WORMclear Praziquantel 20 mg Spot-on Solution for Cats

Composition

1 pipette of 0.5 ml contains:

Active substances:

Praziquantel 20.0 mg

Excipients:

Clear, colourless to slightly reddish liquid spot-on solution.

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Pharmacological properties

4.1 ATCvet code: QP52AA01

4.2 Pharmacodynamics

Praziquantel, the active ingredient, 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.

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.

4.3 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-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 veterinary medicinal 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:

To ensure a correct dosage, body weight should be determined as accurately as possible to avoid underdosing.

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 veterinary medicinal 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 veterinary medicinal product when signs of tapeworm infestation re-appear or at monthly intervals

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Contraindications

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

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

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Adverse reactions

Cats

Very rare (<1 animal / 10,000 animals treated, including isolated reports): Application site reaction1 (e.g. dandruff1, exudation1,2, hair loss1, reddening1, itching1, scab1) Hypersalivation3

1 Transient

2 Mild

3 Due to the bitter taste of the product 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.

Reporting adverse events is important. It allows continuous safety monitoring of a veterinary medicinal product. Reports should be sent, preferably via a veterinarian, to either the marketing authorisation holder or the national competent authority via the national reporting system. See the package leaflet for respective contact details.

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Warnings

Special precautions for safe use in the target species:

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

Do not use if your cat is sick or recovering from illness.

For external use only.

Special precautions to be taken by the person administering the veterinary 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.

This veterinary medicinal product can be irritant to the skin and eyes.

Care should be taken to prevent contact of the solution with the skin or eyes. In case of accidental spillage onto skin, wash off any skin contamination with soap and water immediately.

In case of accidental contact with the eyes, flush the affected eyes thoroughly with clean fresh water.

If skin or eye irritation persists, seek medical advice immediately and show the package leaflet or the label to the doctor.

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

Wash hands thoroughly after use.

Do not eat, drink or smoke during application.

Special precautions for the protection of the environment:

Not applicable.

Other precautions:

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

3.11 Special restrictions for use and special conditions for use, including restrictions on the use of antimicrobial and antiparasitic veterinary medicinal products in order to limit the risk of development of resistance

Not applicable.

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Use during pregnancy, lactation or lay

The safety of the veterinary medicinal product has not been established during pregnancy, lactation or in animals intended for breeding.

Pregnancy and lactation:

Laboratory studies in rabbits and rats with the excipient N-methyl pyrrolidone have shown evidence of foetotoxic effects.

Use only accordingly to the benefit-risk assessment by the responsible veterinarian.

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Interactions

None known.

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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.

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Incompatibilities

None known.

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Immediate packaging

White opaque polypropylene tube with an integral nozzle and rupturable membrane. White polypropylene cap.

Blister pack of 2 or 4 unit dose tubes each containing 0.5 ml solution

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Storage

Store away from food, drink and animal feeding stuffs.

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

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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

Medicines should not be disposed of via wastewater.

Use take-back schemes for the disposal of any unused veterinary medicinal product or waste materials derived thereof in accordance with local requirements and with any national collection systems applicable to the veterinary medicinal product concerned.

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Additional information

Vm 08007/5029

8 DATE OF FIRST AUTHORISATION

25 September 2014

9 DATE OF THE LAST REVISION OF THE SUMMARY OF THE PRODUCT CHARACTERISTICS

May 2026

10 CLASSIFICATION OF VETERINARY MEDICINAL PRODUCT

Veterinary medicinal product not subject to prescription.

Find more product information by searching for the ‘Product Information Database’ on www.gov.uk.

Approved 16 May 2026

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Registration holder

Vetoquinol UK Limited

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