Johnson's Easy Spot-On Solution Wormer for Cats & Kittens 20mg

Composition

For the full list of excipients, see section 6.1

6.1 List of excipients

Butylated hydroxytoluene

N-methylpyrrolidone

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Pharmaceutical form

Spot-on solution.

Clear colourless to slightly reddish liquid.

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Pharmacological properties

The Active Ingredient

Praziquantel, the active ingredient of the product is a pyrazinoisoquinoline derivative used widely as an anthelmintic for both human and veterinary medicine. The chemical name for this substance is 2-cyclohexyl- carbonyl[1,2,3,6,7,11b] hexahydro-4H-pyrazino-[2,1-a]isoquinolin-4-one1.

ATCVet Code: QP52AA01

5.1 Pharmacodynamics

Praziquantel is effective against all stages of development of intestinal tapeworms. The substance is very rapidly absorbed and distributed throughout the parasite. Both in vivo and in vitro studies have shown that praziquantel causes severe damage to the parasite integument, resulting in contraction and paralysis. There is an almost instantaneous tetanic contraction of the parasite musculature and a rapid vacuolisation of the syncytial tegument. This rapid contraction has been explained by changes in divalent cation fluxes, particularly calcium.

5.2 Pharmacokinetics

Praziquantel is absorbed very rapidly and almost completely in the stomach and small intestine. Studies of the behaviour following oral administration have been conducted in rats, dogs, monkeys, sheep and humans.

Depending on species, maximum serum levels are reached within 0.3 to 2 hours. The chemical is evenly distributed to all organs. The elimination half-

1 CAS number 55268-74-1

lives of 14C-praziquantel and its metabolites are between 2 and 3 hours in rats, dogs, monkeys and sheep.

Praziquantel is rapidly metabolised in the liver in both humans and animals with the 4-hydroxycyclohexyl derivative as the main metabolite. Praziquantel is completely eliminated from the body within 48 hours; irreversible binding to body constituents has not been observed. Elimination is in the form of metabolites with virtually no parent compound excreted. Between 40% and 71% of the substance is eliminated in the urine and 13%-30% in the faeces.

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Target species

Cats.

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Indications

For the treatment of tapeworms of cats. The product is effective against mature and immature forms of Dipylidium caninum and Taenia species. The product is also effective against Echinococcus multilocularis.

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Dosage

Dosage and Treatment Schedule

The minimum dose rate is 8 mg/kg bodyweight, which equates to 1 tube per 2.5 kg bodyweight.

Underdosing could result in ineffective use and may favour resistance development.

Method of Administration

Remove one tube from the package. Hold tube in an upright position, twist and pull off cap. Use reversed cap to twist and remove seal from tube.

Part the hair on the cat's neck at the base of the skull until the skin is visible.

Place the tip of the tube on the skin and squeeze firmly several times to empty the contents directly onto the skin. Application at the base of the skull will minimise the opportunity for the cat to lick the product.

To minimise the possibility of run-off after application of more than one pipette, it is advised that the applications should be performed slowly to allow absorption and that it may be advisable to allow the contents of the previous pipette to be absorbed before applying another.

Tapeworm infestation is certain to re-occur unless control of intermediate hosts such as fleas, mice etc. is undertaken.

Flea control: flea infestations can be controlled by the regular use of effective flea control remedies.

Mice control: if cats roam and hunt, contact with, and consumption of, mice and subsequent re-infestation with Taenia taeniaeformis is impossible to prevent.

It is recommended to re-apply the product when signs of tapeworm infestation re-appear or at monthly intervals.

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Contraindications

Do not use on cats weighing less than 1 kg bodyweight.

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Adverse reactions

Cats and kittens Occasionally a transient local reaction, such as scurf, mild exudation, alopecia (hair loss), scab, erythema (reddening) and pruritus (itching) may be observed at the application site following treatment.

The product is bitter tasting and salivation may occasionally occur if the cat licks the application site immediately after treatment. This is not a sign of intoxication and disappears after a short time without treatment.

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Warnings

i) Special precautions for use in animals

Care should be taken to avoid the contents of the tube coming into contact with the eyes or mouth of the recipient animal.

For external use only.

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

Laboratory studies in rabbits and rats with the excipient N-methyl pyrrolidone have shown evidence of foetotoxic effects. The veterinary medicinal product should not be administered by pregnant women and women suspected of being pregnant. Personal protective equipment consisting of gloves should be worn when handling the veterinary medicinal product by women of childbearing age.

Do not eat, drink or smoke during application.

Wash hands thoroughly after use.

This product can be an irritant to the skin and eyes.

Care should be taken to prevent contact of the solution with the skin, eyes or mouth.

If contact with the skin occurs, wash off any skin contamination with soap and water immediately.

If accidental contact occurs (splashes) with the eyes, flush the affected eyes thoroughly with clean fresh water.

In the event of skin, eye or mouth contact, seek medical advice if irritation persists and show the Doctor this package.

Do not stroke or groom animals until area of application is dry (typically around 1 hour after application).

Store away from food, drink or animal feeding stuffs.

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Use during pregnancy, lactation or lay

The safety of the veterinary medicinal product has not been established in cats during pregnancy lactation or in animals intended for breeding. Laboratory studies in rabbits and rats with the excipient N-methyl pyrrolidone have shown evidence of foetotoxic effects. Use only according to the benefit- risk assessment by the responsible veterinarian.

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Interactions

No incompatibility has been observed between this product at the recommended dose and a range of common veterinary treatments.

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Overdose

Overdosing can lead to slight skin reactions which disappear without treatment within a few days.

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Special warnings

Do not allow recently treated animals to groom each other.

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Withdrawal period

Not applicable as the product is not indicated for the treatment of food producing animals.

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Incompatibilities

None known.

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Immediate packaging

Packaging style: Blister pack containing 2 or 4 unit dose tubes

Container White opaque polypropylene tube with an integral material: nozzle and rupturable membrane White polypropylene cap

Contents: 2 x 0.5 ml or 4 x 0.5 ml tubes (20 mg praziquantel) Not all pack sizes may be marketed.

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Storage

Store away from food, drink and animal feeding stuffs.

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Shelf life

Shelf-life of the veterinary medicinal product as packaged for sale: 30 months.

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Disposal of unused product

product or waste materials derived from the use of such products, if appropriate

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

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Additional information

Vm 08007/5062

9 DATE OF FIRST AUTHORISATION

30 November 2004

10 DATE OF REVISION OF THE TEXT

December 2025

Gavin Hall Approved: 12 December 2025

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Registration holder

Vetoquinol UK Limited

Steadings Barn

Pury Hill Business Park, Nr. Alderton

Towcester

Northamptonshire

NN12 7LS

United Kingdom

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