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NFA-VPS Over the Counter Companion Animal

Rearguard 60 mg/ml Cutaneous Solution

Active ingredient: Cyromazine

Form

Solution

Species

Rabbits

Manufacturer

Elanco GmbH

VMD MA No.

52127/5069

What it's used for

For the prevention of blowfly strike (Lucilia sericata) in domestic rabbits for up to 10 weeks after dosing

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 Cyromazine

  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.

Clinical information

Rearguard 60 mg/ml Cutaneous Solution — SPC Details

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

For the prevention of blowfly strike (Lucilia sericata) in domestic rabbits for up to
10 weeks after dosing
Rearguard comes supplied ready-to-use in a bottle with built-in applicator sponge.
Gently depress the sponge to break the valve before applying.
Apply the product using the sponge applicator, ensuring that the rabbit’s fur is
thoroughly wetted with the solution from the middle of the back to the tip of the tail.
Special attention should be paid to the areas under the tail and between the back
legs. Do not allow the product to run off the animal.
Rabbits should be first treated in early summer before any flies are seen.
Rearguard will not kill adult maggots but works by preventing any eggs laid by
flies developing.
Rabbits should be treated at 8-10 week intervals under conditions of repeated
blowfly challenge. Bathing or washing the rabbit after application may result in a
reduction of efficacy.
In cases of existing flystrike, adult maggots should be removed by mechanical
means and appropriate supportive treatment given. Rearguard should then be
applied to the fur to prevent development of new larvae and re-strike.
Not to be used on rabbits less than 10 weeks of age. Do not apply to broken skin.
Treated rabbits may show a transient reduction in appetite in the 24-48 hours
following treatment.
If the rabbit is continually attractive to flies, this may be due to an underlying
disease e.g. diarrhoea or incontinence, or a lack of hygiene within it’s housing. In
such cases further advice should be sought from your veterinary surgeon.

Revised: March 2025
AN: 03752/2024

i. Special precautions for use in animals
Care should be taken in the treatment of old, sick or debilitated rabbits.
ii. Special precautions to be taken by the person administering the veterinary
medicinal product to animals
Wash hands and exposed skin after use.
Wash splashes from skin and eyes immediately.
Do not smoke whilst using the product.
None known
Do not store above 25C.
Protect from frost.
Protect from direct sunlight.
Shake the container before use.
Store in tightly closed original container.
Store away from food and drink.
Not to be used on rabbits intended for human consumption.
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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