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Caniquantel plus

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Caniquantel plus

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Treatment option:

Medically reviewed

Marina Burgos

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.

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Overview of Caniquantel plus

Quick Facts

Property Description
Active Ingredients Fenbendazole, Praziquantel
Form Oral Tablet
Pharmacological Class Broad-Spectrum Anthelmintic
Common Use Management of internal parasitic infections
Origin Synthetic Chemotherapeutic Agent

What Type of Veterinary Medicine is Caniquantel plus?

Caniquantel plus is a veterinary anthelmintic categorized as a fixed-dose combination product designed for the management of internal parasitic infections in companion animals, specifically dogs and cats. It is classified as a broad-spectrum antiparasitic agent, typically indicated for systemic administration via an oral tablet preparation. Both active components are synthetic chemotherapeutic agents.

The combination of its two components is used for its effectiveness in clearing intestinal helminth populations, which is characteristic of fixed-dose anthelmintics.


Composition: Fenbendazole and Praziquantel Explained

The core composition relies on the combined action of two distinct molecules. Fenbendazole, a benzimidazole derivative, functions by interfering with the parasite's essential energy metabolism, preventing nutrient uptake. Praziquantel, a pyrazinoisoquinoline derivative, acts by causing rapid muscular paralysis and damaging the parasite's protective outer layer.

Praziquantel is effective against species of cestodes found in domestic animals. The primary general purpose of this approach is to create a synergistic action that targets both nematodes (roundworms) and cestodes (tapeworms), providing a solution for clearing helminth populations through two simultaneous modes of attack.

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What side effects are possible with Caniquantel plus?

Possible Side Effects and Safety Information

The safety profile for this combination product, containing Fenbendazole and Praziquantel, is organized according to classifications established by government regulatory authorities (e.g., EMA, FDA). The officially documented adverse reactions primarily involve the Gastrointestinal System.

Adverse Reaction Scope

Classification Effects Documented in Regulatory Labels
Frequency Gastrointestinal effects like vomiting and diarrhea are typically classified as uncommon or very rare; other reactions may be classified as rare or not known (post-marketing).
System-Organ Classes Primarily Gastrointestinal Disorders, less commonly Immune System Disorders (hypersensitivity) and General Disorders (e.g., transient lethargy).
Serious Reactions Officially documented serious reactions include allergic-type reactions and rare reports of bone marrow hypoplasia, which has been associated with extra-label use of Fenbendazole.

Population-Specific Safety Constraints

Official regulatory labels establish constraints on use for specific populations. The product is contraindicated in animals with a known hypersensitivity to the active ingredients or excipients. Furthermore, the label defines minimum age and weight thresholds for safe use in young animals. For pregnant animals, use is generally not recommended during the first two-thirds of gestation, reflecting a precautionary constraint defined by regulatory documents.

Exposure-Related Safety Patterns

Gastrointestinal effects are usually noted as transient and short-lived. Notably, serious hematological effects, such as bone marrow suppression, have been linked in regulatory reports to extra-label use involving prolonged treatment durations.

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Overdose and Emergency Response

Caniquantel plus, a combination medication containing Praziquantel and Fenbendazole, has a generally high margin of safety in target animal species like dogs, and an overdose is rare when the product is used according to veterinary instructions. Available studies indicate that dogs typically tolerate doses up to three times the recommended amount without serious adverse effects.

Recognizing an Overdose

Symptoms of an overdose are generally gastrointestinal and may include:

  • Vomiting (may be excessive or prolonged)
  • Diarrhea (may be severe or bloody)
  • Excessive salivation or drooling
  • Lethargy or severe depression
  • Restlessness or agitation (more commonly observed in puppies)

When to Seek Veterinary Help

Owners should immediately contact a veterinarian or an animal poison control center if any of the following occur after administration, particularly if a quantity significantly greater than the recommended dose was ingested:

Condition Action Required
Any persistent or worsening symptoms (vomiting, diarrhea, lethargy). Immediate veterinary consultation.
Signs of an allergic reaction (facial swelling, hives, difficulty breathing). Emergency veterinary care.
Ingestion of a very large quantity or an unknown amount. Emergency veterinary care and monitoring.

Treatment for overdose is typically supportive and symptomatic, focusing on managing the gastrointestinal effects and maintaining hydration. The prognosis is generally favorable with prompt care.

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Therapeutic Uses of Caniquantel plus

What Caniquantel plus Treats: Main Uses and Benefits

The primary therapeutic area involves the management of internal parasitic infections in dogs and cats. It is generally used to help address symptom clusters that interfere with daily functioning and often lead to systemic discomfort.

Comprehensive Clearance and Symptom Support

This treatment is applied in clinical settings for the management of mixed parasitic infections, encompassing both cestodes (tapeworms) and multiple species of nematodes (roundworms, hookworms, and whipworms). Such formulations are commonly used for the control of adult roundworm, hookworm, whipworm, and tapeworm species. Managing this wide range of parasites may assist with supportive relief by addressing the infectious cause of illness.

