Acardi

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Acardi

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Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Acardi

What is Acardi? (Pimobendan)

Property Description
Active ingredient Pimobendan
Form Oral chewable tablet, typically flavored
Pharmacological class Inodilator, Cardiotonic agent
General purpose Support for compromised heart function in dogs
Origin Synthetic substance, prescription-only

Acardi is a prescription-only, synthetic veterinary cardiac medication intended exclusively for use in canine patients to provide supportive therapy for heart function. The active substance is Pimobendan, which pharmacologically classifies the drug as both a cardiotonic agent and, more specifically, an inodilator. This compound is chemically characterized as a benzimidazole-pyridazinone derivative. The status of Acardi as a prescription-only medicine underscores its use in serious conditions requiring veterinary oversight and diagnosis.


Identity, Differentiation, and Dual Mechanism

The designation as an inodilator signifies a unique action among cardiac medications, operating on two distinct fronts within the cardiovascular system, a property clinically recognized for its comprehensive approach to managing reduced cardiac output. The core identity of Acardi is intrinsically linked to its role as a fundamental maintenance therapy for dogs diagnosed with chronic cardiac issues, a typical scenario being its introduction following the detection of advanced heart disease.

Acardi is formulated as a single-ingredient product, supplied as an easy-to-administer oral chewable tablet, which is often flavored to maximize palatability and compliance in canine patients. The central component, Pimobendan, operates through a precise dual mechanism of action: enhancing cardiac muscle contraction (positive inotropy) and promoting vasodilation (widening of blood vessels). By concurrently strengthening the heart and easing the flow, Acardi serves its general purpose: to improve the efficiency of blood circulation while reducing the overall mechanical stress and workload placed upon the compromised canine heart.

Regulatory References

  1. FDA's Vetmedin (Pimobendan) Freedom of Information Summary

What side effects are possible with Acardi?

Possible Side Effects and Safety Information

The official safety profile of Acardi (Pimobendan) describes adverse events categorized by frequency and the body system affected, based on regulatory documentation from authorities like the EMA and FDA.

Adverse Reaction Scope

The drug's safety information lists adverse events across several System-Organ Classes, with common reports related to Gastrointestinal Disorders (such as vomiting, diarrhoea, and anorexia) and General/Systemic Disorders (including lethargy, weakness, and ataxia).

Classification Examples of Officially Listed Effects
Common (FDA Field Studies) Poor appetite (anorexia), lethargy, diarrhoea, dyspnea (difficulty breathing), weakness, and azotemia (elevated kidney levels).
Rare (EMA Classification) Vomiting, transient diarrhoea, anorexia, and a moderate positive chronotropic effect (slight increase in heart rate).
Very Rare (EMA Classification) Effects on primary haemostasis, which may manifest as petechiae (pinpoint spots) or subcutaneous haemorrhages.

Serious Adverse Reactions and Safety Constraints

The regulatory profile documents serious adverse outcomes, including Sudden Death and CHF Death (Congestive Heart Failure-related death) reported in post-approval field study data. Additionally, rare cases of acute cholestatic liver failure have been reported.

Time- or Dose-Related Patterns: Some effects, such as the positive chronotropic effect and vomiting, may be dose-dependent. Certain events like diarrhoea and lethargy have been noted as transient, while an increase in mitral valve regurgitation has been observed during chronic treatment.

Population-Specific Safety: Acardi is officially contraindicated in dogs with severe hepatic impairment (severe liver function issues) due to its metabolism. Use is also contraindicated in specific anatomical cardiac conditions where augmenting cardiac output is inappropriate, such as Hypertrophic Cardiomyopathies and Aortic Stenosis. Official labeling also notes that safety has not been established in dogs with Diabetes Mellitus, for which regular monitoring is recommended, or in pregnant or lactating animals.

Overdose and Emergency Response

Overdose with Acardi (Pimobendan) is officially documented to cause an exaggeration of the drug’s intended cardiovascular effects. Manifestations listed in regulatory labeling include a positive chronotropic effect, resulting in tachycardia (increased heart rate), hypotension (low blood pressure), heart murmurs, vomiting, and neurological signs such as apathy and ataxia (lack of coordination).

The official product information specifies that chronic administration at high doses, approximately three to five times the maximum recommended level, is associated with an exaggerated hemodynamic response in the heart, potentially leading to cardiac pathology.

In the event of a witnessed or suspected overdose, immediate medical attention is required, as stated in the prescribing information. Treatment must be symptomatic and supportive, officially involving a reduction of the dosage and the initiation of appropriate care to manage the clinical signs. Regulatory documents confirm that no specific antidote is known for Pimobendan overdose.

