POM-V Prescription Required

Masterflox 40 mg/ml Solution for Injection for Pigs

Active ingredient: Marbofloxacin

Form

Injection

Species

Pigs

Manufacturer

Fatro S.p.A

VMD MA No.

11557/4001

What it's used for

Treatment of respiratory infections caused by strains of Pasteurella multocida, Mycoplasma hyopneumoniae .

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 Marbofloxacin

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.

Your prescription rights → VMD register of retailers →

Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Masterflox 40 mg/ml Solution for Injection for Pigs — SPC Details

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

Treatment of respiratory infections caused by strains of
Pasteurella multocida, Mycoplasma hyopneumoniae .

For intramuscular use.

Revised March 2019
AN: 00757/2018
The recommended dosage is 2 mg marbofloxacin/kg body weight (equivalent to 0.5 ml of
veterinary medicinal product/ 10 kg body weight) in a single daily intramuscular injection,
for 3-5 consecutive days.
To ensure administration of a correct dose, body weight should be determined as
accurately as possible, to avoid underdosing.
The preferred injection site is the neck area.
The vial may be broached up to 20 times.
The user should choose the most appropriate vial size according to the bodyweight and
number of animals to be treated.

Do not use in cases where the pathogen involved is resistant to marbofloxacin and other
(fluoro)quinolones (cross-resistance).
Do not use in cases of hypersensivity to the active substance, to any other quinolone or to
any of the excipients.

Transient local reactions such as oedema, pain and swelling at the injection site and
inflammatory lesions, which may persist for 6 days, may be uncommonly caused by
intramuscular administration .
The frequency of adverse reactions is defined using the following convention:
- very common (more than 1 in 10 animals treated displaying adverse reaction(s))
- common (more than 1 but less than 10 animals in 100 animals treated)
- uncommon (more than 1 but less than 10 animals in 1,000 animals treated)
- rare (more than 1 but less than 10 animals in 10,000 animals treated)
- very rare (less than 1 animal in 10,000 animals treated, including isolated reports).

None.

This product does not contain an antimicrobial preservative.

Revised March 2019
AN: 00757/2018
Special precautions for use in animals
Official and local antimicrobial policies should be taken into account when the product is
used. Fluoroquinolones should be reserved for the treatment of clinical conditions which
have responded poorly, or are expected to respond poorly, to other classes of
antimicrobials.
Whenever possible, fluoroquinolones should only be used based on susceptibility testing.
Use of the product deviating from the instructions given in the SPC may increase the
prevalence of bacteria resistant to the fluoroquinolones and may decrease the
effectiveness of treatment with other quinolones due to the potential for cross resistance.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
(Fluoro)quinolones may cause hypersensitivity (allergy) in sensitised people. People with
known hypersensitivity to (fluoro)quinolones or any of the excipients should avoid contact
with the veterinary medicinal product.
Avoid contact of the skin and eyes with the product. In case of accidental spillage onto skin
or eyes, rinse the affected area with large amounts of water.
Avoid accidental self-injection, since this can cause local irritation. In case of self-injection
or ingestion, seek medical advice immediately and show the package leaflet or the label to
the physician.
Wash hands after use.

None known.

Store in the original package. Protect from light.

Pigs
Meat and offal: 6 days.
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.