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Stereochemistry UNKNOWN
Molecular Formula C19H18N4O2
Molecular Weight 334.3718
Optical Activity ( - )
Defined Stereocenters 0 / 1
E/Z Centers 0
Charge 0

Structure of PIMOBENDAN, (-)-






Molecular Formula C19H18N4O2
Molecular Weight 334.3718
Charge 0
Stereochemistry RACEMIC
Additional Stereochemistry No
Defined Stereocenters 0 / 1
E/Z Centers 0
Optical Activity ( + / - )

Curator's Comment: description was created based on several sources, including http://www.ncbi.nlm.nih.gov/pubmed/1660359

Pimobendan (INN, or pimobendane; tradenames Vetmedin, Acardi, and Heartmedin) is a veterinary medication. Under the trade name Acardi, it is available for human use in Japan. Usually, this medicine is used to treat acute heart failure and chronic heart failure (mild to moderate in severity). By increasing the calcium ion sensitivity to protein regulating myocardial contraction and also by inhibiting phosphodiesterase (PDE-III) activity, this medicine dilates the blood vessels and improves the symptoms of heart failure such as shortness of breath and difficulty in breathing. Pimobendan is metabolized into an active metabolite (desmethylpimobendan) by the liver. The parent compound, pimobendan, is a potent calcium sensitizer while desmethylpimobendan is a more potent phosphodiesterase III inhibitor. Pimobendan is 90–95% bound to plasma proteins in circulation. This may have implications in patients suffering from low blood protein levels (hypoproteinemia/hypoalbuminemia) and in patients that are on concurrent therapies that are also highly protein bound.


Curator's Comment: # Boehringer Ingelheim Pharma KG

Approval Year



Primary TargetPharmacologyConditionPotency
Target ID: sensitization of the contractile proteins to Ca2+