A specific user safety warning is provided for accidental human ingestion. In such cases, a physician must be consulted immediately, as ingestion, particularly by a child, may result in documented symptoms including tachycardia, orthostatic hypotension, flushing of the face, and headaches.

Therapeutic Uses of Acardi

What Acardi Treats: Main Uses and Benefits

Acardi (Pimobendan) is commonly used across therapeutic domains where additional symptomatic support is needed, such as in the management of canine heart disease.

The medication is relevant for easing symptom clusters that may become intense or disruptive in conditions presenting with preclinical Myxomatous Mitral Valve Disease (MMVD), Dilated Cardiomyopathy (DCM), and established Congestive Heart Failure (CHF). The therapeutic benefit in the asymptomatic context may play a role in managing the progression of the condition.

For dogs with active symptoms, Acardi is applied across domains involving increased patient distress. It addresses symptoms that interfere with daily functioning, such as persistent coughing and rapid breathing, and those related to physical discomfort, like lethargy and weakness. It assists with maintaining functional stability during symptomatic periods and supports the patient during difficult episodes by easing distress.

“This supportive therapy is commonly used when symptoms create noticeable physiological strain and interference with daily comfort.”


Quick Fact: Relief for Respiratory and Physical Symptoms

This medication assists with maintaining functional stability and supports general well-being by easing the overall symptom load associated with systemic or localized discomfort.

Eligibility and Restrictions for Use

This section outlines the official eligibility and non-eligibility information for Acardi (Trimetazidine), strictly based on governmental regulatory documents.

Contraindications and Restrictions

Acardi is contraindicated (must not be used) in patients with:

  • Known hypersensitivity to the active substance or any excipients.
  • Movement disorders, including Parkinson's disease, parkinsonian symptoms, tremors, and restless leg syndrome.
  • Severe renal impairment (creatinine clearance [ CrCl] < 30 mL/min).

Populations requiring restricted or cautious use:

  • Moderate renal impairment (CrCl 30-60 mL/min) requires a lower daily dose as a mandatory safety measure.
  • Elderly patients (over 75 years) require caution and potential dose adjustment due to age-related decline in kidney function, which increases drug exposure.

Age and Reproductive Status

Category Regulatory Status
Children and Adolescents (under 18) Not recommended; safety and efficacy have not been established.
Pregnancy Avoidance is preferred as a precautionary measure due to limited human data.
Breastfeeding Not recommended due to the absence of data on excretion in human milk.

If any movement disorders develop or worsen while using Acardi, the medication must be definitively withdrawn.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents define the product's interaction structure primarily through specific pharmacodynamic effects and a critical drug-food bioavailability constraint.

Field Official Regulatory Statement
Pharmacodynamic Interactions Co-administration with calcium antagonists (e.g., Verapamil, Diltiazem) or beta-adrenergic antagonists (beta-blockers) may attenuate (lessen) the positive inotropic effect of Pimobendan.
Compatible Concurrent Use Pimobendan is documented for use with concurrent therapy for congestive heart failure, which includes the diuretic Furosemide and cardiac glycosides. Pharmacological studies detected no interaction with cardiac glycosides.
Drug-Food Interaction Rule The drug's bioavailability is considerably reduced when administered with food. To optimize absorption, the regulatory labels state that the dose must be administered approximately one hour before feeding.
Population-Specific Note Use is formally restricted in patients with severe impairment of liver function due to the drug's primary hepatic metabolism and the resulting risk of accumulation.

These statements establish the constraints for combining Acardi with other cardiac medicines, define a mandatory administration timing rule related to meals, and identify a restriction based on an impaired metabolic clearance pathway.

Mechanism of Action

Acardi is defined by its inodilator mechanism, which simultaneously targets two critical areas of cardiovascular function: muscle contraction and vascular resistance. Its molecular activity contributes to the modulation of activity within the targeted pathways.

Direct Modulation of Cardiac Contractile Force

This domain centers on the positive inotropic effect. The drug acts as a calcium sensitizer, binding directly to the protein Troponin C within heart muscle cells. This action enhances the sensitivity of the contractile filaments to the calcium already present, promoting enhanced interaction between contractile filaments, increasing the resulting force and velocity of contraction. This mechanism limits the functional increase in free intracellular calcium, differentiating it from mechanisms that rely on high calcium influx.

Regulation of Vascular Tone via PDE3 Inhibition

This domain addresses the reduction of systemic resistance. Acardi functions as a selective inhibitor of the enzyme Phosphodiesterase 3 (PDE3), which is found in blood vessel walls. Inhibition of PDE3 elevates the signaling molecule cAMP, causing the smooth muscle to relax. This cascade modifies early molecular steps that result in balanced vasodilation, which lowers the pressure the heart must pump against (afterload) and the volume filling the heart (preload), decreasing the overall mechanical workload on the myocardium.

