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Florfenicol (FLOR) – Medicating Ingredient Brochure

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Status: Veterinary prescription required for approved claims

Revised July 2022

Table of approved species and claims
Approved livestock species Approved claim(s)
(abbreviated)Table note 1
Withdrawal time Name of approved brand(s)
  1. Treatment of furunculosis
12 days (meat or released as stocker fish)
  1. Aquaflor 50% Medicated Premix
  2. PAQ Flor Florfenicol Premix


Table of approved claims and brands
Approved claims Name of approved brand(s) Drug concentration in DIN product
Claim 1
  1. Aquaflor 50% Medicated Premix
  2. PAQ Flor Florfenicol Premix
Florfenicol (in a palatable base) at 500 g/kg

Claim 1

For the treatment of furunculosis caused by susceptible strains of Aeromonas salmonicida in salmon.

Level of medicating ingredient in a complete feed

200 mg/kg to 2000 mg/kg (0.020% to 0.20%) of florfenicol in the complete feed to deliver a dose of 10 mg florfenicol per kg of body weight per day.

Directions for use in a complete feed

This livestock feed contains a medically important antibiotic. To reduce the development of antimicrobial resistance and maintain effectiveness, use this antibiotic prudently.

Feed this medicated feed as the sole ration for 10 consecutive days.

Additional information (not to appear on feed labels)

For feed manufacturers

Table 1: Use rates of florfenicol medicated premix for the preparation of medicated feeds
Feeding rate (% of body weight) Amount of florfenicol medicated premix (kg) required per metric tonne of feed Kilograms (kg) of fish biomass medicated for 10 days per metric tonne of medicated feed
0.5% 4.0 20 000
1.0% 2.0 10 000
2.0% 1.0 5 000
3.0% 0.66 3 333
5.0% 0.40 2 000


  1. Treated fish must not be harvested for use in food, or released as stocker fish, for at least 12 days after the latest treatment with this drug.
  2. Do not use in fish maintained at water temperatures below 5°C.
  3. Avoid inhalation of dust and contact with skin and eyes. Wear protective clothing (mask and gloves). Wash hands after handling.
  4. Keep out of reach of children.
Additional information to be added as notes to feed labels


  1. Use medicated feed not more than 6 months after manufacture.
  2. Keep separate from other feeds.

Accepted compatibilities


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