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AVM-GSL Over the Counter Companion Animal

Johnsons One Dose Wormer 230/20 Film-Coated Tablets for Cats and Kittens

Active ingredients: Praziquantel, Pyrantel Embonate

Form

Tablet

Species

Cats

Manufacturer

C&H Generics Ltd

VMD MA No.

40162/4007

What it's used for

For the treatment of mixed infections caused by the following gastrointestinal roundworms and tapeworms: Roundworms: Toxocara cati, Toxascaris leonina, Tap...

Full indications, dosage and side effects ↓
View official SPC (PDF)

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  1. 1

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    They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.

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    The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.

Clinical information

Johnsons One Dose Wormer 230/20 Film-Coated Tablets for Cats and Kittens — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.

For the treatment of mixed infections caused by the following gastrointestinal
roundworms and tapeworms:
Roundworms: Toxocara cati, Toxascaris leonina,
Tapeworms: Dipylidium caninum, Taenia taeniaeformis, Echinococcus
multilocularis.
To ensure administration of a correct dose, body weight should be determined as
accurately as possible.

Revised: September 2021
AN: 01707/2019
Dosage
The recommended dose is: 20 mg/kg pyrantel (57.5 mg/kg pyrantel embonate) and
5 mg/kg praziquantel. This is equivalent to 1 tablet per 4 kg bodyweight.
Body weighttablets1.0 - 2.0 kg½ Greater than 2.0 up to 4.0 kg1Greater than 4.0 up to 6.0 kg1 ½ Greater than 6.0 kg2
Administration and duration of treatment
Single oral administration. The tablet should be given directly to the cat, but if
necessary can be disguised in food.
In ascarid infestation, especially in kittens, complete elimination cannot be expected,
so a risk of infection for humans can persist. Repeat treatments should, therefore, be
carried out with a suitable roundworm product at 14 day intervals until 2-3 weeks
after weaning.
If signs of disease persist or appear, consult a veterinary surgeon.
Do not use simultaneously with piperazine compounds.
Do not use simultaneously with other deworming products without veterinary advice.
Do not use in kittens less than 6 weeks of age.
Do not use in animals with known hypersensitivity to the active substances or to any
of the excipients.
Do not use during pregnancy.
Mild and short-lived digestive tract disorders such as excessive salivation and/or
vomiting and mild and short-lived disorders of the nervous system such as loss of
balance may occur in extremely rare cases.
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).
Fleas serve as intermediate hosts for one common type of tapeworm – Dipylidium
caninum. Tapeworm infestation is certain to reoccur unless control of intermediate
hosts such as fleas, mice, etc. is undertaken.
Parasitic resistance to a certain class of anthelmintics can occur after frequent and

Revised: September 2021
AN: 01707/2019
repeated use of an anthelmintic from this class.

Special precautions for use in animals
Not intended for use in cats weighing less than 1 kg bodyweight.
Special precautions to be taken by the person administering the veterinary
medicinal product to animals
In the interests of good hygiene, persons administering the tablets directly to the cat,
or by adding them to the cat’s food, should wash their hands afterwards.
In case of accidental ingestion, seek medical advice and show the package leaflet or
carton to the physician.
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 (e. g. experts or institutes of parasitology). If the
cat has visited areas where Echinococcus spp. are prevalent, a veterinarian should
be consulted.’
Do not use simultaneously with piperazine compounds.
This veterinary medicinal product does not require any special storage conditions.
Unused halved tablets should be discarded.
Do not remove tablets from the immediate packaging until required for use.
Not applicable.
5.

This information is sourced from the official Summary of Product Characteristics (SPC) published by the Veterinary Medicines Directorate (VMD). It is provided for informational purposes only and does not replace professional veterinary advice. Always consult your vet before administering any medication.

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