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Drontal Puppies

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Drontal Puppies

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Method of action: Anthelmintic

Treatment option:

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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.

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Overview of Drontal Puppies

Property Description
Active ingredients Febantel and Pyrantel
Form Oral suspension (liquid)
Pharmacological class Anthelmintic (Endoparasiticide)
Common use Elimination of intestinal helminths
Origin Synthetic (fixed combination of agents)

What is Drontal Puppies and What Class of Medicine is It?

Drontal Oral Suspension for Puppies is a veterinary medicinal product that functions as a broad-spectrum anthelmintic, commonly known as a dewormer, specifically formulated for the target species of puppies and young dogs. This liquid suspension is one of the distinct formulations within the Drontal product line, positioning it uniquely for easy oral administration in animals that may struggle with solid forms like tablets. It is classified as an endoparasiticide—a drug used to combat and eliminate internal parasites. Anthelmintics combining Febantel and Pyrantel are used for their efficacy against common hookworms and roundworms.


What Active Ingredients are in Drontal Puppies?

The product utilizes a fixed combination of two distinct synthetic active ingredients: Febantel and Pyrantel, which is included in the salt form Pyrantel embonate. This dual-ingredient system is a key differentiating factor. Febantel acts as a pro-drug belonging to the pro-benzimidazole class; once metabolized within the body, it yields the active therapeutic compounds Fenbendazole and Oxfendazole. Pyrantel is classified as a tetrahydropyrimidine derivative that complements Febantel’s action. The pharmacodynamic mechanism of Pyrantel is that of a cholinergic agonist, which leads to rapid muscular effects on the parasite.


What is the General Purpose of This Dual-Action Suspension?

The general purpose of this medication is the elimination of the most common and damaging intestinal helminths, providing comprehensive treatment for infections caused by roundworms and hookworms in young animals. The drug is engineered for synergistic activity, meaning the combination of Febantel and Pyrantel provides a combined effect that is more potent than either agent used alone against the parasites. This principle ensures the effective and complete removal of these endoparasites, which is crucial for relieving the parasitic burden and promoting healthy growth and nutritional absorption in puppies.

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What side effects are possible with Drontal Puppies?

Possible Side Effects and Safety Information

Official regulatory documentation characterizes the safety profile of Drontal Oral Suspension for Puppies based on adverse events reported during post-marketing surveillance. When adverse reactions occur, they are generally described as transient and mild.


Documented Adverse Reactions

The most commonly observed adverse reactions are categorized within Gastrointestinal Disorders. These include signs such as vomiting and diarrhoea.

Adverse Reaction Type Frequency Classification
Gastrointestinal disturbances (Vomiting, Diarrhoea) Not Known (Cannot be estimated from available data)

The regulatory frequency classification of Not Known applies because the data is derived from voluntary reporting rather than controlled clinical trials designed to determine incidence.


Safety Constraints and Restrictions

The product label includes specific contraindications that define the conditions under which the suspension should not be used:

  • Hypersensitivity: The medicine is strictly contraindicated in cases of known hypersensitivity to the active ingredients (Febantel, Pyrantel embonate) or any excipients.
  • Minimum Weight: The suspension is contraindicated for use in puppies weighing less than 0.6 kg.
  • Drug Interactions: The product must not be used simultaneously with compounds containing piperazine.

Population Safety Considerations

The regulatory safety profile also includes specific restrictions regarding reproductive status. The product is not recommended for use in bitches during the first two trimesters of pregnancy or during lactation.

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Overdose and Emergency Response

The official regulatory documentation for Drontal Oral Suspension for Puppies (containing Febantel and Pyrantel) establishes the overdose profile based on documented toxicity studies in the target species. This profile is defined primarily by a wide safety margin, confirming that systemic toxicity is low. Studies confirm that administering doses up to five times the recommended therapeutic level to puppies and young dogs resulted in no observation of any clinical signs of intolerance.

A specific clinical manifestation of overdose was documented only when the dose administered reached a significant level of ten times the recommended therapeutic amount. At this excessive exposure, the first and only sign of intolerance observed was vomiting, which relates to the gastrointestinal tract.