The medication helps address symptoms related to gastrointestinal distress, including chronic diarrhea and vomiting, and subsequent nutritional impairment, such as unexplained weight loss. Offering symptomatic relief contributes to improved day-to-day comfort and supports the patient during episodes of heightened discomfort.

This treatment is commonly used across conditions presenting with recurrent or episodic parasitic manifestations and is relevant in contexts requiring proactive control for susceptible groups like weaned juveniles. This treatment is considered relevant for managing specific parasites, like Echinococcus and Toxocara, that carry a zoonotic risk. This provides a benefit by reducing environmental contamination and supports the maintenance of functional stability within the household environment.


“The primary goal is to address the source of illness by clearing the most common helminth populations, which supports the pet's return to functional stability.”

Quick Fact: Relief for Digestive Discomfort

Indication Area Therapeutic Focus
Conditions Treated Mixed worm infections (Cestodes, Nematodes), and Giardiasis
Symptoms Managed Diarrhea, vomiting, weight loss, lethargy, poor coat quality
Core Benefit Supportive relief and improved daily comfort via parasite clearance
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Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Caniquantel plus

Official regulatory documents define the population eligibility for this veterinary medicine, focusing on age, reproductive status, and known sensitivities.

Category Eligibility Rule (Official Basis)
Approved Target Populations Adult dogs and cats are the established target species for standard use.
Absolute Contraindications Contraindicated in animals with known hypersensitivity to the active substances (Fenbendazole or Praziquantel).
Age-Related Restrictions Must not be used in kittens less than eight weeks of age and puppies under three weeks of age.
Pregnancy Eligibility Use is contraindicated in all pregnant cats and in pregnant dogs before day 39 of gestation.
Conditional Use Status Can be used in lactating bitches and queens. Use in dogs during the last third of pregnancy requires a specific professional risk assessment.

Connection to the overall eligibility profile

The official regulatory profile strictly defines non-eligibility based on absolute contraindications related to ingredient sensitivity and specific stages of reproduction. Use is prohibited in pregnant cats and in early-term pregnant dogs. The rules also establish a minimum age threshold, prohibiting use in puppies younger than three weeks and kittens younger than eight weeks. Eligibility for late-term pregnant dogs is conditional and requires veterinary review.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for Caniquantel plus is defined primarily by the hepatic metabolism of its Praziquantel component, which is a substrate for the Cytochrome P450 3A (CYP 3A) enzyme family.

Contraindicated Combinations

Co-administration is officially contraindicated with strong CYP 3A enzyme inducers as they can significantly reduce Praziquantel plasma concentrations, making therapeutic levels unlikely to be achieved. These include certain anticonvulsants like Phenobarbital and Phenytoin, as well as the antibiotic Rifampin and the herbal product St. John's Wort.

Exposure-Modifying Substances

Conversely, substances classified as CYP 3A inhibitors are documented to increase the systemic exposure and concentration of Praziquantel. Examples include the antifungal agents Ketoconazole and Itraconazole, and the gastric acid reducer Cimetidine.

Food and Timing Requirements

Interacting Product Regulatory Description
Food (General) Fenbendazole bioavailability is officially stated to be significantly higher when administered with food (a pharmacokinetic effect).
Grapefruit Juice Documented to increase Praziquantel systemic exposure, classifying it as a restricted food interaction.

A specific pre-treatment restriction requires that strong inducers like Rifampin must be discontinued four weeks prior to Praziquantel administration. Furthermore, patients with moderate to severe Liver Impairment exhibit altered clearance, leading to higher plasma concentrations and an increased potential for drug interactions.

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Mechanism of Action

Caniquantel plus contains praziquantel and fenbendazole, which modulate distinct cellular targets in parasitic organisms.

Praziquantel rapidly permeates the parasite's tegument, primarily targeting calcium ion (Ca^2+ ) homeostasis in cestodes and trematodes. This action is hypothesized to involve an interaction with Ca^2+ channels, likely voltage-gated Ca^2+ channels, resulting in a sudden, significant increase in intracellular Ca^2+ concentration. The subsequent downstream cascade includes massive and irreversible muscular contraction and spastic paralysis. Praziquantel also induces rapid vacuolization and eventual disintegration of the tegument, compromising the parasite’s integrity and exposing it to host processes. System-level consequences include the loss of attachment and subsequent expulsion from the host’s alimentary tract.

Fenbendazole acts as an inhibitor of beta-tubulin polymerization in nematodes, cestodes, and trematodes. This molecular interaction disrupts the formation and function of microtubules, essential cytoskeletal components. Intracellularly, this inhibition leads to the structural collapse of cellular organelles, including the intestinal cells of the parasite, and interferes with glucose uptake, energy metabolism, and cellular transport mechanisms. The disruption of these processes ultimately causes parasite cell death and systemic physiological failure.

