Fenbendazole 222 Mg

Last Updated on 10/31/2026 ✔ Medically Reviewed by Dr. Arjun Srivastav

Fenbendazole 222 mg is a veterinary antiparasitic product in the benzimidazole carbamate group of anthelmintics. The 222 mg strength refers to the amount of fenbendazole active ingredient in each unit. This figure is central to identifying the correct formulation.

Fenbendazole is a long established ingredient used in veterinary medicine to target susceptible parasitic worms in animals. This page covers:

Fenbendazole 222 Mg at a Glance

The following table sets out the product specification. Where details are specific to the product listed on AustraliaRxMeds, they should be confirmed against the product label and registration documentation.

What Is Fenbendazole 222 Mg?

Active ingredient and drug classification

Fenbendazole is the active ingredient in this product. It belongs to the benzimidazole carbamate class of anthelmintic drugs. This group is used in veterinary medicine for activity against certain parasitic worms.

Fenbendazole belongs to a wider group of antiparasitic compounds. A general overview of fenbendazole explains its veterinary background, pharmacological properties and the current limitations of human-use evidence.

Key details:

• Chemical name: methyl 5 (phenylthio) 2 benzimidazole carbamate
• CAS Registry Number: 43210 67 9
• Drug class: benzimidazole carbamate anthelmintic

As a benzimidazole, it sits within a broader family of antiparasitic agents that share a related mode of action.

Strength and dosage form

The 222 mg figure denotes the strength of the active ingredient in each unit. In well documented fenbendazole formulations, a 222 mg per gram concentration corresponds to a 22.2 per cent granule preparation.

The exact dosage form and unit presentation of the Fenbendazole 222 mg product stocked on AustraliaRxMeds should be confirmed from the product packaging before use. Granule, tablet and other oral presentations can exist under the same strength description.

Product composition and manufacturer

Fenbendazole is the active constituent. Registered veterinary formulations typically contain excipients such as:

• Lactose
• Maize starch
• Povidone

The specific manufacturer, excipient list and batch release details for the Fenbendazole 222 mg product listed on AustraliaRxMeds require verification against the product label. These details vary between registered formulations and should not be assumed.

What Is Fenbendazole 222 Mg Used For?

Established veterinary applications

Fenbendazole is used in veterinary medicine as an anthelmintic. Registered veterinary products containing fenbendazole are indicated for the control of certain internal parasites in target animal species.

The approved indications are defined by the manufacturer and its product documentation. These documented indications are specific to the animal species and parasites listed on the relevant product label.

Susceptible parasites and animal species

Registered fenbendazole products have documented activity against a range of gastrointestinal parasites in animals. These include:

• Roundworms (ascarids)
• Hookworms
• Whipworms
• Certain tapeworms

Species such as dogs are listed on approved product labels. Other approved formulations list additional target species and parasite infections.

The parasites and animal species covered by any particular Fenbendazole 222 mg product are those stated on its own label and registration documentation. They should not be inferred from other products.

Why the intended use depends on the product label

Each registered fenbendazole product carries its own approved indications, target species and directions for use. Formulations, strengths and registered uses differ between products.

The intended use of the Fenbendazole 222 mg product listed here can only be determined from its own product label and the manufacturer documentation. Assuming that directions or indications from a different fenbendazole product apply would be inaccurate.

How Does Fenbendazole 222 Mg Work?

Its interaction with parasite beta tubulin

Fenbendazole exerts its anthelmintic effect by binding to beta tubulin in susceptible parasites. Tubulin is the protein subunit that forms microtubules, which are the structural and transport filaments within cells.

When fenbendazole binds to parasitic beta tubulin, it interferes with the normal assembly of these microtubules. Benzimidazole anthelmintics are understood to bind selectively to parasite beta tubulin. This selectivity underpins their activity against susceptible worms.

How microtubule disruption affects susceptible parasites

By binding to free tubulin, fenbendazole inhibits the polymerisation of tubulin into microtubules. Depolymerisation continues at the other end of the structure. This destabilises the microtubule network that parasites rely on for nutrient uptake and intracellular transport.

The resulting disruption to glucose uptake and energy metabolism impairs the ability of the parasite to maintain essential cellular functions. This ultimately leads to its elimination.

What Are the Benefits of Fenbendazole 222 Mg?

A defined strength for product identification

The 222 mg strength provides a clear basis for identifying this particular fenbendazole formulation. A defined active ingredient strength helps distinguish it from other fenbendazole products that may carry different concentrations or presentations. It allows the product to be correctly matched to the information on its label.

Established veterinary antiparasitic role

Fenbendazole has a long established role in veterinary medicine as an anthelmintic for use in animals. Its place within the benzimidazole carbamate group is well documented in veterinary pharmacology. Registered products have defined indications supported by their product labels. This veterinary context is distinct from any human use.

