POM-V Prescription Required

Noroclox DC 500 mg Intramammary Suspension

Active ingredient: Cloxacillin

Form

Intramammary

Species

Cattle

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/4040

What it's used for

For routine use in cows at drying-off to treat existing intramammary infections and to assist in preventing new infections occurring during the dry period....

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 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

Noroclox DC 500 mg Intramammary Suspension — SPC Details

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

For routine use in cows at drying-off to treat existing intramammary infections
and to assist in preventing new infections occurring during the dry period. It is
effective against;
Streptococcus agalactiae
Streptococcus dysgalactiae
Other Streptococcal spp
Staphylococci spp
Arcanobacterium pyogenes
The product maintains effective antibacterial levels in the dry cow udder for
approximately 4 weeks and is bactericidal in action.

The contents of one intramammary syringe should be gently infused into each
quarter immediately after the final milking of a lactation.

Do not use in animals with known hypersensitivity to the active ingredient.

None known

None

Revised: August 2011
AN: 00406/2004

i. Special precautions for use in animals
Official national and regional antimicrobial policies should be taken into
account when the product is used.
Before infusion, the teat should be thoroughly cleaned and disinfected
and care should be taken to avoid contamination of the injector nozzle.
Following infusion, it is advisable to use a teat dip or spray.
ii. Special precautions to be taken by the person administering the
veterinary medicinal product to animals
When infusing heifers, protective gloves should always be worn in
order to avoid skin contact with the product.
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.
Wash hands after use.

None known

Revised: August 2011
AN: 00406/2004

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

Meat and Offal: 28 days
Not intended for use within 35 days of calving.
Milk for human consumption may only be taken from 108 hours after calving.
Should a cow calve earlier than 35 days after the last treatment, milk for
human consumption may only be taken from 35 days plus 108 hours after the
last treatment.
In cows suffering from hypocalcaemia it may be necessary to withhold milk for
a longer period than that stated above. In such cases, milk should be withheld
until the levels of antibiotics are below the maximum accepted residue levels,
i.e. 0.03 mcg/ml. for cloxacillin.
The product must not be used in the treatment of lactating cows.
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.