POM-V Prescription Required

Florocol Premix for Medicated Feeding Stuff 500mg/g for Atlantic Salmon

Active ingredient: Florfenicol

Form

Premix

Species

Atlantic salmon

Manufacturer

Intervet International B.V.

VMD MA No.

06376/4130

What it's used for

AN: 00849/2023Page 2 of 8

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.

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

Florocol Premix for Medicated Feeding Stuff 500mg/g for Atlantic Salmon — SPC Details

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

AN: 00849/2023Page 2 of 8

Dose: 10 mg/kg bodyweight. The incorporation rate in feed must be calculated to
achieve this dosage. Affected fish should receive the medicated feed daily for 10
consecutive days.
The intake of medicated feed depends on the clinical condition of the animals. In
order to obtain the correct dosage, the concentration of florfenicol may need to be
adjusted accordingly.
For incorporation into dry feed at a registered mill.
A manufacturer who is approved to incorporate veterinary medicinal products or
premixtures containing such products directly at any concentration must be
responsible for mixing when incorporation is less than 2 kg per tonne for final feed.
The premix should be mixed with oil before incorporation into dry feed.
To ensure thorough dispersion, the veterinary medicinal product should first be mixed
with, or surface-coated onto, a suitable quantity of feed before incorporation in the
final mix.
Table: Examples of incorporation rates:
Feeding rate
(as % of fish bodyweight)
Quantity (kg) of the
veterinary medicinal
product per tonne of
medicated feed
Fish (kg) medicated daily
per tonne of medicated
feed
0.54200 000 kg1.02100 000 kg2.0150 000 kg

Do not use in brood stock.

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 its local representative or the national
competent authority via the national reporting system. See the package leaflet for
respective contact details.

None

Special precautions for safe use in the target species:
Use of the veterinary medicinal product should be based on susceptibility testing of
the strain of bacteria isolated from the fish. If this is not possible, therapy should be
based on local (regional, farm level) epidemiological information about susceptibility
of the target bacteria.
Chloramphenicol type antibacterials may prolong the effects of anaesthetics.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
Avoid inhalation of dust. Wear either a disposable half-mask respirator conforming to
European standard EN 149 or a non-disposable respirator to European Standard
EN 140 with a filter to EN 143, chemically resistant gloves, protective coveralls and
goggles while incorporating the premix into the feed.
Avoid contact with the skin and eyes. Wear chemically resistant gloves, protective
overalls and safety glasses while incorporating the premix into the feed.
Wear gloves and do not smoke, drink or eat while handling the veterinary medicinal
product or medicated feed.
Wash hands thoroughly with soap and water after use of the veterinary medicinal
product or medicated feed.
Clean thoroughly all equipment used for medicating feed.
In case of accidental self-ingestion seek medical advice immediately and show the
package leaflet or the label to the physician.
Special precautions for the protection of the environment:
Not applicable.
Other precautions:
In the UK, it is essential to obtain a discharge consent from the local regional office of
the Environment Agency or SEPA.

None known.

Do not store above 30 °C.
Protect from light.
Store in a dry place.
Store away from food, drink and animal feeding stuff.

150 degree days (15 days from the last treatment at 10 °C).
4.

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.