VetUK Cat Wormer 4 mg/10 mg Film-coated Tablets for Small Cats and Kittens

Milbemycin Oxime (A3 and A4), Praziquantel

Last verified

Veterinary medicinal product: film-coated tablet. Distribution category: POM-V (Veterinary Medicines Regulations 2013, Schedule 3). Active substance: Milbemycin Oxime (A3 and A4), Praziquantel.1

In short: questions and answers

Does VetUK Cat Wormer 4 mg/10 mg Film-coated Tablets for Small Cats and Kittens need a prescription?
Prescription only. As stated in the registration decision.1
Which animals is VetUK Cat Wormer 4 mg/10 mg Film-coated Tablets for Small Cats and Kittens for?
Cats.1
What is the active substance in VetUK Cat Wormer 4 mg/10 mg Film-coated Tablets for Small Cats and Kittens?
Milbemycin Oxime (A3 and A4), Praziquantel. ATCvet code: QP54AB51.13
What is the withdrawal period of VetUK Cat Wormer 4 mg/10 mg Film-coated Tablets for Small Cats and Kittens according to the leaflet?
No withdrawal period is set for this drug: it is not intended for food-producing animals.3
Dispensing
Prescription only1

POM-V: Prescription Only Medicine - Veterinarian. Supplied only on a prescription written by a veterinary surgeon who has assessed the animal.12

Supplied only on a veterinarian's prescription. As stated in the registration decision.

Animal species
Cats1
Active substance
Milbemycin Oxime (A3 and A4), Praziquantel
ATCvet code
QP54AB513
Manufacturer
Marketing authorisation holder: Alfamed

Withdrawal period

No withdrawal period is set for this drug: it is not intended for food-producing animals.3

Summary of product characteristics

Composition

Each tablet contains:

Active substances:

Milbemycin oxime 4 mg

Praziquantel 10 mg

Excipients:

Iron oxide (E172) 0.3 mg

For the full list of excipients, see section 6.1.

6.1 List of excipients

Core:

Microcrystalline cellulose

Croscarmellose sodium

Magnesium stearate

Povidone

Silica hydrophobic colloidal

Coat:

Natural Poultry liver flavour

Hypromellose

Microcrystalline cellulose

Macrogol stearate

Iron oxide (E172)

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Pharmaceutical form

Film coated tablet.

Oval shaped, dark brown, meat flavoured tablets with a score on both sides.

The tablets can be divided into halves.

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Pharmacological properties

Pharmacotherapeutic group: Antiparasitic products, insecticides and repellents: endectocides; milbemycin, combinations

ATCvet code: QP54AB51 (Milbemycin combinations)

5.1 Pharmacodynamic properties

Milbemycin oxime belongs to the group of macrocyclic lactones, isolated from the fermentation of Streptomyces hygroscopicus var. aureolacrimosus. It is active against mites, against larval and adult stages of nematodes as well as against larvae of Dirofilaria immitis. The activity of milbemycin is related to its action on invertebrate neurotransmission: Milbemycin oxime, like avermectins and other milbemycins, increases nematode and insect membrane permeability to chloride ions via glutamate-gated chloride ion channels (related to vertebrate GABAA and glycine receptors). This leads to hyperpolarisation of the neuromuscular membrane and flaccid paralysis and death of the parasite.

Praziquantel is an acylated pyrazino-isoquinoline derivative. Praziquantel is active against cestodes and trematodes. It modifies the permeability for calcium (influx of Ca2+) in the membranes of the parasite inducing an imbalance in the membrane structures, leading to membrane depolarisation and almost instantaneous contraction of the musculature (tetany), rapid vacuolization of the syncytial tegument and subsequent tegumental disintegration (blebbing), resulting in easier expulsion from the gastrointestinal tract or death of the parasite.

5.2 Pharmacokinetic particulars

In the cat, praziquantel reaches peak plasma concentrations within 1-4 hours after oral administration.

The half life of elimination is around 3 hours.

In the dog, there is rapid hepatic biotransformation, principally to monohydroxylated derivatives.