The official regulatory information is notable for what it does not explicitly mandate. The documentation does not detail specific immediate emergency actions, nor does it define explicit triggers or conditions for when urgent medical help must be sought. Furthermore, the official prescribing information does not list a specific antidote or formally describe supportive procedures, such as gastric lavage or required hospital monitoring protocols, for the management of overdose. The regulatory data remains strictly descriptive of the observed toxicology profile.

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Therapeutic Uses of Drontal Puppies

What Drontal Puppies Treats: Main Uses and Benefits

This medicine is applied across domains where additional symptomatic support is needed in the management of gastrointestinal parasites in young dogs. The product is relevant for easing symptoms associated with roundworm and hookworm infections, which are conditions marked by periods of increased physiological stress in puppies. The medicine is indicated for these two types of intestinal helminths.


Supporting Digestive and Intestinal Health

Drontal Puppies is used in situations involving certain distressing symptoms linked to the presence of these parasites. The treatment may assist with managing symptoms related to physical discomfort, which can create noticeable physiological strain and affect daily comfort. In clinical scenarios where short-term symptomatic assistance is needed, this medicine contributes to day-to-day comfort during symptomatic periods.


Promoting Healthy Growth and Development

The medicine assists during symptomatic periods and is commonly used across conditions presenting with acute episodes. “It assists with maintaining functional stability during symptomatic phases,” providing support that helps ease the overall symptom burden.

Quick Fact: Relief for Digestive Discomfort


Minimizing Risk for the Whole Family

Used when symptoms create noticeable physiological strain, the medicine is considered relevant in contexts involving heightened systemic burden. This helps ease the overall symptom burden and may assist with maintaining a sense of stability during difficult episodes.

Regulatory References

  1. Publicly Available Assessment Report for Drontal Oral Suspension for Puppies
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Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Drontal Puppies

Official regulatory documents define the population eligible to use Drontal Oral Suspension for Puppies as puppies and young dogs up to one year of age.


Populations for Whom Use is Contraindicated

The medicine is contraindicated (must not be used) in the following animals, as stated in the regulatory label:

  • Pregnant bitches and lactating bitches.
  • Animals with known hypersensitivity to the active substances, Febantel or Pyrantel, or to any of the product's excipients.
  • Animals simultaneously receiving other compounds containing piperazine.

Age and Weight Restrictions

Safety has not been assessed in puppies younger than two weeks of age or in those weighing less than 0.600 kg.

  • Minimum Age: Treatment is recommended to begin at two weeks of age where epidemiologically appropriate.
  • Target Limit: The product is indicated specifically for young dogs up to one year of age.

Connection to the overall eligibility profile:

Regulatory documentation structures eligibility by establishing a precise target age range and multiple absolute contraindications. The profile mandates exclusion based on reproductive status, hypersensitivity, and specific drug co-administration. Use is further limited by safety data, which is not established for puppies below specific age and weight thresholds.

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What should I know about interactions with other medicines?

The use of this product should be carefully considered in relation to other medicinal products due to a specific documented interaction that can compromise the effectiveness of treatment.

Interacting Substances and Antagonism Risk

The primary interaction involves medicinal products containing the substance piperazine or belonging to the piperazine class of anthelmintics. Regulatory documents strictly advise against the simultaneous use of this product with any compound containing piperazine.

This restriction is due to a known antagonistic mechanism. The active ingredient pyrantel causes a spastic type of paralysis in the target parasites, while piperazine induces a flaccid (neuromuscular) type of paralysis. When these two substances are administered together, their differing effects may counteract one another, potentially reducing the overall efficacy of both medicines against the worms.

Due to the significant risk of reduced treatment effectiveness, this combination is classified as a formal contraindication. Therefore, it is essential to ensure that no other medications, particularly other worming products, contain piperazine when this suspension is administered.

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Mechanism of Action

How Drontal Puppies Works

The pharmacological function of the suspension is rooted in the synergistic action of its two components, Pyrantel and Febantel, which attack the helminth's life functions through two entirely separate pharmacological domains.