Dosage and Administration Information

How Acardi is Used (Pimobendan)

Administration Scope

The usage of Acardi (Pimobendan) is defined by a specific, weight-based administration schedule intended for long-term, continuous oral use. The medicine is supplied as a chewable tablet and must be administered exclusively via the oral route.

Instruction Detail
Route of administration Oral
Dosing schedule (official range) Total daily dose is 0.2 mg/kg to 0.6 mg/kg of body weight.
Timing in relation to meals Administer approximately one hour before feeding (on an empty stomach)
Frequency pattern Twice daily (BID), with doses separated by approximately 12 hours

Official Administration Protocol

The total calculated daily dose must be divided into two equal portions and administered approximately 12 hours apart, such as once in the morning and once in the evening. This divided, twice-daily schedule is utilized to maintain consistent levels of the active substance.

The medicine's effective use depends on its administration relative to meals; therefore, tablets must be given on an empty stomach, specifically about one hour before the animal is fed. The scored tablet may be halved to achieve the correct dose, but must not be broken into smaller pieces than the prescribed half-tablet increment. Furthermore, the drug is not evaluated for use in dogs younger than 6 months of age or those used for breeding.

Recent Clinical Evidence

Acardi: Recent Clinical Evidence


Evidence for Use in Preclinical Heart Disease (MMVD and DCM)

Large-scale, randomized, placebo-controlled trials have examined the use of Acardi in dogs that have not yet developed clinical signs of heart failure (asymptomatic or preclinical stages). Research focused on dogs diagnosed with heart enlargement due to Myxomatous Mitral Valve Disease (MMVD Stage B2) and those with preclinical Dilated Cardiomyopathy (DCM). These studies monitored the time elapsed until the dogs reached a specific composite endpoint, such as the development of overt Congestive Heart Failure (CHF) or specific cardiac events.

Data show patterns related to measurements of overall survival and the time taken to reach the primary endpoint when comparing study groups. Changes in measurements of cardiac size and function were also reported. Evidence is limited for the earliest preclinical stage (MMVD Stage B1) and for the generalizability of DCM findings across all non-specific breeds.


Evidence for Use in Symptomatic Congestive Heart Failure (CHF)

Research evaluated Acardi in trials where dogs were already experiencing symptomatic CHF secondary to MMVD or DCM. The medication was primarily observed alongside other established heart failure therapies as part of a multi-drug regimen. Studies reported measurements of median survival time for symptomatic dogs receiving the combination therapy, and findings describe patterns observed in the management of physical signs like coughing and rapid breathing.

A primary research limitation is that the isolated contribution of the medication is challenging to assess, as it was observed mainly as part of combination therapy. Furthermore, long-term outcomes extending significantly beyond the original trial durations are not fully characterized, and data remain limited regarding the earliest preclinical stage of heart disease.

Frequently Asked Questions (FAQ)

Common questions about Acardi (FAQ)

Q: Will I notice any immediate difference after starting Acardi?

A: Acardi is prescribed as a long-term, continuous oral therapy to help manage chronic, progressive heart conditions. While the medication begins working quickly, the key clinical benefits, such as slowing the progression of heart failure, are generally observed over longer periods of chronic treatment. Monitoring of long-term clinical signs and changes is managed by the veterinary care team.

Q: Why do some people take a lower dose of Acardi?

A: Official dosing guidelines provide a weight-based range for the medication, with an upper and lower limit. The total daily dose is calculated by the veterinarian within this specified regulatory range based on the patient's body weight.

Q: What are the long-term risks associated with Acardi?

A: According to official safety data, the most serious adverse outcomes reported in post-approval studies include sudden death and death related to congestive heart failure. The safety profile notes that chronic treatment has also been associated with an increase in mitral valve regurgitation.

Q: What if I vomit shortly after taking Acardi?

A: Vomiting is a commonly reported adverse effect of the medication. Official administration protocol indicates that if a dose is missed, the next dose is administered at the regularly scheduled time, approximately 12 hours later. A replacement dose is not typically recommended in this scenario.

Q: How does Acardi compare to other antiplatelet medicines?

A: Acardi is classified as an inodilator, meaning it simultaneously strengthens heart muscle contraction and promotes the widening of blood vessels. This dual mechanism is focused on heart function and is pharmacologically distinct from antiplatelet drugs, which work primarily to prevent blood clots.

Q: Can Acardi be crushed or split?

A: Official administration instructions state that the scored chewable tablet may be halved to achieve the correct prescribed dose. However, the tablet must not be broken into smaller portions than a half-tablet increment, and the instructions do not provide guidance for crushing the tablet into a powder.