The principal route of elimination in the dog is renal.

After oral administration in the cat, milbemycin oxime reaches peak plasma concentrations within 2-4 hours. The half life of elimination is around 32 to 48 hours. In the rat, metabolism appears to be complete although slow, since unchanged milbemycin oxime has not been found in urine or feces. Main metabolites in the rat are monohydroxylated derivatives, attributable to hepatic biotransformation. In addition to relatively high liver concentrations, there is some concentration in fat, reflecting its lipophilicity.

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Target species

Cats (small cats and kittens).

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Indications

In cats: treatment of mixed infections by immature and adult cestodes (tapeworms) and adult nematodes (roundworms) of the following species:

Cestodes:

Echinococcus multilocularis,

Dipylidium caninum,

Taenia spp.,

Nematodes:

Ancylostoma tubaeforme,

Toxocara cati

Prevention of heartworm disease (Dirofilaria immitis), if concomitant treatment against cestodes is indicated.

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Dosage

Oral use.

Animals should be weighed to ensure accurate dosing.

Minimum recommended dose rate: 2 mg of milbemycin oxime and 5 mg of praziquantel per kg are given once orally as a single dose.

The product should be administered with or after some food.

The product is a small size tablet.

To aid with administration, the product has been coated with a meat flavour.

The tablets can be divided into halves.

Depending on the bodyweight of the cat, the practical dosing is as follows:

WeightTablets
0.5 - 1 kg1/2 tablet
> 1 – 2 kg1 tablet

The product can be inserted into a programme for prevention of heartworm disease if at the same time treatment against tapeworms is indicated. The product has a duration of heartworm prevention of one month. For prevention of heartworm disease the use of a monosubstance is preferred.

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Contraindications

Do not use in kittens of less than 6 weeks of age and/or weighing less than 0.5 kg.

Do not use in cases of hypersensitivity to the active substances or to any of the excipients.

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Adverse reactions

In very rare occasions, especially in young cats, hypersensitivity reactions, systemic signs (such as lethargy), neurological signs (such as ataxia and muscle tremors) and/or gastrointestinal signs (such as emesis and diarrhoea) may be observed after administration of the veterinary medicinal product.

The frequency of adverse reactions is defined using the following convention:

- very common (more than 1 in 10 animals treated displaying adverse reaction(s))

- common (more than 1 but less than 10 animals in 100 animals treated)

- uncommon (more than 1 but less than 10 animals in 1,000 animals treated)

- rare (more than 1 but less than 10 animals in 10,000 animals treated)

- very rare (less than 1 animal in 10,000 animals treated, including isolated reports).

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Warnings

4.5 i Special precautions for use in animals

No studies have been performed with severely debilitated cats or individuals with seriously compromised kidney or liver function. The product is not recommended for such animals or only according to a benefit/risk assessment by the responsible veterinarian.

Studies have shown that treatment of dogs with a high number of circulating microfilariae can sometimes lead to the appearance of hypersensitivity reactions, such as pale mucous membranes, vomiting, trembling, laboured breathing or excessive salivation. These reactions are associated with the release of proteins from dead or dying microfilariae and are not a direct toxic effect of the product. In the absence of data on cats with microfilaraemia, its use should be according to a benefit risk assessment by the attending veterinarian.

As the tablets are flavoured, they should be stored in a safe place out of the reach of animals.

As per good veterinary practice, animals should be weighed to ensure accurate dosing. Ensure cats and kittens weighing between 0.5 kg and ≤2 kg receive the appropriate tablet strength (4 mg MBO/10 mg praziquantel) and the appropriate dose (1/2 or 1 tablet) for the corresponding weight band (1/2 tablet for cats weighing 0.5 to 1 kg ; 1 tablet for cats weighing >1 to 2 kg – 1 tablet).

4.5 ii Special precautions to be taken by the person administering the veterinary medicinal product to animals

Wash hands after use.

Part tablets should be returned to the open blister pack and stored in the carton.

