Drontal Dog

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Drontal Dog

Method of action: Anthelmintic

Treatment option:

Medically reviewed

Laura Arias

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 Drontal Dog

Drontal Dog: Identity, Classification, and Form

Property Description
Active Ingredients Febantel, Praziquantel, Pyrantel
Form Oral Tablet (Chewable)
Pharmacological Class Anthelmintic, Antiparasitic
Common Use Intestinal Parasite Removal / Allwormer in Dogs
Origin Synthetic (Fixed Combination)

Drontal Dog is classified as a broad-spectrum veterinary anthelmintic, a type of antiparasitic drug specifically developed for the comprehensive treatment of internal worm infestations in dogs and puppies. The medication's pharmacological class defines it as an agent used to expel or destroy parasitic worms, known as helminths. The use of multi-agent formulations is designed to widen the spectrum of activity and manage parasite resistance. This combined action principle is clinically recognized for delivering robust treatment outcomes. Drontal Dog is commonly distinguished in the market by its dosage form as a chewable tablet, often marketed in a palatable design to facilitate simple oral administration in the target species.


What is the Fixed Combination in Drontal Dog?

The efficacy of the drug relies on a synthetic fixed combination of three distinct active ingredients: Febantel, Praziquantel, and Pyrantel (commonly as the Pyrantel embonate or pamoate salt). This unique composition strategically combines chemically synthesized compounds from different drug classes—a pro-benzimidazole, a tetrahydropyrimidine, and a pyrazinoisoquinoline derivative—into a single product. Praziquantel, one of its components, acts as an agent effective against tapeworms and other parasitic infections in animals, which establishes its role in combating cestodes. This combination is often a differentiating factor compared to two-way or single-agent formulas. The ingredients are embedded within a solid excipient matrix, which provides the stable tablet structure necessary for accurate delivery of the three active components.


General Purpose and Therapeutic Benefit

The general purpose of Drontal Dog is to function as a powerful allwormer, ensuring effective intestinal parasite removal across the range of common parasitic worms. This is achieved through the synergistic action of its components, which target both roundworms and tapeworms simultaneously, making it suitable for managing typical mixed infections encountered in veterinary practice. By neutralizing the parasitic load through this multi-modal approach, the medication supports the maintenance of normal digestive function and contributes significantly to the overall intestinal health of the animal.

Regulatory References

  1. FDA Drug Label for Praziquantel Tablets (Canine Cestocide)

What side effects are possible with Drontal Dog?

Possible Side Effects and Safety Information

Official regulatory documentation, such as the Summary of Product Characteristics (SmPC) and FDA labeling, provides the safety profile for the combined active ingredients (Febantel, Praziquantel, Pyrantel) in Drontal Dog. Adverse reactions are defined, categorized by their frequency, and grouped by the physiological system affected.


Officially Documented Adverse Reactions

The adverse events reported following treatment are generally classified as very rare (less than 1 in 10,000 animals treated) according to regulatory standards. These reported effects primarily involve the Gastrointestinal disorders system.

System-Organ Class Very Rare Adverse Reactions
Gastrointestinal disorders Vomiting, Diarrhea, Anorexia (loss of appetite)
General disorders Lethargy, Hyperactivity

The reported gastrointestinal effects are typically described as mild and transient.


Safety Constraints and Considerations

The product label includes specific limitations and contraindications based on safety evaluations. Use of the medicine is strictly contraindicated in animals with a known hypersensitivity to any of the active substances or excipients.

Population-Specific Restrictions:

  • Pregnancy: The product is contraindicated during the first and second third of pregnancy in the target species. A single treatment is considered safe only during the last third of pregnancy.
  • Age and Weight: Use is not authorized for puppies less than three weeks of age or those weighing less than two pounds (approximately 0.9 kg).

Drug Interaction Safety: Co-administration with Piperazine compounds is restricted by regulatory bodies due to the potential for pharmacological antagonism, which could compromise the safety and intended effect of the treatment.

Overdose and Emergency Response

Overdose and When to Seek Help

The information below summarizes the overdose profile based exclusively on official government regulatory documentation, such as the Summary of Product Characteristics (SmPC) and FDA Animal Drug labeling.


Documented Overdose Manifestations

Property Official Regulatory Documentation
Documented Manifestations Clinical signs observed at doses significantly higher than recommended are typically mild and transient, and include vomiting, transient loose stools (diarrhea), anorexia, and lethargy [Source 1.1, 2.2].
Severity Classification Officially, the observed signs are classified as slight and transient digestive tract disorders, and the product is noted to be well tolerated in dogs with a wide safety margin [Source 1.1, 2.5].
Population-Specific Notes Although generally well tolerated, regulatory safety studies note that puppies receiving the product showed drug-related side effects such as bloody or mucoid stools, indicating this younger population may require specific observation [Source 1.8].

