POM-V Prescription Required

Lactaclox Intramammary Infusion

Active ingredients: Ampicillin, Cloxacillin

Form

Intramammary

Species

Cattle

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/4044

What it's used for

For the treatment of clinical bovine mastitis in the lactating cow caused by Gram-positive and Gram-negative bacteria including: Streptococcus agalactiae S...

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 Ampicillin + Cloxacillin

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

Lactaclox Intramammary Infusion — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.

For the treatment of clinical bovine mastitis in the lactating cow caused
by Gram-positive and Gram-negative bacteria including:
Streptococcus agalactiae
Streptococcus dysgalactiae
Other Streptococcal spp
Staphylococcus spp
Arcanobacterium pyogenes
Escherichia coli

The contents of one syringe should be infused into each affected
quarter via the teat canal immediately after milking, at 12 hour intervals
for three consecutive milkings.

None

Revised: July 2010
ATCVet code amended

No known undesirable effects.

Before infusion, the quarter should be milked out completely, the teat
should be thoroughly cleaned and disinfected and care should be taken
to avoid contamination of the injector nozzle. Following infusion,
massage the product up into the udder, and then it is advisable to use
a teat dip or spray.

i. Special Precautions for use in animals
There are no special precautions for use in animals.
ii. Special precautions to be taken by the person administering the
product to the animals:
Penicillins and cephalosporins may cause hypersensitivity
(allergy) following injection, inhalation, ingestion or skin contact.
Hypersensitivity to penicillins may lead to cross-reactions to
cephalosporins and vice versa. Allergic reactions to these
substances may occasionally be serious.
1. Do not handle this product if you know you are sensitised,
or if you have been advised not to work with such preparations.
2. Handle this product with great care to avoid exposure,
taking all recommended precautions.
3. If you develop symptoms following exposure such as skin
rash, you should seek medical advice and show the doctor this
warning. Swelling of the face, lips or eyes or difficulty breathing,
are more serious symptoms and require urgent medical
attention.
Protective gloves should always be worn when infusing heifers,
to avoid contact with the product.
Wash hands after use.

interaction
None

Do not store above 25ºC.
The syringe may only be used once. Part used syringes must be
discarded.

Milk for human consumption must not be taken from a cow during
treatment. With cows milked twice daily, milk for human consumption
may only be taken from 60 hours (i.e. at the 5th milking) after the last
treatment. Where any other routine is followed, consult your veterinary
surgeon. With other milking routines, the basis of a veterinary
surgeon's advice should be that milk may be taken for human
consumption only after the same period from the last treatment. For
example with three times a day milking with a product administered
twice per day, milk for human consumption may only be taken at the
8th milking.
Animals must not be slaughtered for human consumption during
treatment. Cattle may be slaughtered for human consumption only
after 4 days from the last treatment.
5.

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.