Direct Neuromuscular Paralysis

This mechanistic domain is governed by Pyrantel, which acts as an agonist on the parasite's nicotinic cholinergic receptors (nAChR). This sustained activation leads to a depolarizing neuromuscular blockade, forcing the worm into spastic paralysis. This acute physiological change results in the immediate loss of the parasite's muscular control and its inability to remain attached, which results in parasite expulsion via the host's intestinal peristalsis.


Inhibition of Cellular Energy Metabolism

The second domain, mediated by Febantel metabolites, targets the parasite's fundamental structural integrity. These metabolites act as inhibitors of beta-tubulin polymerization, collapsing the cellular transport system. This interference halts glucose uptake and prevents the parasite from replenishing its ATP reserves, which results in terminal failure of the parasite's energy-dependent processes. This dual mechanism targets multiple biological pathways across various parasite life stages.

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Dosage and Administration Information

How to Use Drontal Puppies

Drontal Oral Suspension for Puppies is an anthelmintic product with specific administration rules focusing on the route, dose calculation, and treatment schedule. The preparation contains Febantel (15 mg/ mL) and Pyrantel embonate (14.4 mg/ mL) and is indicated for use in puppies and young dogs up to one year of age.


Administration and Dosing Schedule

The medicine is designated for oral administration only. Use of the product requires the body weight of the animal to be determined as accurately as possible prior to dosing to ensure the correct therapeutic quantity is administered.

Feature Official Labeled Instruction
Route of Administration Oral use only.
Standard Dose 1 mL of suspension per kilogram (kg) of body weight.
Preparation Requirement The container must be mixed thoroughly by inversion before the dose is withdrawn.
Timing in Relation to Meals No special dietary measures or fasting are required. The dose can be given directly or mixed with food.

Treatment Initiation and Frequency

The initial treatment schedule is based on the animal's age to address high infection risk in early life. Administration should begin at 2 weeks of age. The treatment is then performed repeatedly at intervals, typically every two weeks, continuing until the puppy is weaned. Following this initial course, subsequent use should be based on a confirmed infection status.

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Recent Clinical Evidence

Research Evidence / Overview of Studies for Drontal Puppies

Evidence for Use in Eliminating Intestinal Roundworms, Hookworms, and Whipworms

Research has explored the effects of this specific formulation, which contains Febantel and Pyrantel, in the context of research examining common gastrointestinal parasites. The medicine was studied for its application in the context of infections caused by these parasites. The evidence supporting the regulatory evaluation of this medicine against intestinal helminths, such as Toxocara canis, Ancylostoma caninum, and Trichuris vulpis, primarily comes from two study designs: controlled laboratory efficacy trials and field efficacy trials.

The regulatory evaluation describes how these studies examined the drug’s profile when administered to the target population. Research describes that the formulation is a fixed combination of ingredients. Studies explored the formulation's combined action against the target parasites. This section summarizes the structure of the data submitted to and reviewed by governmental regulators for the product’s market authorization.


The Role of Short-Term Anthelmintic Efficacy Studies

The core of the evidence base is structured around measurements of parasite reduction. Studies primarily monitored outcomes related to the change in the parasite burden, which is a functional measure. The main endpoint measured was change in the Faecal Egg Count (FEC). This measurement was used in research to track the change in the number of parasite eggs found in feces after administration.

Furthermore, some controlled laboratory studies explored the outcome using Worm Recovery Counts. This involved a direct count of adult parasites observed in the gastrointestinal tract in post-treatment assessments. Findings described patterns observed in the studies that were used by regulators to characterize the product's performance across the target parasite spectrum.


Study Populations and Administration Contexts

The population included in the pivotal efficacy research consists of puppies and young dogs, typically ranging from two weeks of age up to one year. This specific group was the focus because they represent the target species for the suspension formulation. Results apply only to the populations studied, meaning the research describes group patterns for young animals with confirmed nematode infections.

Data for other age groups or species remains limited, as the regulatory focus and corresponding studies were specific to young dogs with these particular intestinal helminth infections.


Long-Term Data and Extended Follow-up

Research focusing on the long-term effects of the suspension is limited. The follow-up durations were limited, with core efficacy assessments typically conducted within 7 to 14 days following a single administration. As a result, long-term effects are not fully established regarding broader outcomes.