Required Emergency Actions

Classification Official Regulatory Wording / Basis
Immediate Action Required Authorities mandate that medical advice be sought immediately in case of accidental human exposure [Source 2.3]. For animal overdose, the required action is to contact a veterinarian for assessment and monitoring [Source 2.10].
Antidote Information Management of overdose is directed toward symptomatic and supportive treatment, as no specific antidote is formally documented in the regulatory labeling [Source 2.7].

Connection to the Overall Overdose Profile

Regulatory documents define the overdose profile primarily by listing specific, mild gastrointestinal and behavioral signs that resolve without intervention, reflecting a large safety margin [Source 1.1]. Notwithstanding the low severity of the documented clinical effects, the official guidance requires immediate professional consultation (medical or veterinary) upon any suspected overdose to ensure appropriate clinical monitoring and supportive care are instituted [Source 2.3, 2.10].

Therapeutic Uses of Drontal Dog

What Drontal Dog treats: main uses and benefits

Drontal Dog is a prescription medication utilized to address the presence of various intestinal parasites in canines. The primary therapeutic domain is providing symptomatic support and helping to improve the well-being of dogs affected by these common conditions.

The product is an option for managing infestations involving tapeworms (Dipylidium caninum, Taenia pisiformis, Echinococcus species), roundworms (Toxocara canis, Toxascaris leonina), hookworms (Ancylostoma caninum, Uncinaria stenocephala), and whipworms (Trichuris vulpis). These parasites may contribute to a range of clinical signs, including gastrointestinal distress such as diarrhea or vomiting, as well as changes in appetite or weight.

Veterinary medicine employs this formulation to assist in parasite removal, which is a recognized step in managing the dog’s discomfort and related health issues.


Quick Fact: Relief for Intestinal Parasitic Symptoms


Regulatory References

  1. FDA animal drug labeling and indications

Eligibility and Restrictions for Use

Who Can and Cannot Use Drontal Dog?

This section outlines the official population eligibility and non-eligibility information as documented in government regulatory sources, such as the FDA and EMA.

Populations for whom Use is Contraindicated

  • Hypersensitivity: Dogs with a known allergy or hypersensitivity to the active ingredients (praziquantel, pyrantel pamoate/embonate, febantel) or any of the product's excipients must not use the medicine.
  • Drug Interaction: Simultaneous use with piperazine compounds is contraindicated as the anthelmintic effects may be antagonized.

Age and Weight Restrictions

  • Puppies: The product is not for use in puppies less than 3 weeks of age (U.S. FDA-labeled products) or less than 2 weeks of age (some European products).
  • Weight: Dogs weighing less than 2 lbs (0.91 kg) or, in some regions, less than 3 kg, are excluded from use as the safety margins are not established for this weight range.

Pregnancy and Lactation Eligibility Status

  • Pregnancy: Use is contraindicated during the 1st and 2nd third of pregnancy. A single treatment is permitted and demonstrated safe during the last third of pregnancy or throughout the period of lactation (nursing bitches).

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents define the product's interaction profile through pharmacodynamic and pharmacokinetic mechanisms affecting its three active components: Febantel, Praziquantel, and Pyrantel.

Interaction-Related Restrictions

Classification Interacting Substance/Category
Contraindicated Combination Piperazine-containing anthelmintics
Toxicity Risk Other Cholinergic Compounds

The co-administration of Piperazine is formally contraindicated by regulatory authorities. This restriction is due to a documented pharmacodynamic antagonism where Piperazine may neutralize the effect of the Pyrantel component. Concurrent use with other cholinergic compounds may also lead to a risk of toxicity.

Exposure-Modifying Interactions

The Praziquantel component is subject to pharmacokinetic metabolism primarily through Cytochrome P450 enzymes. This pathway is affected by several medicinal product categories:

  • CYP450 Inducers: Co-administration of strong inducers, such as Phenobarbital, Dexamethasone, or Rifampin, may decrease the plasma concentration of Praziquantel, potentially compromising drug exposure. Regulatory guidance suggests strong inducers like Rifampin may require cessation weeks prior to Praziquantel administration.
  • CYP450 Inhibitors: Conversely, inhibitors (e.g., Cimetidine, Ketoconazole, Erythromycin) may increase plasma concentrations of Praziquantel.

Population-specific interaction notes exist for Praziquantel, where reduced metabolism in patients with moderate to severe liver impairment can lead to considerably higher and longer lasting plasma concentrations. Furthermore, documented interactions with certain substances like Grapefruit Juice and St. John's Wort also relate to P450 enzyme activity.

Mechanism of Action

How Drontal Dog Works

The components of Drontal Dog operate through distinct mechanistic domains, contributing to the broadened range of parasites affected.