In the event of accidental ingestion of the tablets, particularly by a child, seek medical advice immediately and show the package leaflet or the label to the doctor.

Do not handle this product in case of hypersensitivity to the active substances or to any of the excipients.

4.5 iii Other precautions

Echinococcosis represents a hazard for humans. As Echinococcosis is a notifiable disease to the World Organisation for Animal Health (OIE), specific guidelines on the treatment and follow-up, and on the safeguard of persons, need to be obtained from the relevant competent authority.

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Use during pregnancy, lactation or lay

In a study, this combination of active substances was demonstrated to be well tolerated in breeding queens, including during pregnancy and lactation. As a specific study with this product has not been performed, use during pregnancy and lactation only according to a benefit/risk assessment by the responsible veterinarian.

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Interactions

The concurrent use of the combination praziquantel/milbemycin oxime with selamectin is well tolerated. No interactions were observed when the recommended dose of the macrocyclic lactone selamectin was administered during treatment with the combination at the recommended dose. In the absence of further studies, caution should be taken in the case of concurrent use of the product and other macrocyclic lactones. Also no such studies have been performed with reproducing animals.

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Overdose

In a study conducted with the product administered at 1X, 3X and 5X the therapeutic dose, and for a duration which exceed the therapeutic indication, i.e. 3 times at 15 day-intervals, signs uncommonly reported at the recommended dose (see section 4.6) have been observed at 5-fold the therapeutic dose after the second and third treatments. These signs disappeared spontaneously within a day.

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Special warnings

It is recommended to treat all the animals living in the same household concomitantly.

In order to develop an effective worm control programme local epidemiological information and the living conditions of the cat should be taken into account and therefore it is recommended to seek professional advice.

Parasite resistance to any particular class of anthelmintic may develop following frequent, repeated use of an anthelmintic of that class.

When Dipylidium caninum infection is present, concomitant treatment against intermediate hosts, such as fleas and lice, should be considered to prevent re-infection.

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Withdrawal period

Not applicable.

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Incompatibilities

Not applicable.

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Immediate packaging

Aluminium/ Aluminium blister pack (Oriented polyamide/Aluminium/Polyvinyl chloride sealed to Aluminium film).

Available pack sizes:

1 box of 2 tablets containing 1 blister of 2 tablets

1 box of 4 tablets containing 2 blisters of 2 tablets.

Not all pack sizes may be marketed.

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Storage

This veterinary medicinal product does not require any special temperature storage conditions.

Half tablets should be stored in the original blister and be used for the next administration.

Keep the blister in the outer carton.

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Shelf life

Shelf life of the veterinary medicinal product as packaged for sale: 3 years.

Shelf life after first opening the immediate packaging: 6 months.

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Disposal of unused product

Any unused veterinary medicinal product or waste materials derived from such veterinary medicinal product should be disposed of in accordance with local requirements.

The product should not enter water courses as this may be dangerous for fish and other aquatic organisms.

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Additional information

Vm 17902/5019

9 DATE OF FIRST AUTHORISATION

16 June 2014

10 DATE OF REVISION OF THE TEXT

September 2025

Approved: 10 September 2025

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Registration holder

Alfamed

13ème Rue – L.I.D.

06517 Carros Cedex

France

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Regulations

Sources

  1. VMD Product Information Database: VetUK Cat Wormer 4 mg/10 mg Film-coated Tablets for Small Cats and Kittens, 17902/5019 UK Veterinary Medicines Directorate (OGL v3.0), checked 2026-10-04 archived copy from 2026-10-04
  2. The Veterinary Medicines Regulations 2013, Schedule 3 (categories of veterinary medicinal products) UK Government, legislation.gov.uk, checked 2026-10-04 archived copy from 2026-10-04
  3. Summary of Product Characteristics: VetUK Cat Wormer 4 mg/10 mg Film-coated Tablets for Small Cats and Kittens UK Veterinary Medicines Directorate, SPC of the marketing authorisation holder, checked 2026-10-04 archived copy from 2026-10-04

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