KRKA Fenflor 300mg/ml Injection

Fenflor 300mg/ml Injection

from £54.20 ex VATfrom £65.04 inc VAT

Type: POM-V

PLEASE NOTE: A prescription issued by a UK registered vet (MRCVS) is required before this item can be dispatched.

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Product Description

For use in diseases caused by florfenicol susceptible bacteria.    

Treatment and metaphylaxis of respiratory tract infections in cattle due to Mannheimia haemolytica, Pasteurella multocida and Histophilus somni, where the presence of the disease in the herd has been established.

Dosage & Administration

For treatment:

  • IM route: 20 mg/kg bodyweight (1 ml/15 kg) to be administered twice 48 hours apart.
  • SC route: 40 mg/kg bodyweight (2 ml/15 kg) to be administered once only using a 16 gauge needle.

For metaphylaxis where the presence of the disease in the herd has been established:

  • SC route: 40 mg/kg bodyweight (2 ml/15 kg) to be administered once only using a 16 gauge needle.

The dose volume given at any one injection site should not exceed 10 ml.

The injection should only be given in the neck.

To ensure a correct dosage body weight should be determined as accurately as possible to avoid under dosing.

Use during pregnancy and lactation

Studies in laboratory animals have not revealed any evidence of embryo- or foetotoxic potential for florfenicol.

However, the effect of florfenicol on bovine reproductive performance and pregnancy has not been assessed. Use only accordingly to the benefit/risk assessment by the responsible veterinarian.


Meat & Offal:

  • by IM (at 20 mg/kg bodyweight, twice): 30 days
  • by SC (at 40 mg/kg bodyweight, once): 44 days

Not authorised for use in animals producing milk for human consumption.

Data Sheet

To read the full data sheet click the link below

 Fenflor 300mg/ml Injection

Delivery & Returns

With the Farmacy business moving from West Sussex to Cheshire over the Christmas and New Year break, we will be closed from midday on Friday 22nd December. Nothing will then be dispatched from that date until 2nd January 2024.

This makes it more important than ever to plan your ordering to ensure you are covered. For last delivery dates for Pre-Christmas delivery click here.





Non-refrigerated items

By 6pm


Refrigerated items

By 12am

£0 - £149.99



£150 - £299.99



£300 - £449.99



£450 or more



Delivery to United Kingdom only

Please note there is a small excess for despatch to Highlands and Islands and Isle of Wight as governed by your postcode.

  1. To keep our prices as low as possible, we do not hold stock of most products. We order stock from our wholesaler at 4.30 each day, so any orders received after this time will not be ordered until the following day. 
  2. Orders placed on a Thursday or Friday that have refrigerated items included will not be dispatched until the following Monday to ensure that the items are delivered to you under controlled conditions. This means that you should receive these items on a Tuesday by 12pm.
  3. We do not offer a Saturday or Sunday delivery service.
  4. Standard and Priority costs apply to the UK mainland only.
  5. Delivery to Scottish Highlands and Islands and Isle of Wight may incur an excess to cover additional carriage costs - this is dependent on your postcode. Full details can be found by clicking the link below.
  6. Customers who arrange to collect from Warnham should not arrive before 12pm.
  7. We are no longer able to ship to Northern Ireland due to extra administrative costs since January 2021. Any orders placed online will be cancelled and refunded.

For full delivery details click here 

Faulty Goods Returns

In the unlikely event that you receive faulty or damaged goods please call 01306 628215 within 72 hours of receipt of your goods. Please have your order reference to hand. You will be asked to provide evidence of the damaged goods if damaged in transit.

Restricted Goods Returns

We are unable to offer refunds on the following products.

  • Animal medicines - general & vaccines
  • Refrigerated/temperature sensitive products

Please contact the Farmacy Team before sending any returns on 01306 628215.

For full returns details click here

Product Species

  • Cattle - Dairy
    Cattle - Dairy
  • Cattle - Beef
    Cattle - Beef
Home Delivery

UK mainland delivery from £8.00

Reward Points

Earn up to 126 reward points with this product.

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