Neuromuscular Disruption: Pyrantel and praziquantel disrupt the parasite's motor control. Pyrantel acts as a persistent agonist on nicotinic acetylcholine receptors ( nAChRs) in nematodes. Praziquantel modulates Ca^2+ ion channels in cestodes. This molecular interference causes immediate spastic paralysis, resulting in the inability to maintain position, leading to peristaltic clearance.

Cellular and Metabolic Blockade: Febantel (via its active metabolites) acts as an inhibitor of the parasite's beta -tubulin protein and energy pathways. Blocking microtubule assembly disrupts nutrient uptake and cellular transport, resulting in cellular failure due to starvation and energy depletion. Simultaneously, praziquantel causes structural damage to the tegument, which initiates the physical disintegration cascade.

Dosage and Administration Information

How to Use Drontal Dog: Official Administration Guidelines

This section outlines the parameters for the administration and dosing protocols for Drontal Dog, detailing the established methods for use.


Administration Scope

Instruction Entity Guideline Statement
Route of Administration Oral administration only.
Dosing Schedule Administered as a single oral treatment. The dose is calculated to deliver a minimum of 15 mg/kg Febantel, 14.4 mg/kg Pyrantel (base), and 5 mg/kg Praziquantel.
Timing in Relation to Meals Can be administered with or without food; fasting is not necessary.
Preparation Requirements The animal's body weight must be accurately determined before treatment to select the correct tablet quantity.
Age-Group Rules Not authorized for use in puppies less than 3 weeks of age or those weighing less than 2 lbs (0.9 kg).

Frequency and Procedural Structure

Official protocols define clear schedules for different use scenarios:

  • Routine Adult Control: Treatment is typically administered every 3 months.
  • Heavy Infestation: A repeat dose may be given after 14 days if heavy roundworm infection is confirmed.
  • Puppy/Bitch Schedule: Puppies are treated starting at 2 weeks of age and then every 2 weeks until 12 weeks of age. Nursing bitches follow a similar 2-week cyclic regimen until weaning.

The required administration method allows the tablet to be given directly by mouth or disguised in a small amount of food. The overall use protocol is strictly standardized, focusing on accurate pre-treatment weighing to ensure the necessary minimum dose of the active combination is delivered in a single, defined treatment or scheduled cycle.

Recent Clinical Evidence

Drontal Dog: Recent Clinical Evidence

The research base for this fixed combination is composed of pivotal well-controlled laboratory efficacy studies and supporting clinical field trials that explored its application in dogs presenting with naturally acquired intestinal parasite infections.


Evidence for Broad-Spectrum Status

Studies examined outcomes related to worm count and ova shedding status for the full labeled spectrum, including roundworms, tapeworms, hookworms, and whipworms. The research was evaluated in pivotal well-controlled laboratory efficacy studies, which compared outcomes in treated animals against those in untreated control groups. Findings describe patterns observed where consistently high measurements were reported in the assessment of the difference in worm counts between treated and control groups for the key target species. In clinical field settings, research examined outcomes by monitoring the shedding of eggs. Rapid shifts in the number of eggs passed (FECR) was observed in some studies shortly after administration, and this evidence contributes to the broader evidence landscape regarding the research objectives of evaluating changes in parasite ova shedding and worm burden status.


Research in Specific Populations and Limitations

Studies explored the use of the combination across various cohorts, including puppies and dogs with varying parasite infection risks, such as hunting dogs. Research also included specific studies involving Greyhounds, where variability in outcomes was observed in some studies regarding the sustained control of certain hookworm species.

The evidence highlights what remains uncertain. The primary efficacy assessment was conducted over short-term follow-up durations (days to two weeks), meaning data for certain groups remain insufficient for long-term outcomes. The research was designed to evaluate parasite status following short-term administration and not long-term prevention against subsequent re-infection from the environment. Evidence quality varies across studies, with some field evaluations documented as non-randomized, non-controlled, and non-blinded.

Key Studies & References

  1. Public Assessment Report - VM 00015/0545 (Fixed-Dose Combination Anthelmintic for Dogs)

Frequently Asked Questions (FAQ)

Common questions about Drontal Dog (FAQ)

Q: What should be done if a dog accidentally gets more than the recommended amount?

According to official regulatory safety studies, doses significantly higher than the recommended amount are generally tolerated by dogs. The primary finding observed at very high multiples of the dose is occasional vomiting. Any instance of accidental over-administration should be documented for professional review.

Q: What information is available about the long-term use of the main ingredients?

The primary clinical research on the product focuses on short-term efficacy for treating existing infections. Safety documentation related to the active ingredients indicates that potential effects on the blood, gastrointestinal system, and reproductive health are a consideration following prolonged and repeated exposure.

