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Prevents mast cells from degranulating — stopping the release of histamine, leukotrienes, and other inflammatory mediators before they trigger symptoms.
Blocks histamine H1 receptors directly at target tissues — a second line of action that manages symptoms even when some mediator release occurs.
Compounded pimobendan oral suspension allows the precise low doses required for toy and small breed dogs with congestive heart failure — doses not achievable by splitting commercial Vetmedin capsules.
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Pimobendan sensitizes cardiac myofilaments to calcium and inhibits phosphodiesterase III, increasing cardiac contractility and causing vasodilation.
Very small and toy breed dogs require doses below those available in commercial tablets. Compounded oral suspension enables precise weight-based dosing.
Pimobendan is the cornerstone of heart failure management in dogs and is standard of care for dilated cardiomyopathy (DCM) and mitral valve disease (MVD). The commercial product, Vetmedin, is available in 1.25mg, 2.5mg, 5mg, and 10mg capsules or chewable tablets.
Very small dogs — Chihuahuas, toy poodles, Maltese, and other breeds under 5kg — often require doses below 1.25mg that cannot be accurately achieved by splitting capsules. Compounded oral suspension in concentrations such as 0.5mg/mL allows these patients to receive precisely dosed pimobendan, which is critical for managing cardiac function and quality of life.
Pimobendan has two distinct mechanisms: it is both a calcium sensitizer and a phosphodiesterase III (PDE-III) inhibitor. As a calcium sensitizer, it increases the sensitivity of cardiac myofilaments to calcium ions, improving myocardial contractility without increasing intracellular calcium (and thus without increasing oxygen demand). As a PDE-III inhibitor, it causes vasodilation, reducing both preload and afterload on the failing heart.
The combination of positive inotropy and vasodilation makes pimobendan uniquely effective for canine heart failure.
Compounded pimobendan suspension is used in dogs for congestive heart failure secondary to dilated cardiomyopathy (DCM) or mitral valve disease (MVD). It is also now used in preclinical (asymptomatic) MVD patients with certain echocardiographic criteria, following the EPIC trial findings, to delay onset of heart failure.
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⚠️ Dosing should be determined by your prescriber. The information below is general guidance only.
Pimobendan is generally very well tolerated. The most common side effects are poor appetite and mild lethargy, which are usually transient. GI signs including vomiting and diarrhea can occur.
At very high doses, pimobendan may cause tachycardia. It should be used cautiously in dogs with hypertrophic cardiomyopathy (HCM), where increasing contractility could worsen outflow obstruction.
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Prevents mast cells from degranulating — stopping the release of histamine, leukotrienes, and other inflammatory mediators before they trigger symptoms.
