Using Atenolol for Cats Heart 

Cats can suffer from a range of heart conditions, causing many owners to worry when they receive the diagnosis. If your cat has been diagnosed with heart conditions such as hypertension or cardiomyopathy, you may be wondering what steps to take to address these health issues. Atenolol is a medication often prescribed for cats to treat these cardiac health problems, but how exactly does it work? Below we’ll explore what Atenolol is and some of the potential safety issues of using it in cats with heart conditions. By understanding more about Atenolol, you can work together with your veterinarian to determine whether it is an appropriate form of therapy for keeping your furry friend healthy. 

What is Atenolol? 

Atenolol is a beta-blocker heart medication primarily used in the treatment of various cardiovascular conditions in humans and animals. It works by blocking the actions of certain hormones, such as adrenaline. The reduction in adrenaline leads to a decrease in heart rate and blood pressure. Atenolol may be prescribed by a veterinarian to manage certain feline heart conditions, such as hypertrophic cardiomyopathy. The medication can reduce any stress that the heart experiences and improve overall cardiac function. As with any medication, it is important to consult a veterinarian to determine the appropriate dosage and monitor your cat to ensure their safety and well-being. An accidental overdose of this drug can lead to life-threatening poisoning due to the narrow margin of safety. 

Atenolol Poisoning Symptoms 

An overdose from this medication can result in heart failure, slowed heart rate, severe hypotension, and acute kidney failure. Common signs to watch out for include: 

  • Nausea 
  • Vomiting 
  • Weakness 
  • Collapse 
  • Slowed heart rate 
  • Lethargy 


If your cat is having a bad reaction to atenolol or accidentally overdosed, you must contact your veterinarian and Pet Poison Helpline at (855) 764-7661 for immediate medical assistance. Aggressive and immediate treatment is necessary, so transport your cat to the veterinary clinic as soon as possible. Your veterinarian may induce vomiting and administer aggressive IV fluids. Your veterinarian will also monitor your cat’s heart and blood pressure and conduct blood work. In severe cases, high-dose insulin therapy or intravenous lipid emulsion will be used. After initial treatment is administered, symptomatic supportive care will be provided.