PREVEXXION RN Concentrate and Solvent for Suspension for Injection
Active ingredient: Marek's disease virus
Form
Injection
Species
Manufacturer
Boehringer Ingelheim Vetmedica GmbH
VMD MA No.
61700/5040
What it's used for
For active immunisation of one-day-old chicks to prevent mortality and clinical signs and reduce lesions caused by MD virus (including very virulent MD vir...
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Paying less for Marek's disease virus
-
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.
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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.
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Prescription required
Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.
PREVEXXION RN Concentrate and Solvent for Suspension for Injection — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
and reduce lesions caused by MD virus (including very virulent MD virus).
Onset of immunity: 5 days after vaccination.
Duration of immunity: A single vaccination is sufficient to provide protection for
the entire risk period.
Amended pages: January 2026
AN: 02476/2024
Special precautions for use in animals:
Apply the usual aseptic precautions to all administration procedures.
As this is a live vaccine, the vaccine strain may be excreted from vaccinated birds,
but it has not been shown to spread in experimental conditions.
Nevertheless, appropriate veterinary and husbandry measures should be taken to
avoid spread of the vaccine strain to unvaccinated chickens and other susceptible
species.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
Personal protective equipment consisting of gloves, spectacles and boots should be
worn when handling the veterinary medicinal product, before withdrawing from liquid
nitrogen, and during both the ampoule thawing and opening operations. Frozen glass
ampoules may explode during sudden temperature changes. Store and use liquid
nitrogen only in a dry and well-ventilated place. Inhalation of the liquid nitrogen is
dangerous.
Special precautions for the protection of the environment:
Not applicable
Other precautions
Not applicable
mixed and administered with Vaxxitek HVT+IBD. Chickens with maternally derived
antibodies against MD, when vaccinated with the mixed products, may have a
delayed onset of immunity against infectious bursal disease (also known as Gumboro
Amended pages: January 2026
AN: 02476/2024
disease). The mixed vaccine suspension is not intended for the immunization of
embryonated eggs.
No information is available on the safety and efficacy of this vaccine when used with
any other veterinary medicinal product. A decision to use this vaccine before or after
any other veterinary medicinal product therefore needs to be made on a case-by-
case basis.
Store and transport frozen in liquid nitrogen.
The liquid nitrogen containers must be checked regularly for liquid nitrogen level and
must be refilled as needed.
Discard any ampoules that have been accidentally thawed.
Solvent:
Store below 30 °C. Do not freeze. Protect from light.
5. IMMUNOLOGICAL PROPERTIES
Pharmacotherapeutic group: Immunologicals for Aves, live viral vaccines.
ATCvet code: QI01AD03
The vaccine contains the recombinant virus RN1250 within chicken embryo cells.
The vaccine is an engineered MD virus composed of three serotype 1 strains. Its
genome also contains long terminal repeats of reticuloendotheliosis virus. The
vaccine induces an active immunity against Marek’s disease in chickens.
Amended pages: January 2026
AN: 02476/2024
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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Other Products Containing Marek's disease virus
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Cevac MD Rispens Concentrate and Solvent for Suspension for Injection for Chickens
POM-VCeva Animal Health Ltd
Nobilis Rismavac + CA126 Concentrate and Solvent for Suspension for Injection for Chickens
POM-VPSIntervet International B.V.
Nobilis Rismavac Concentrate and Solvent for Suspension for Injection for Chickens
POM-VPSIntervet International B.V.
Poulvac Marek CVI + HVT Concentrate and Solvent for Suspension for Injection for Chickens
POM-VPSZoetis UK Limited
Poulvac Marek CVI Concentrate and Solvent for Suspension for Injection
POM-VPSZoetis UK Limited
PREVEXXION RN Concentrate and Solvent for Suspension for Injection
POM-VBoehringer Ingelheim Vetmedica GmbH
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