Specifically, there is limited information for long-term outcomes related to overall developmental growth, weight gain, or nutritional absorption over the entire course of a puppy’s early life, as the studies primarily focused on acute parasite clearance.


Research Gaps and Areas for Continued Study

The evidence highlights what is known—and what is still uncertain—about this formulation. Available evidence includes data concerning the recurrence of infection in the target population. Research indicates that while the medicine was observed in studies to affect existing parasites, the management of sustained infection risk is an area of uncertainty.

Furthermore, the potential for resistance development to anthelmintic classes is a factor noted in the evidence landscape. Therefore, the possibility that parasites may develop resistance to the active ingredients is a factor that limits certainty and suggests that research is ongoing in this area.

Key Studies & References

  1. Publicly Available Assessment Report (UKPAR) for Drontal Oral Suspension for Puppies (Febantel/Pyrantel)
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Frequently Asked Questions (FAQ)

Common questions about Drontal Puppies (FAQ)

Q: What specific types of intestinal worms is Drontal Puppies officially approved to treat?

Regulatory documents state that Drontal Oral Suspension for Puppies is indicated for the treatment of roundworms, hookworms, and whipworms. Specifically, these include Toxocara canis, Toxascaris leonina, Ancylostoma caninum, Uncinaria stenocephala, and Trichuris vulpis.


Q: Does Drontal Puppies also treat tapeworms?

The official product information clarifies that the Drontal Oral Suspension for Puppies, which contains Febantel and Pyrantel Embonate, does not control tapeworms. Separate products may be required to treat all types of intestinal parasites.


Q: Is Drontal Puppies approved for use against heartworm?

According to regulatory information, this product is approved solely for treating intestinal helminths, such as roundworm, hookworm, and whipworm. It is not approved for use in the control or treatment of heartworm.


Q: How quickly is the product described as starting to work after administration?

The product’s effect comes from two ingredients. The ingredient Pyrantel acts rapidly by causing spastic paralysis in the parasite. This physiological change results in the loss of muscular control, which may lead to parasite expulsion. The other ingredient, Febantel, causes the parasite to die from energy exhaustion, a process that can take a few days.


Q: Why is deworming puppies described as necessary even if no worms are visible?

Official information indicates that puppies are at high risk of infestation from birth due to transmission before and shortly after they are born (intrauterine and transmammary infection). Routine treatment starting at two weeks of age is recommended in high-risk areas to address this early infection risk.


Q: Can humans catch the intestinal worms that Drontal Puppies treats (zoonotic potential)?

The official product information notes that for some animals, especially in cases of severe infections, a potential risk of ascariasis infection (roundworms) to humans cannot be entirely excluded. The potential for this type of risk is noted in the product information.


Q: What is the main difference between the liquid Drontal Puppy Suspension and Drontal Plus tablets?

Drontal Puppy Suspension contains a fixed combination of Febantel and Pyrantel. Drontal Plus Tablets typically contain an additional third ingredient, Praziquantel, which is used for the control of tapeworms. The difference in active ingredients generally affects the spectrum of parasites covered.


Q: Are anxiety or hyperactivity officially listed as a possible adverse reaction?

Official regulatory documents list hyperactivity as a possible adverse reaction. This adverse effect is classified as very rare, meaning that the available data shows it occurs in less than 1 out of every 10,000 animals treated.


Q: Is it normal for a puppy to experience lethargy or lack of appetite after taking the suspension?

Lethargy (tiredness) and anorexia (decreased appetite) are listed in official product information as possible adverse reactions. This adverse effect is classified as very rare, meaning that the available data shows it occurs in less than 1 out of every 10,000 animals treated.


Q: Are there specific adverse signs that should prompt immediate professional consultation?

The regulatory documents describe that adverse reactions are typically mild and transient. However, when severe signs or signs of intolerance (such as vomiting after a potential overdose) are observed, professional veterinary attention may be required.


Q: Is there an official protocol for treating the mother dog when treating the puppies?

