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POM-V Prescription Required Companion Animal

Wormit Film-coated Tablets for Cats 16/40 mg

Active ingredients: Milbemycin Oxime (A3 and A4), Praziquantel

Form

Tablet

Species

Cats

Manufacturer

C&H Generics Ltd

VMD MA No.

40162/3009

What it's used for

The veterinary medicinal product is only indicated when use against cestodes and nematodes is indicated at the same time.

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

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  1. 1

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  2. 2

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

Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Wormit Film-coated Tablets for Cats 16/40 mg — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.

The veterinary medicinal product is only indicated when use against cestodes
and nematodes is indicated at the same time.
Minimum recommended dose rate: 2 mg of milbemycin oxime and 5 mg of
praziquantel per kg are given once orally.
The product should be administered with or after some food. Doing so ensures
optimum protection against heartworm disease.
As per good veterinary practice, animals should be weighed to ensure accurate
dosing. Underdosing could result in ineffective use and may favour resistance
development.
Depending on the bodyweight of the cat, the practical dosing is as follows:
WeightNumber of Tablets1 – 2kg¼ tablet> 2 - 4 kg½ tablet> 4 – 8 kg1 tablet> 8 - 12 kg1½ tablets
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 regular
prevention of heartworm disease the use of a monosubstance is preferred.
The need for and frequency of re-treatment should be based on professional
advice and should take into account the local epidemiological situation and the
animal’s lifestyle.
Do not use in cats weighing less than 1 kg.
Do not use in cases of hypersensitivity to the active substances or to any of
excipients.
See also section 3.5 “Special precautions for use”.
Cats:
Very rare
(<1 animal / 10,000 animals
treated, including isolated reports):
Digestive tract disorders (such as
Diarrhoea, Emesis)
Hypersensitivity reaction
Neurological disorders (such as Ataxia
and Muscle tremor)
Systemic disorders (such as Lethargy)
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 its local
representative or the national competent authority via the national reporting
system. See the package leaflet for respective contact details.
In order to develop an effective worm control programme, local epidemiological

information and the risk of exposure of the cat should be taken into account.
The possibility that other animals in the same household can be a source of re-
infection should be considered, and these should be treated as necessary with
an appropriate veterinary medicinal product.
In the absence of risk of co-infection with nematodes and cestodes, a narrow
spectrum product should be used.
When infection with the cestode

treatment against intermediate hosts, such as fleas and lice, should be
discussed with

a veterinarian to prevent re-infection.

Special precautions for safe use in the target species
As per good veterinary practice, animals should be weighed to ensure accurate

dosing.
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.
Special precautions to be taken by the person administering the veterinary
medicinal product to animals
Accidental ingestion of the product may be harmful.
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

physician.
Dispose of unused tablet halves.
Wash hands after use.
Special precautions for the protection of the environment
See section 5.5.
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 people need
to be obtained from the relevant competent authority.
The concurrent use of the product with selamectin is well tolerated. No
interactions were observed when the recommended dose of the macrocyclic
lactone selamectin was administered during treatment with the product at the
recommended dose.
Although not recommended, the concomitant use of the product with a spot-on
containing moxidectin and imidacloprid at recommended dose rates following a
single application was well tolerated in one laboratory study in 10 kittens.
The safety and efficacy of the concurrent use have not been investigated in field
studies.
In the absence of further studies, caution should be taken in the case of
concurrent use of the product with any other macrocyclic lactone. Also, no such
studies have been performed with reproducing animals.
Keep the blister in the outer carton in order to protect from light.
This veterinary medicinal product does not require any special temperature
storage conditions.
Not applicable.

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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