ConditionModalityTargetsHighest PhaseProduct

Approved Use



Differential modulation of cytokine production by drugs: implications for therapy in heart failure.
1996 Dec
The novel insulinotropic mechanism of pimobendan: direct enhancement of the exocytotic process of insulin secretory granules by increased Ca2+ sensitivity in beta-cells.
1998 Mar
Effect of pimobendan in patients with chronic heart failure.
2001 Winter
Increased mitral valve regurgitation and myocardial hypertrophy in two dogs with long-term pimobendan therapy.
[If the myofilaments become sensitive: Ca2+-sensitizer for the therapy of heart insufficiency].
2005 Apr 15
Ca2+-sensitisers--a promising option to treat heart failure?
2005 Dec
Selective blockade of nicotinic acetylcholine receptors by pimobendan, a drug for the treatment of heart failure: reduction of catecholamine secretion and synthesis in adrenal medullary cells.
2005 Feb
Pharmacokinetic characterization of transcellular transport and drug interaction of digoxin in Caco-2 cell monolayers.
2005 Jan
Effect of pimobendan on cardiopulmonary baroreflex control of sympathetic nerve activity in healthy young men.
2005 Oct 30
A review of levosimendan in the treatment of heart failure.
Positive inotropic effect of purified green tea catechin derivative in guinea pig hearts: the measurements of cellular Ca2+ and nitric oxide release.
2006 Dec 15
Clinical efficacy of pimobendan versus benazepril for the treatment of acquired atrioventricular valvular disease in dogs.
2006 Jul-Aug
Pimobendan in heart failure therapy--a silver bullet?
2006 Mar-Apr
Syncope secondary to transient atrioventricular block in a German shepherd dog with dilated cardiomyopathy and atrial fibrillation.
2006 May
[Subarachnoid hemorrhage complicated with different manifestations of transient abnormal left ventricular wall motion: two case reports].
2006 May
Preclinical dilated cardiomyopathy in the dobermann.
2006 May 27
Acute heart failure: inotropic agents and their clinical uses.
2006 Nov
New insights in the treatment strategy for pulmonary arterial hypertension.
2006 Oct
Beta-blockers use in patients with chronic obstructive pulmonary disease and concomitant cardiovascular conditions.
Effects of pimobendan for mitral valve regurgitation in dogs.
2007 Apr
[Combined therapy with weight loss and amiodarone improved cardiac function in a patient with idiopathic dilated cardiomyopathy complicated with severe obesity: a case report].
2007 Aug
Translational medicine with a capital T, troponin T, that is.
2007 Jul 20
Knock-in mouse model of dilated cardiomyopathy caused by troponin mutation.
2007 Jul 20
Comparative adverse cardiac effects of pimobendan and benazepril monotherapy in dogs with mild degenerative mitral valve disease: a prospective, controlled, blinded, and randomized study.
2007 Jul-Aug
[Phosphodiesterase III inhibitor--characteristics, mechanisms of action, pharmacokinetics, indications, contraindications, clinical trials, and side effects].
2007 May 28
[Calcium sensitizer: characteristics, mechanisms of action, pharmacokinetics, indication, contraindication, clinical data, and side effects].
2007 May 28
Treatment options in myocarditis: what we know from experimental data and how it translates to clinical trials.
2007 Sep
The value added by measuring myocardial contractility 'in vivo' in safety pharmacological profiling of drug candidates.
2007 Sep-Oct
Effect of short-term treatment with meloxicam and pimobendan on the renal function in healthy beagle dogs.
2008 Apr
Cardiac Ca2+ signaling and Ca2+ sensitizers.
2008 Dec
Effect of pimobendan on case fatality rate in Doberman Pinschers with congestive heart failure caused by dilated cardiomyopathy.
2008 Jul-Aug
Anaesthesia for the geriatric dog and cat.
2008 Jun 1
Validity, reliability, and responsiveness of the Kansas City Cardiomyopathy Questionnaire in anemic heart failure patients.
2008 Mar
Concerns about "Comparative adverse cardiac effects of pimobendan and benazepril monotherapy in dogs with mild degenerative mitral valve disease".
2008 Mar-Apr
Canine heart disease: progress and promise.
2008 Nov
Treatment of congestive heart failure in dogs.
2008 Oct 25
Effect of pimobendan or benazepril hydrochloride on survival times in dogs with congestive heart failure caused by naturally occurring myxomatous mitral valve disease: the QUEST study.
2008 Sep-Oct
Effect of pimobendan on echocardiographic values in dogs with asymptomatic mitral valve disease.
2009 Mar-Apr
Transient tricuspid valve regurgitation following surgical treatment of cor triatriatum dexter in a dog.
2009 May
A randomized, double-blind, placebo-controlled study to determine the effects of valsartan on exercise time in patients with symptomatic heart failure with preserved ejection fraction.
2009 Oct
Readability estimates for commonly used health-related quality of life surveys.
2009 Sep
Acute effect of pimobendan and furosemide on the circulating renin-angiotensin-aldosterone system in healthy dogs.
2009 Sep-Oct
Assessment of the pharmacological effects of inotropic drugs on left ventricular pressure and contractility: an evaluation of the QA interval as an indirect indicator of cardiac inotropism.
2009 Sep-Oct
Sarcomere control mechanisms and the dynamics of the cardiac cycle.
Canine dilated cardiomyopathy: a retrospective study of prognostic findings in 367 clinical cases.
2010 Aug
Patients' self-assessed functional status in heart failure by New York Heart Association class: a prognostic predictor of hospitalizations, quality of life and death.
2010 Feb
Synthesis of new 4,5-3(2H)pyridazinone derivatives and their cardiotonic, hypotensive, and platelet aggregation inhibition activities.
2010 Jan
Human cardiac tissue in a microperfusion chamber simulating extracorporeal circulation--ischemia and apoptosis studies.
2010 Jan 18
ECG of the month. Arrhythmogenic right ventricular cardiomyopathy in a Boxer.
2010 May 1
Refining the human iPSC-cardiomyocyte arrhythmic risk assessment model.
2013 Dec

Sample Use Guides

Acute heart failure: usually for adults, one capsule (2.5 mg of pimobendan) once daily Chronic heart failure (mild to moderate in severity): usually for adults, one capsule (2.5 mg of pimobendan) twice daily after meals
Route of Administration: Oral
In Vitro Use Guide
composite platelet aggregation (area under the curve [AUC]) and maximal platelet aggregation (aggregation units [AUs]) at 10.0μM pimobendan were significantly decreased for collagen-induced aggregation (AUC, 349.7 ± 58.4 vs 285.1 ± 72.2; maximal platelet aggregation, 196.2 ± 25.8 AUs vs 161.5 ± 38.0 AUs), and the AUC and velocity of aggregation at 10.0μM pimobendan were significantly decreased for ADP-induced aggregation (AUC, 268.5 ± 35.1 vs 213.4 ± 77.2; velocity of aggregation, 15.7 ± 2.9 AUs/min vs 11.8 ± 3.5 AUs/min).
Substance Class Chemical
by admin
on Sat Dec 16 11:12:48 UTC 2023
by admin
on Sat Dec 16 11:12:48 UTC 2023
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Created by admin on Sat Dec 16 11:12:48 UTC 2023 , Edited by admin on Sat Dec 16 11:12:48 UTC 2023
Created by admin on Sat Dec 16 11:12:48 UTC 2023 , Edited by admin on Sat Dec 16 11:12:48 UTC 2023
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