Activity against susceptible parasitic worms

Within its established veterinary role, fenbendazole is active against susceptible parasitic worms in the target animal species listed on approved product labels. The specific parasites affected depend on the registered indications for the product in question. These are set out in the manufacturer documentation.

Fenbendazole 222 Mg may interact with certain medicines or treatments. Before using this medicine, it is important to inform your doctor about any ongoing medicines, supplements, or other anti-worm products.

Is Fenbendazole Approved for Human Use in Australia?

Difference between veterinary and human use

Fenbendazole is a veterinary anthelmintic. Veterinary products are evaluated and registered for use in animals. Human medicines are assessed separately for safety, quality and efficacy in people.

Discussions about fenbendazole for human parasitic infections should be considered separately from its established veterinary applications, as animal-use evidence does not establish human safety or effectiveness.

The regulatory pathway for a veterinary product does not establish that the same product is suitable or approved for human use.

What Australian Schedule 4 and Schedule 5 classifications mean

In Australia, substances are classified under the Poisons Standard into schedules that reflect the level of control over their supply.

• Schedule 4: Prescription Only Medicines and Prescription Animal Remedies. Supply is restricted to use under professional authorisation.
• Schedule 5: Caution substances. Available to the public but require care in handling and use.

Fenbendazole appears in the Poisons Standard. The schedule that applies to a particular product depends on its formulation and registered use.

Scheduling versus ARTG product approval

Scheduling classifies a substance according to the controls on its supply. It is separate from product approval. Registration on the Australian Register of Therapeutic Goods (ARTG) is the process by which a specific product is assessed and entered onto the register for supply in Australia.

Important distinctions:

• A substance being scheduled does not mean a particular product is ARTG registered
• ARTG registration of one product does not extend to other products containing the same ingredient

The ARTG registration status of the specific Fenbendazole 222 mg product listed on AustraliaRxMeds should be confirmed through the relevant regulatory database rather than assumed.

What Is Known About Fenbendazole and Human Safety?

Limitations of available human evidence

Fenbendazole has not been approved for human use. Pharmacokinetic data for the compound in people is limited. No clinical trials have established fenbendazole as a safe or effective treatment for any human condition.

Information drawn from in vitro and animal studies cannot be used to confirm human safety or effectiveness.

Why animal use information cannot establish human safety

Veterinary safety and dosing information is developed for animal species and target parasites. It does not account for:

• Human pharmacokinetics
• Potential interactions
• The risks of human exposure

For these reasons, animal use data and veterinary product directions cannot be relied upon to establish safety for people.

Why experimental cancer research is not proof of treatment effectiveness

Some laboratory studies have examined fenbendazole in cancer cell lines and animal models. Isolated case reports of self administration have appeared in the literature. However, these are not proof that fenbendazole treats cancer in people.

Key points:

• Laboratory findings, animal studies and anecdotal reports are not proof of human treatment effectiveness. The available findings and their limitations are discussed in our analysis of fenbendazole and cancer research, including why experimental results cannot establish effectiveness in people.
• Treatments that show activity in cell culture or animals do not always translate to human efficacy
• Controlled clinical trials would be required to establish any therapeutic role
• A Swedish clinical trial investigating related benzimidazole anthelmintics in cancer patients was terminated early due to lack of effect

Fenbendazole is not an approved cancer treatment.

Fenbendazole 222 Mg Side Effects

Like any medication, Fenbendazole 222 Mg may cause side effects in some cases. The side effects can depend on factors such as the individual response, dosage, and duration of use.

Published reports have raised concerns about possible liver-related injury following unapproved use. The available information and its limitations are discussed in our article on fenbendazole side effects in humans.

Safety Information and Precautions

Follow the product intended use instructions

Use the product only for the veterinary purpose and target species stated on its label. Follow the directions provided by the manufacturer. The approved indications and directions for use are those documented for the specific product.

Avoid assuming veterinary directions apply to humans

Veterinary directions, dosage schedules and safety information are developed for animals. They do not apply to humans. Fenbendazole is not an approved human medicine. Do not use veterinary product information as a basis for human use.

Accidental exposure and when to seek advice

If accidental exposure occurs:

• Follow the first aid guidance on the product label
• Seek advice from a healthcare professional or a poisons information centre
• Keep the product packaging available so that relevant details can be provided

How Should Fenbendazole 222 Mg Be Stored?

Storage conditions should be followed as stated on the manufacturer product label. Registered fenbendazole products carry specific storage instructions, and these should be observed rather than assumed. Confirm the storage requirements for the specific Fenbendazole 222 mg product from its own packaging.

If you want to purchase Fenbendazole 222 Mg online, be sure that the pharmacy will provide genuine medicines with safe purchase and a detailed product description. At AustraliaRXMeds, you can find a variety of antiparasitics, place your order through a secure checkout, and have it delivered in discreet packaging across Australia. However, before ordering, you should ensure that the product is suitable for you.