POM-V Prescription Required Companion Animal

VETERELIN 4 microgram/ml Solution for Injection for Cattle, Horses, Pigs, and Rabbits

Active ingredient: Buserelin

Form

Injection

Species

Cattle Horses Pigs Rabbits

Manufacturer

Laboratorios Calier, S.A.

VMD MA No.

20634/5003

What it's used for

For cows: - Ovulation induction or delayed ovulation - Treatment of anoestrus - Treatment of follicular cysts with or without symptoms of nymphomania - Imp...

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 Buserelin

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

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.

Clinical information

VETERELIN 4 microgram/ml Solution for Injection for Cattle, Horses, Pigs, and Rabbits — SPC Details

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

For cows:
- Ovulation induction or delayed ovulation
- Treatment of anoestrus
- Treatment of follicular cysts with or without symptoms of nymphomania
- Improvement of conception rate in artificial insemination procedures, also after
synchronisation of oestrus with a analogue. Results may however vary
depending on breeding conditions.

Revised: July 2025
AN: 03125/2024
For mares:
- Ovulation induction and thereby to synchronise ovulation more closely with mating
in mares.
- Treatment of follicular cysts – with or without symptoms of nymphomania
For female rabbits for reproduction:
Improvement of conception rate and ovulation induction at post-partum
insemination.
For sows (sexually mature gilts):
Ovulation induction after oestrus synchronisation with an analogue of progestagen
(altrenogest) in order to perform a single artificial insemination.

In cattle, horses and rabbits, the preferred route of administration is intramuscular
injection (i.m.), but it may also be injected intravenously (i.v.) or subcutaneously
(s.c.).
In pigs, the preferred route of administration is intramuscularly (i.m.), but it may also
be injected intravenously (i.v.).

Revised: July 2025
AN: 03125/2024
SpeciesIndication
µg
Buserelin
per
animal
ml Veterelin
4µg/ml per
animal
Treatment of anoestrus 205Ovulation induction205Delayed ovulation102.5Improvement of conception rate in artificial
insemination procedures, also after
synchronisation of oestrus with a
analogue. Results may however vary
depending on breeding conditions.
For oestrus synchronisation in cows according
to a 10 day fixed time insemination regime,
buserelin should be administered at day 0
followed by PGF2alpha treatment at day 7, and
a second buserelin treatment at day 9
according to the mentioned posology
102.5
Cows
Follicular cysts with or without symptoms of
nymphomania
Treatment of follicular cysts -with or without
symptoms of nymphomania
Mares
Ovulation induction and thereby to synchronize
ovulation more closely with mating in mares.
40 10
Sows
(sexually
mature gilts)
Ovulation induction after oestrus
synchronization with an analogue of
progestagen (altrenogest) in order to perform a
single artificial insemination. Administration
should be done 115-120 hours after the end of
synchronization with a progestagen. A single
artificial insemination should be performed 30-
33 hours after VETERELIN administration.
102.5
Improvement of conception rate0.80.2 Female
rabbits for
reproduction
Ovulation induction at post-partum
insemination
0.80.2
The veterinary medicinal product should be administered once.
The vial can only be broached a maximum of 20 times.
device, or a suitable withdrawal needle, must be used to avoid excessive
perforation of the closure.

Do not use in cases of hypersensitivity to the active substance or to any of the
excipients.

None known.
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 the national competent authority via
the national reporting system. See also the last section of the package leaflet for
respective contact details.

Treatment with a GnRH (gonadotrophin releasing hormone) analogue is only
symptomatic; the causes underlying a fertility disorder are not eliminated by this
treatment.

i. Special precautions for use in animals
In sows (sexually mature gilts), use of the veterinary medicinal product contrary to
the recommended protocols may result in the formation of follicular cysts which may
detrimentally affect fertility and prolificacy. An aseptic technique is recommended.
ii. Special precautions to be taken by the person administering the veterinary
medicinal product to animals.
Avoid eye and skin contact with the solution for injection. In case of accidental
contact, rinse thoroughly with water. Should skin contact with the veterinary
medicinal product occur, wash the exposed area immediately with soap and water,
as GnRH analogues may be absorbed through the skin.
People with known hypersensitivity to buserelin or benzyl alcohol should avoid
contact with the veterinary medicinal product.
The veterinary medicinal product should not be administered by the product, as
buserelin has been shown to be foetotoxic in laboratory animals.
Women of child-bearing age should administer the product with caution.

Revised: July 2025
AN: 03125/2024
When administering the veterinary medicinal product, care should be taken to avoid
accidental self-injection by ensuring that animals are suitably restrained and the
application needle is shielded until the moment of injection.
In case of accidental self-injection, seek medical advice immediately and show the
package leaflet or the label to the physician. Wash hands after use.
Special precautions for the protection of the environment:
Not aplicable
Other precautions:
Not aplicable

None known.

Do not store above 25
o
C.
Keep the vial in the outer carton in order to protect from light.

Meat and offal: zero days
Milk: zero hours
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.