Q: What if the dog has a known liver or kidney condition; are there special considerations?

Official information indicates that Praziquantel, one of the active components, is rapidly processed in the liver before being eliminated primarily by the kidneys. For dogs with impaired liver function, the elimination half-life of Praziquantel is described as increased, and this results in a longer documented elimination half-life for that component.

Q: Can I crush the tablet and mix it with food?

Official regulatory instructions allow the tablet to be administered directly to the dog or disguised whole in a small amount of food. No explicit regulatory guidance is provided regarding the crushing of the tablets before administration.

Q: What official information is provided about the palatability of the tablets?

Regulatory studies have shown that the tablets are flavored, which is intended to make administration easier. These studies indicate the tablets are palatable and are voluntarily accepted by the majority (88%) of the dogs tested.

Q: Is Drontal Dog the same formulation as Drontal Plus?

Regulatory documents and official product naming frequently refer to this broad-spectrum treatment as 'Drontal Plus' or 'Drontal Allwormer,' depending on the region. This indicates a common fixed combination of the three active ingredients: febantel, pyrantel, and praziquantel.

Q: Are there different versions of Drontal Dog for puppies versus adult dogs?

Yes. The product is available in different tablet sizes that are specifically tailored to distinct weight ranges, such as for puppies and small dogs, medium dogs, and large dogs. These different sizes are intended to support the accurate administration of the required dose based on the animal's weight.

Q: What is the recommended period of time between treatments?

For routine control in adult dogs, the official recommendation is typically treatment every 3 months. Regulatory protocols also describe different schedules for puppies and for cases where a heavy roundworm infestation is confirmed.

Q: Is it necessary to repeat the deworming treatment after a certain number of weeks?

Official protocols specify that a repeat dose may be given after 14 days in cases where a heavy roundworm infestation is confirmed.

Q: Why is it important to treat dogs for tapeworms specifically?

Regulatory warnings about zoonotic potential relate to the presence of Echinococcus spp., a tapeworm targeted by the drug. This parasite is noted in official documentation as representing a hazard for human health.

Q: Is it possible for the dog to experience an allergic-type reaction to Drontal Dog?

The use of the product is strictly contraindicated, or not authorized, in animals with a known hypersensitivity (severe allergic reaction) to any of the active substances or excipients in the tablet.

Q: How were the safety studies conducted for the active ingredients in Drontal Dog?

Animal safety data was established through studies that supported the product's safety profile when used strictly according to the labeled conditions of use. This information is cross-referenced in the original Freedom of Information Summary submitted to the FDA.

Q: Can cats be treated with a product designed for Drontal Dog?

No. Regulatory documentation for Drontal Dog explicitly identifies the Target species as Dogs. Dosage protocols and safety margins are established only for canine use.

Q: Why are the tablets often described as 'flavored'?

Regulatory documents describe the tablets as flavored. This flavoring is designed to make the medication more palatable and to improve the chances of the dog voluntarily accepting the tablet.

Q: Is it common for dogs to become tired or lethargic after taking the treatment?

Lethargy (tiredness) is listed in regulatory documentation as a very rare adverse reaction. This means it is reported in less than 1 animal per 10,000 animals treated, according to the official product summary.

Q: Does the drug cover all stages of the worm lifecycle?

The product's indications specify its intended use against the adult and late immature forms of certain roundworms (Ascarids) and the adult forms of hookworms and tapeworms.

Q: Why do some product labels mention 'zoonotic potential'?

Product labels that mention zoonotic potential refer to the risk of certain animal diseases being transmitted to humans. This is specifically related to the presence of Echinococcus spp., a parasite targeted by the drug, which is noted in official documents as representing a hazard for humans.

Q: Do the ingredients have an effect on bacteria or fungal infections?

The product's pharmacological classification is as an anthelmintic, which means it is an anti-parasitic agent. Its mechanism of action is described as targeting worms and is not classified as having anti-bacterial or anti-fungal properties.

How should Drontal Dog be stored and disposed of?

Storage Requirements

Drontal Dog tablets must be stored at controlled room temperature, specifically between 15^circC and 30^circC (59^circF to 86^circF). The product must be protected from both moisture and light, requiring the container to be kept tightly closed. The official labeling mandates that the medication be stored out of the sight and reach of children and pets.

Stability and Handling

For products sold as scored tablets, the shelf life of any remaining half-tablets after the original blister pack is opened is limited to 7 days and they must then be discarded. The product should be stored away from excessive heat and direct sunlight.

Disposal Instructions

Unused or expired veterinary medicinal product and its waste material must be disposed of in accordance with local regulations. Medicines should not be discarded via household waste or wastewater; regulatory documents typically require the use of authorized take-back schemes.

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

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