POM-V Prescription Required

Florinject 300 mg/ml Solution for Injection for Cattle and Pigs

Active ingredient: Florfenicol

Form

Injection

Species

Cattle Pigs

Manufacturer

Laboratorios Calier, SA

VMD MA No.

20634/3003

What it's used for

The presence of the disease in the herd should be established before metaphylaxis. Pigs: Treatment of acute outbreaks of respiratory disease caused by stra...

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 Florfenicol

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

Florinject 300 mg/ml Solution for Injection for Cattle and Pigs — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.

The presence of the disease in the herd should be established before
metaphylaxis.
Pigs:
Treatment of acute outbreaks of respiratory disease caused by strains of
Actinobacillus pleuropneumoniae Pasteurella multocida
florfenicol.

Pigs: Intramuscular injection.

Cattle:
Treatment
IM route: 20 mg florfenicol /kg bodyweight (1ml of the product/15kg) to be
administered twice 48 hours apart using a 16 gauge needle.
SC route: 40 mg florfenicol /kg bodyweight (2ml of the product /15kg) to be
administered once only using a 16 gauge needle.
Metaphylaxis
SC route: 40 mg florfenicol /kg bodyweight (2ml of the product /15kg) to be
administered once only using a 16 gauge needle.
AN: 00833/2023 & 01238/2023Page 6 of 10
Pigs:
15 mg florfenicol /kg bodyweight (1 ml of the product/ 20 kg) by intramuscular
injection twice at 48 hour intervals using a 16 gauge needle.
The dose volume given at any one injection site should not exceed 10 ml for
both routes of administration (intramuscular and subcutaneous) in cattle and 3
ml in pigs. The injection should only be given in the neck in both target species.
To ensure a correct dosage body weight should be determined as accurately as
possible to avoid underdosing.
It is recommended to treat animals in the early stages of disease and to
evaluate the response to treatment within 48 hours after the second injection.
clinical signs of respiratory disease persist 48 hours after the last injection or if
relapse occurs, treatment should be changed using another formulation or
another antibiotic and continued until clinical signs have resolved.
Swab septum before removing each dose. Use a dry sterile needle and syringe.
Do not broach the vial more than 25 times.

Do not use in adult bulls and boars intended for breeding purposes.
Do not use in cases of hypersensitivity to the active substance or to any of the
excipients.

Cattle:
Very rare
(<1 animal / 10,000 animals treated, including
isolated reports):
Anaphylactic-type
reaction
AN: 00833/2023 & 01238/2023Page 4 of 10
Undetermined frequency:Reduced food intake
Pasty stool
1,3
Injection site
inflammation
1
may occur during the treatment period. The treated animals recover quickly
and completely upon termination of treatment.
persists for 14 days.
transient.
Pigs:
Very common
(>1 animal / 10 animals treated):
Diarrhoea
Erythema/oedema
5,6
Pyrexia
Depression
Dyspnoea
Undetermined frequency:Injection site swelling
4,8
Injection site
inflammation
4
transient.
peri-anal and rectal.
can be observed for one week.
pyrexia is associated with either moderate depression or moderate dyspnoea.
Observed a week or more after administration of the second dose.
lasting up to 5 days.
may be seen up to 28 days.
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.
AN: 00833/2023 & 01238/2023Page 5 of 10

None.

Special precautions for safe use in the target species:
Do not administer to piglets of less than 2 kg.
Use of the veterinary medicinal product should be based on susceptibility
testing of the bacteria isolated from the animal. If this is not possible, therapy
should be based on local (regional, farm level) epidemiological information
about susceptibility of the target bacteria.
Official national and regional antimicrobial policies should be taken into account
when the veterinary medicinal product is used.
AN: 00833/2023 & 01238/2023Page 3 of 10
Use of the veterinary medicinal product deviating from the instructions given in
the SPC may increase the prevalence of bacteria resistant to florfenicol and
may decrease the effectiveness of treatment with other antimicrobials due to the
potential for cross-resistance. An antibiotic with a lower risk of antimicrobial
resistance selection (lower AMEG category) should be used for first line
treatment where susceptibility testing suggests the likely efficacy of this
approach.
Special precautions to be taken by the person administering the veterinary
medicinal product to animals:
This veterinary medicinal product may cause hypersensitivity (allergy).
People with known hypersensitivity to florfenicol or propylene glycol should
avoid contact with the veterinary medicinal product.
Laboratory studies in rabbits and rats with the excipient N-methyl pyrrolidone
have shown evidence of foetotoxic effects. Women of childbearing age,
pregnant women or women suspected of being pregnant should use the
veterinary medicinal product with serious caution to avoid accidental self-
injection.
Care should be taken to avoid accidental self-injection.
self-injection, seek medical advice immediately and show the package leaflet or
the label to the physician.
Avoid skin or eye contact with the veterinary medicinal product. In case of
contact with the skin or eyes, rinse the affected area immediately with plenty of
water. Wash hands after use.
Special precautions for the protection of the environment:
The use of this veterinary medicinal product may pose a risk for terrestrial
plants, cyanobacteria and groundwater organisms.

interaction
None known.

Keep the vial in the outer carton in order to protect from light.

Cattle:
Meat and offal: by IM (at 20 mg/kg bodyweight, twice): 30 days.
by SC (at 40 mg/kg bodyweight, once): 44 days.
Milk: Not authorised for use in animals producing milk for human consumption,
including during the dry period.
Pigs:
Meat and offal: 18 days.

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.