POM-V Prescription Required

Selectan 300 mg/ml Solution for Injection for Cattle and Swine

Active ingredient: Florfenicol

Form

Injection

Species

Cattle Pigs

Manufacturer

Laboratorios Hipra SA

VMD MA No.

17533/3010

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

Selectan 300 mg/ml Solution for Injection for Cattle and Swine — SPC Details

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

AN: 00849/2023Page 2 of 8

Cattle:
20 mg/kg bodyweight (1 ml of the product per 15 kg) by intramuscular route to be
administered twice 48 hours apart.
For treatment of cattle over 150 kg body weight, divide the dose so that no more than
10 ml are injected at one site.
Pigs:
15 mg/kg bodyweight (1 ml of the product per 20 kg) by intramuscular injection into the
neck muscle twice at 48 hours intervals.
For treatment of pigs over 60 kg body weight, divide the dose so that no more than
3 ml are injected at one site.
To ensure a correct dosage, body weight should be determined as accurately as
possible.

Do not use in adult bulls or boars intended for breeding purposes.
Do not use in cases of hypersensitivity to the active substance or to any of the
excipient(s).
Do not use in piglets of less than 2 kg.

Cattle:
Very rare
(<1 animals / 10 000 animals
treated):
Injection site lesion
,

Injection site inflammation
Reduced food intake
Soft stool
2,3
Persists for up to 14 days.
The treated animals recover quickly and completely upon termination of treatment.
Transient.
Pigs:
Very common (>1 / 10 animals
treated):
Diarrhoea
1,2
Oedematous erythema
2,3
Very rare
(<1 animals / 10 000 animals
treated):1
Injection site swelling
, Injection site lesion
,

Injection site inflammation
1
Transient.
May affect 50% of the animals and can be observed for one week.
Perianal, rectal.
Transient, lasting up to 5 days.
May be seen for up to 28 days.
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:
Swab the septum before removing each dose.
Use a dry, sterile syringe and needle.
Use of the veterinary medicinal product should be based on susceptibility testing and
in accordance with official, national and local antimicrobial policies.
Use of the product deviating from the instructions given in the SPC may increase the
prevalence of bacteria resistant to the florfenicol and may decrease the effectiveness
of treatment with other amfenicols, due to the potential for cross-resistance.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
Care should be taken to avoid accidental self-injection.
Avoid contact with eyes and skin.
If eye exposure occurs, flush eyes immediately with clean water.
If skin exposure occurs, wash the affected area with clean water.
Wash hands after use.
People with known hypersensitivity to florfenicol should avoid contact with the
veterinary medicinal product.
Laboratory studies in rabbits and rats with the excipient N-methyl pyrrolidone have
shown evidence of foetotoxic effects. Women of childbearing age, pregnant women or
women suspected of being pregnant should use the veterinary medicinal product with
serious caution to avoid accidental self-injection.
Special precautions for the protection of the environment:
The use of this veterinary medicinal product may pose a risk for terrestrial plants,
cyanobacteria and groundwater organisms.

None known.

Keep the bottles in the outer carton.

Cattle:
Meat and offal: 30 days.
Not authorised for use in animals producing milk for human consumption.
Pigs:
Meat and offal: 18 days.
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.