
- Lopressor
- Toprol-XL
Dosage Form
tablets, extended-release tablets, injection
Common Uses
- human hypertension, angina, heart failure, arrhythmias
Toxic Ingredients
- Metoprolol
Symptoms to Watch For
- lethargy
- weakness
- collapse
- slow or irregular heartbeat
- low blood pressure
- vomiting
- difficulty breathing
- seizures
- coma
What If My Pet Was Exposed to Metoprolol?
If your pet has eaten or chewed any metoprolol, contact your veterinarian or an emergency poison hotline immediately. Do not induce vomiting unless instructed by a professional. Bring the medication bottle or pill pack to the clinic.
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.