Q: Is it true that Acardi can interact with pain relievers?

A: Regulatory documents indicate that co-administration with other cardiac medications, specifically calcium antagonists and beta-blockers, may lessen Acardi's effectiveness. Information about all concurrent therapies and supplements should be shared with the prescribing veterinarian.

Q: Is Acardi used for both heart issues and blood clots?

A: Acardi is indicated for supporting heart function in chronic heart disease by improving cardiac contraction and relaxing blood vessels. Its core mechanism of action is focused on cardiovascular performance; it is not indicated for or classified as a treatment for preventing blood clots.

Q: Does Acardi thin the blood, and what does that mean exactly?

A: Acardi is not classified as a blood thinner (anticoagulant). Its mechanism improves heart function and relaxes blood vessels. However, the safety profile notes that, in very rare cases, effects on primary haemostasis (the body’s initial clotting mechanism) have been reported, which may cause minor bleeding signs.

Q: Is it normal to feel a little dizzy when starting Acardi?

A: Dizziness is not listed as a common side effect in the official safety profile. However, the list of commonly reported general adverse events includes lethargy (sluggishness) and weakness. Any new or concerning symptoms observed should be brought to the attention of the veterinary care team.

Q: Can people with kidney problems use Acardi?

A: The safety profile lists azotemia (elevated kidney levels) as a common adverse effect, which is a sign of changes in kidney function. There are no explicit contraindications based on kidney function alone, but monitoring of the patient's overall health and concurrent conditions is a standard part of care when prescribing this medication.

Q: What precautions should I take while I'm on Acardi?

A: Official labeling states the drug should not be used in very young patients (under 6 months of age) or breeding animals. For concurrent conditions, such as Diabetes Mellitus, official labeling notes that regular monitoring is recommended by regulatory authorities.

Q: Do studies show Acardi reduces the risk of stroke?

A: Official research and regulatory claims for Acardi focus on its use in heart failure caused by Myxomatous Mitral Valve Disease (MMVD) and Dilated Cardiomyopathy (DCM). The primary endpoints for the studies involved delaying the onset of Congestive Heart Failure (CHF) and improving survival time, and they do not address stroke risk reduction.

Q: What should I do if I accidentally take two doses of Acardi?

A: In the event of an acute overdose, it is important to know that there is no specific antidote listed for the medication. Contact with the prescribing veterinarian or a veterinary technical support line is advised.

Q: Will Acardi affect my lab test results?

A: Yes, regulatory documentation lists azotemia (elevated kidney levels) as a common adverse effect. This indicates that the medication can affect lab test results, specifically those related to kidney function, which should be monitored by the veterinarian.

Q: Is Acardi available in generic form?

A: The FDA originally approved the brand name product. While some compounded (made-to-order) versions of the active ingredient may exist, regulatory bodies have advised against using unapproved compounded versions and noted that the approved brand-name product should be dispensed.

Q: What are the signs of a serious interaction with Acardi?

A: Serious adverse outcomes reported in the safety profile include Sudden Death and death related to Congestive Heart Failure. Signs of a serious or worsening condition to watch for include difficulty breathing (dyspnea) and unexplained weakness or collapse.

Q: Is there a maximum time someone should take Acardi?

A: No. Acardi is intended for long-term, continuous oral use to manage chronic, progressive heart disease. The duration of therapy is determined by the patient’s overall condition and is not limited to a specific period of time.

Q: Why is it important not to suddenly stop taking Acardi?

A: The medication is prescribed as a long-term, continuous therapy to support heart function in a chronic and progressive condition. Abruptly discontinuing the therapy may result in the progression of the underlying heart disease.

Q: Are there any dietary restrictions specifically for Acardi users?

A: Yes, there is a crucial timing requirement related to feeding. The drug must be administered approximately one hour before feeding because its absorption is significantly reduced when taken with food.

How should Acardi be stored and disposed of?

How to Store and Dispose of Acardi (Pimobendan)

Official regulatory documents define specific requirements for the storage and disposal of Acardi (Pimobendan).

Storage Conditions and Stability

The product must generally be stored at or below 25 C and protected from moisture, with the bottle kept tightly closed where applicable. A critical stability rule states that the shelf life of divided tablets is 3 days; any unused portions must be immediately returned to the original blister pocket and cardboard box. Due to the risk of accidental ingestion, the medication must be stored out of the sight and reach of children and other animals.

Disposal Requirements

Expired or unused Acardi must not be disposed of via wastewater or household waste, as specified in regulatory labeling. All waste materials must be discarded in accordance with local requirements for the disposal of pharmaceutical products.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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