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POM-VPS Prescription Required

Topimec Plus 10/100 mg/ml Solution for Injection for Cattle

Active ingredients: Clorsulon, Ivermectin

Form

Injection

Species

Cattle

Manufacturer

Chanelle Pharmaceuticals Manufacturing Ltd

VMD MA No.

08749/5082

What it's used for

The product is indicated for the treatment of mixed infestation of adult liver fluke and gastro-intestinal roundworms, lungworms, eye worms, and/or mites a...

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

The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.

Paying less for Clorsulon + Ivermectin

  1. 1

    Ask your vet for a written prescription

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

  2. 2

    Fill it at a registered online retailer

    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

Topimec Plus 10/100 mg/ml Solution for Injection for Cattle — SPC Details

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

The product is indicated for the treatment of mixed infestation of adult liver fluke and
gastro-intestinal roundworms, lungworms, eye worms, and/or mites and lice of beef and
non-lactating dairy cattle.
Gastrointestinal roundworms (adult and fourth-stage larvae):
Ostertagia ostertagi
O. lyrata
Haemonchus placei
Trichostrongylus axei
T. colubriformis
Cooperia oncophora
C. punctata
C. pectinata
Bunostomum phlebotomum
Oesophagostomum radiatum
Strongyloides papillosus (adult)
Nematodirus spathiger
Nematodirus helvetianus (adult)
Trichuris spp

Revised: September 2025
AN: 01811/2025
Lungworms
Dictyocaulus viviparus
Liver fluke (adult):
Fasciola hepatica
Eye worms (adult):
Thelazia spp
Warbles (parasitic stages):
Hypoderma bovis
H. lineatum
Mange mites:
Psoroptes bovis
Sarcoptes scabiei var. bovis
Sucking lice:
Linognathus vituli
Haematopinus eurysternus
Solenopotes capillatus.
The product may also be used as an aid in the treatment of biting lice (Damalinia bovis)
and the mange mite Chorioptes bovis, but complete elimination may not occur.
Persistent activity
The product given at the recommended dosage of 1 ml/50kg body weight controls re-
infection with Trichostrongylus axei
14 days after treatment, Oesophagostomum radiatum
up to 21 days after treatment and
treatment.
Do not use intramuscularly or intravenously.
The product is a low volume product authorised for use in cattle. Do not use in other
species as severe adverse reactions, including fatalities in dogs, may occur (especially
Collies, Old English Sheepdogs and related breeds or crosses). Do not use in animals
with known hypersensitivity to the active substances or to any of the excipients.
Target species: Cattle
Very rare
(<1 animal / 10,000 animals
treated, including isolated
reports):
*Injection site swelling.
*Transient injection site pain.
*These reactions disappeared 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 its local representative or the national
competent authority via the national reporting system. See also the last section of the
package leaflet for respective contact details.

Revised: September 2025
AN: 01811/2025
Care should be taken to avoid the following practices because they increase the risk of
development of resistance and could ultimately result in ineffective therapy:
•
extended period of time.
•
misadministration of the product, or lack of calibration of the dosing device (if any).
Suspected clinical cases of resistance to anthelmintics should be further investigated using
appropriate tests (e.g. Faecal Egg Count Reduction Test). Where the results of the test(s)

Revised: September 2025
AN: 01811/2025
strongly suggest resistance to a particular anthelmintic, an anthelmintic belonging to
another pharmacological class and having a different mode of action should be used.
Resistance to Ivermectin has been reported in Ostertagia ostertagi and Cooperia species
in cattle within the EU. Therefore, the use of this product should be based on local
(regional, farm) epidemiological information about susceptibility of these helminth species
and recommendations on how to limit further selection for resistance to anthelmintics.

i) Special precautions for use in animals
This product does not contain any antimicrobial preservative. Swab septum before
removing each dose.
To avoid secondary reactions due to the death of Hypoderma larvae in the oesophagus or
the spine, it is recommended to administer the product at the end of the period of fly
activity and before the larvae reach their resting sites: seek professional advice on the
correct timing of treatment.
ii) Special precautions to be taken by the person administering the veterinary
medicinal product to animals
Do not smoke, eat or drink whilst handling the product. Wash hands after use. Direct
contact with the skin should be avoided. Wear gloves and glasses when handling the
veterinary medicinal product. Take care to avoid self-injection: the product may cause
local irritation and/or pain at the injection site. In case of accidental self-injection, seek
medical advice and show the label to the doctor.
iii) Other precautions
The product is very toxic to aquatic organisms and dung insects. Treated cattle should not
have direct access to ponds, streams or ditches for 14 days after treatment. Long term
effects on dung insects caused by continuous or repeated use cannot be excluded.
Therefore repeated treatments on a pasture within a season should only be given on the
advice of a veterinarian.
None known.
This veterinary medicinal product does not require any special temperature storage
conditions.
Keep the container in the outer carton in order to protect from light.
Meat and offal: 66 days
Not authorised for use in animals producing milk for human consumption.
Do not use in pregnant animals which are intended to produce milk for human
consumption within 60 days of expected parturition.
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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