Merilym 3, Suspension for Injection for Dogs
Active ingredients: Borrelia afzelii, Borrelia burgdorferi sensu stricto, Borrelia garinii
Form
Injection
Species
Manufacturer
Boehringer Ingelheim Vetmedica GmbH
VMD MA No.
04491/3033
What it's used for
Reduction of transmission of and no correlation has been established between a specific level of antibodies and reduction of that leads to the development...
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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.
Merilym 3, Suspension for Injection for Dogs — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
and no correlation has been established between a specific level of antibodies and
reduction of
that leads to the development of clinical disease has not been studied.
Onset of immunity: 1 month after primary vaccination.
Duration of immunity: 1 year after primary vaccination.
Subcutaneous use.
Shake the vial well before use.
Primary vaccination:
Administer two doses separated by an interval of 3 weeks.
Revaccination:
Annual revaccination with a single dose is recommended to maintain immunity
although this schedule has not been investigated.
Vaccination should be carried out prior to periods of increased tick activity, allowing
sufficient time for the immune response to vaccination to develop fully (see section
3.2) prior to expected tick exposure.
Do not use in sick animals that have intercurrent disease, heavy parasitic infestation
and/or are in poor general condition.
Do not use in case of suspected or confirmed clinical Lyme borreliosis.
Do not use in cases of hypersensitivity to the active substances, to the adjuvant or to
any of the excipients.
Rare
(1 to 10 animals / 10 000
animals treated):
Injection site swelling.
Anorexia, lethargy.
Very rare
(<1 animal / 10 000 animals
treated, including isolated
reports):
Injection site swelling.
Elevated temperature.
Hypersensitivity reaction.
1
Up to 7 cm in diameter, for up to 5 days.
Up to 15 cm in diameter.
Transient, up to 1.5°C.
Which may require appropriate symptomatic 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 the package leaflet for
respective contact details.
Special precautions for safe use in the target species:
No information is available on the use of the vaccine in seropositive animals including
those with maternally derived antibodies.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
Not applicable.
Special precautions for the protection of the environment:
Not applicable.
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 refrigerated (2 °C – 8 °C).
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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Related Conditions
Other Products Containing Borrelia afzelii
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Alternative options to consider
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