POM-V Prescription Required

Forcyl 160 mg/ml Solution for Injection for Cattle

Active ingredient: Marbofloxacin

Form

Injection

Species

Cattle

Manufacturer

Vetoquinol UK Limited

VMD MA No.

08007/5060

What it's used for

In lactating cows: - Treatment of acute mastitis caused by sensitive strains of

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.

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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

Forcyl 160 mg/ml Solution for Injection for Cattle — SPC Details

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

In lactating cows:
- Treatment of acute mastitis caused by sensitive strains of

To ensure a correct dosage, body weight should be determined as accurately as possible.
Where there is slight cloudiness or visible particles present, such cloudiness or particles
disappear when the bottle is shaken before use.
- Therapeutic treatment of respiratory infections
10 mg/kg body weight i.e. 10 ml /160 kg body weight in a single intramuscular injection.
- Treatment of acute mastitis caused by sensitive strains of
10 mg/kg body weight i.e. 10 ml/160 kg body weight in a single intramuscular or
intravenous injection.
If the volume to be injected intramuscularly is more than 20 ml, it should be divided
between two or more injection sites.

Do not use in cases of hypersensitivity to the active substance, other fluoroquinolones or
to any of the excipients.
Do not use in cases where the pathogen involved is resistant to other fluoroquinolones
(cross resistance).

Cattle:
Very rare
(<1 animal / 10,000 animals treated,
including isolated reports):
Injection site reaction (e.g pain, swelling)
Arthropathy
Anaphylactic-type reaction
1
Transient reaction if injected intramuscularly. May persist up to 7 days after injection.
Such lesions were observed in cattle after a three days treatment. These lesions did not
induce clinical signs and should be reversible, particularly if they were to be observed after
a single administration.
With a potentially fatal outcome.
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 the package leaflet for respective contact details.

The efficacy of the veterinary medicinal product has not been tested on mastitis caused by
Gram positive bacteria.

Special precautions for safe use in the target species:
Official and local antimicrobial policies should be taken into account when this veterinary
medicinal 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.
Wherever possible, use of the veterinary medicinal product should only be based on
susceptibility testing.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
People with known hypersensitivity to (fluoro)quinolones should avoid contact with the
veterinary medicinal product.
Wash hands after use.
In case of contact with skin or eyes, rinse with plenty of water.
Care should be taken to avoid accidental self-injection.
In case of accidental self-injection, seek medical advice immediately and show the label or
the package leaflet to the physician.
Accidental self-injection can induce a slight irritation
Special precautions for the protection of the environment:
Not applicable.

None known.

This veterinary medicinal product does not require any special storage conditions.

Meat and offal: 5 days.
Milk: 48 hours.

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.