The product is officially contraindicated during the first two trimesters of pregnancy and during lactation. Official studies have examined the product's profile for a single treatment during the last third of pregnancy.


Q: Can Drontal Puppies be administered at the same time as a flea or tick treatment?

The only specific drug interaction warning is against compounds containing the substance piperazine. The product may be administered alongside other treatments, such as typical flea or tick prevention, provided they do not contain piperazine, as this is the only specific substance noted for an adverse interaction.


Q: Is it generally acceptable to use Drontal Puppies alongside common heartworm prevention products?

The regulatory information does not list an interaction with common heartworm prevention products. The only specific contraindication noted in regulatory documents is the co-administration of products containing piperazine.


Q: What official data exists regarding the effects of a potential overdose?

Official regulatory studies showed that puppies tolerated doses of up to five times the recommended level without showing clinical signs of intolerance. At ten times the recommended dose, the first sign of intolerance reported was vomiting.


Q: Are there public health considerations associated with the worms treated by the product?

Yes, regulatory documentation highlights the potential public health risk of ascariasis infection (roundworms) to humans. The product information notes the potential risk is associated with animals having severe infections.


Q: What specific type of worms can pose a risk to human health, as described in product documents?

The official product information specifically notes the potential risk of ascariasis infection, which is caused by roundworms. This is considered a factor when managing highly infected puppies.


Q: How does Drontal Puppies compare to other dewormers in terms of the number of active ingredients it contains?

According to official documentation, Drontal Puppy Suspension contains a fixed combination of two active anthelmintics: Febantel and Pyrantel Embonate.


Q: Is a veterinary prescription always required to obtain Drontal Puppy Suspension?

In the UK, this product is typically classified as NFA-VPS (Non-Food Animal Veterinary Pharmacist Supplied). This means it is available without a veterinary prescription, but it must be supplied by a Pharmacist, Veterinarian, or a suitably qualified person.


Q: Are there different types of Drontal products designed for puppies versus adult dogs?

Yes, this suspension is specifically indicated for puppies and young dogs up to one year of age. Other products in the Drontal family, such as certain tablet formulations, are typically designed and labeled for adult dogs.


Q: Why are there different treatment schedules recommended for puppies versus adult dogs?

Regulatory documents note that the initial, frequent treatment schedule (every two weeks) is recommended for puppies to address the high risk of infection from intrauterine and transmammary transmission that occurs very early in life. Adult dogs typically follow a different treatment frequency.


Q: Is it required to collect and dispose of a puppy's droppings after treatment to minimize reinfestation risk?

Yes, the official product information advises that to minimize the risk of reinfestation and new infection, the puppy's excreta should be collected and properly disposed of for 24 hours following treatment.


Q: Is the product also approved for use in small dogs older than six months?

The product is officially indicated for use in puppies and young dogs up to one year of age. The official weight and age limits must be followed for use.


Q: Is Drontal Puppies intended for use only in the last third of pregnancy?

The product is officially not recommended for the first two trimesters of pregnancy or during lactation. Official studies have examined the product's profile for a single treatment during the last third of pregnancy.


Q: Are the active ingredients in the liquid suspension the same as those found in the Drontal tablet formulation?

The liquid suspension contains Febantel and Pyrantel, which are two of the active ingredients used in the Drontal line. Regulatory documents indicate that the tablet formulation (Drontal Plus) typically contains an additional active ingredient, Praziquantel.

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How should Drontal Puppies be stored and disposed of?

Storage and Disposal of Drontal Oral Suspension for Puppies

The storage and disposal of Drontal Oral Suspension for Puppies must adhere strictly to official regulatory labeling.

Mandatory Storage Conditions

  • The unopened veterinary product requires no special storage conditions.
  • Once the immediate packaging is first opened, the suspension must be stored at a temperature not exceeding 25 °C.
  • The shelf-life is 5 years unopened, but only 12 weeks after opening. The product must not be used after the 12-week post-opening period.
  • The product must be stored out of the sight and reach of children.

Official Disposal Rules

  • Unused medicine and waste must be disposed of in accordance with local requirements.
  • The medicine should not be disposed of via wastewater.

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

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