POM-V Prescription Required

Mycoflor 200 mg/ml, Solution for Use in Drinking Water for Pigs

Active ingredient: Florfenicol

Form

Solution

Species

Pigs

Manufacturer

SP Veterinaria, S.A.

VMD MA No.

36967/5002

What it's used for

established before initiating metaphylactic treatment.

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

Mycoflor 200 mg/ml, Solution for Use in Drinking Water for Pigs — SPC Details

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

established before initiating metaphylactic treatment.

The recommended dose is 10 mg florfenicol per kg body weight daily (corresponding
to 5 mL of the veterinary medicinal product / 100 kg b.w.) given for 5 consecutive
days.
The uptake of medicated water depends on several factors including the clinical state
of the animals and local conditions such as ambient temperature and humidity. In
order to obtain the correct dosage water uptake has to be monitored and the
concentration of florfenicol has to be adjusted accordingly. If however it is not
possible to obtain sufficient uptake of medicated water animals should be treated
parenterally.
Based on the recommended dose and the number and weight of animals to be
treated, the exact daily concentration of the veterinary medicinal product should be
calculated according to the following formula:
.....mL veterinary
medicinal product/
kg
body weight/day
x
average body weight (kg)
of animals to be treated
average daily water/milk replacer consumption (l) per
animal
=
.... mL veterinary
medicinal product
per litre of drinking
water / milk replacer
To ensure a correct dosage body weight should be determined as accurately as
possible.
The appropriate quantity of medicated water should be prepared based on the daily
water intake.

The veterinary medicinal product should be added to the drinking water by thorough
stirring until the veterinary medicinal product is completely dissolved. Sufficient
access to the water supply should be available for the animals to be treated to ensure
adequate water intake. No other source of drinking water should be available during
the medication period. In free range husbandry systems animals should be housed
during treatment.
The water supply should be cleaned appropriately after the end of the medication
period to avoid intake of sub-therapeutic amounts of active substance.
AN: 01394/2025 & 01396/2025
FOR PROPORTIONER:
1. Introduce the amount of the veterinary medicinal product in the proportioner and
dilute with drinking water as follows (examples):
Weight of animals Amount of veterinary
medicinal product
Amount of water (corr. to 1 mg
florfenicol/mL of water)
500 kg25 mL 5 L 1000 kg50 mL 10 L10,000 kg500 mL 100 L
2. Mix thoroughly.
3. Set the proportioner on 10 %.
4. Turn on the proportioner.
Warning:
precipitate.

Do not use in cases of hypersensitivity to the active substance or to any of the
excipients.
Do not use in cases of resistance to the active substance.
Do not use in boars intended for breeding purposes. Studies in rats have revealed
evidence of potential adverse effects on the male reproductive system.
See section 3.7
AN: 01394/2025 & 01396/2025

Pigs.
Common
(1 to 10 animals / 100 animals
treated):
Erythema (peri-anal)
Decreased drinking
Constipation
, Abnormal stool colouration
1,2
,
Soft stool
, Rectal prolapse
Very rare
(<1 animal / 10 000 animals
treated, including isolated reports):
Neurological signs
Death
1 transient, short-term and do not affect the general condition of the animals
2 dark brown
3 retroceding without treatment
4 the medication should be withdrawn immediately and unmedicated water provided.
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.

The treated pigs should be placed under special observation. On each of the five
days of treatment, unmedicated drinking water should not be given until the full daily
amount of medicated drinking water has been ingested by pigs.
In case of insufficient water intake, animals should be treated parenterally.

Special precautions for safe use in the target species:
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.
Use of the veterinary medicinal product should be in accordance with official, national
and regional antimicrobial policies.
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 amphenicols due to the potential for
cross-resistance.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
This veterinary medicinal product may cause hypersensitivity reactions.
People with known hypersensitivity to florfenicol, dimethylacetamide or propylene
glycol should avoid contact with the veterinary medicinal product.
This veterinary medicinal product contains dimethylacetamide, which has been
shown to have the potential to affect the development of unborn children.
Pregnant women and women of child-bearing age should avoid working with this
veterinary medicinal product.
Contact of the veterinary medicinal product or the medicated drinking water with skin
and eyes including hand-to-eye-contact should be avoided.
Personal protective equipment consisting of protective gloves, coverall and safety
glasses should be worn when handling and mixing the veterinary medicinal product.
Do not smoke, eat or drink when handling the veterinary medicinal product or mixing
the medicated drinking water.
In case of accidental spillage into eyes, wash them immediately with water.
AN: 01394/2025 & 01396/2025
In case of contact with skin, wash the affected area immediately and remove any
contaminated clothing.
If you develop symptoms following exposure such as skin rash, seek medical advice
and take the package leaflet or the label with you.
Wash hands after use.
Special precautions for the protection of the environment:
Not applicable.

No data available.
AN: 01394/2025 & 01396/2025

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

Meat and offal: 23 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.