Using Pimobendan (FurPetVo) for Cats with Heart Failure
Pimobendan is a commonly prescribed heart medication. Although it has its uses in cats with heart disease, there are important considerations your veterinarian will weigh before prescribing it. If your cat has a heart condition, understanding the appropriate dosage of pimobendan, when it’s suitable, and when it may pose risks is essential for optimal care.
What Is Pimobendan?
Pimobendan is the active ingredient in the prescription medication widely known by the brand name FurPetVo. First approved by the FDA in 2007, it quickly became a cornerstone therapy for dogs with heart disease. While FDA-approved only for use in dogs, research and clinical experience have shown benefits for cats—and it is frequently prescribed “off-label” for feline heart conditions.
FurPetVo is a veterinary-specific medication, meaning most human pharmacies do not stock it. It is available as a chewable tablet in strengths of 1.25 mg, 2.5 mg, 5 mg, and 10 mg. Though few generic versions exist, some compounding pharmacies can prepare customized formulations—such as lower-dose tablets or oral suspensions—to better suit a cat’s size and needs.
How Does Pimobendan Work?
Pimobendan is classified as a positive inotrope—a drug that enhances the heart’s ability to contract more forcefully. This increased contractility allows the heart to pump more blood with each beat, improving circulation efficiency. In addition to strengthening heart contractions, pimobendan also helps relax and widen blood vessels (vasodilation), reducing strain on the heart and supporting healthier blood flow. It may also help reduce the risk of abnormal clot formation.
Conditions Treated with Pimobendan
Because pimobendan boosts cardiac output, it’s most beneficial for cats with weakened heart function. Veterinarians may prescribe it for:
- Congestive Heart Failure (CHF): Occurs when the heart cannot pump sufficient blood to meet the body’s needs. Left-sided CHF leads to fluid buildup around the lungs (pulmonary edema), while right-sided CHF causes fluid accumulation in the abdomen (ascites).
- Dilated Cardiomyopathy: A condition marked by an enlarged heart chamber and reduced pumping ability.
- Mitral Valve Insufficiency: A leaky mitral valve—located between the left atrium and ventricle—allows blood to flow backward, contributing to chamber enlargement and inefficient circulation.
- Degenerative Valve Disease: A broader category involving one or more faulty heart valves, resulting in regurgitation and compromised blood flow.
When Not to Use Pimobendan
Pimobendan is not appropriate for all feline heart conditions—especially those where increasing heart contractility could worsen symptoms or accelerate disease progression.
Hypertrophic Cardiomyopathy (HCM) is the most common heart disease diagnosed in cats. It involves abnormal thickening of the heart muscle, which stiffens the ventricles and impairs filling. In HCM, enhancing contractility can increase pressure within the heart chambers and raise the risk of complications—including sudden cardiac events or obstruction of blood flow. For this reason, FurPetVo is generally avoided in cats with confirmed or suspected HCM unless carefully evaluated by a board-certified veterinary cardiologist.