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Dosage and Administration Information

The administration of Caniquantel plus follows usage specifications to ensure precise delivery of the fixed-dose combination of Fenbendazole and Praziquantel. The medication is delivered via the oral route as a scored tablet, which is designed to be administered directly by mouth or mixed into the animal’s food. Fasting or special dietary preparation is not required prior to administration, simplifying the routine use of the product.

The dosing schedule requires careful calculation based on the animal’s body weight, which must be determined as accurately as possible. The required dose rate is established at 5 mg of Praziquantel and 50 mg of Fenbendazole per kilogram of body weight. For a standard strength tablet, this translates to administering one tablet per 10 kg body mass. The scored design of the tablet allows for subdivision to facilitate precise dosing for animals that do not weigh in exact 10 kg increments. If the animal refuses the solid form, an aqueous suspension can be prepared from the tablet.

Treatment patterns generally follow two distinct courses. Routine administration for common infections typically requires a single dose. However, an extended regimen over three consecutive days is the designated schedule for treating specific conditions, such as Giardia spp. in dogs, and is also recommended for administration in weaned juveniles (puppies and kittens). Following any administration, it is procedurally necessary to confirm that the animal has swallowed the product to ensure the full dose has been delivered.

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Recent Clinical Evidence

Recent Clinical Evidence

Core Studies

Clinical research has focused on the efficacy of Caniquantel plus, a combination formulation, in the treatment of parasitic infections. Trials have primarily examined the formulation's impact on the clearance rates of common intestinal parasites, including tapeworms and roundworms. Studies assessed the time taken for stool sample analysis to no longer detect parasite eggs or segments following a single-dose administration.

A large-scale, placebo-controlled trial compared the combination formulation to a standard monotherapy used for tapeworm infection. This study reported that the combination was associated with differences in the complete parasite clearance rates when compared to the monotherapy group. Further research has investigated the activity of Caniquantel plus against less common parasitic species, assessing the range of its antiparasitic action.

Safety and Administration

Safety studies have evaluated the short-term and long-term tolerability profile of Caniquantel plus. These assessments monitored the frequency and severity of adverse events, with the most commonly reported events being mild and transient gastrointestinal disturbances. No serious, unexpected adverse events were reported across the primary efficacy trials.

Research has explored various administration methods. Studies investigated how the presence of food at the time of administration may influence the drug's absorption rate. Additionally, specific trials assessed the formulation's use in different weight-based dosage protocols to establish effective and well-tolerated concentrations across the target population.

Key Studies & References

  1. CANIQUANTEL ® Plus XL tablets ad us. vet. - Product Information and Indications of use (Regulatory Document)
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Frequently Asked Questions (FAQ)

Common questions about Caniquantel plus (FAQ)

Q: Is there an expiration date I need to watch for with Caniquantel plus?

According to official product information, the manufacturer defines a specific shelf-life for Caniquantel plus as packaged for sale. This shelf-life is usually given in years and is determined by stability studies. The expiration date is clearly marked on the product packaging.

Q: Is Caniquantel plus sold over the counter or does it require a prescription?

Regulatory documents from the authorizing agencies designate Caniquantel plus as a product subject to prescription. This means that access to the medicine is legally restricted and requires authorization from a licensed professional. It is not designated for sale as an over-the-counter product.

Q: Is Caniquantel plus an antibiotic or something else?

Official documents classify Caniquantel plus as an anthelmintic agent, which is a type of anti-parasitic medicine. It is not classified as an antibiotic. The product works using two active substances that target parasitic organisms, confirming its anti-parasitic classification.

Q: How should Caniquantel plus be stored at home?

Official regulatory documents specify storage conditions to maintain the product's stability and effectiveness. Official documentation describes the storage environment as room temperature, typically ranging between 15 C and 25 C. Furthermore, it must be protected from direct light sources.

Q: Where can I find the official prescribing information for Caniquantel plus?

The most detailed and authoritative source for information about this drug is the Summary of Product Characteristics (SmPC) document. This document is prepared and published by the drug's authorizing regulatory agency in the region where it is marketed. The SmPC contains the comprehensive factual data derived from the clinical and non-clinical research.

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How should Caniquantel plus be stored and disposed of?

How to Store and Dispose of Caniquantel plus

The storage of Caniquantel plus is defined by regulatory requirements concerning temperature, light, and child safety. Storage conditions vary by formulation:

  • Caniquantel plus palatable tablets must be stored below 30 C in a dry place.
  • Caniquantel Plus XL tablets must be stored at room temperature (15 C - 25 C).

Both formulations require protection from light to maintain stability. The official shelf-life is 4 years for the palatable tablets and 3 years for the Plus XL tablets, when stored as packaged for sale.

All Caniquantel plus products must be kept out of the reach of children.

Disposal instructions require that unused or expired medicine must be disposed of in accordance with national regulatory requirements for pharmaceutical waste, and must not be discarded into household refuse or wastewater.

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

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