Skip to content
POM-V Prescription Required

Permaway 600 mg Intramammary Suspension for Cattle

Active ingredient: Cloxacillin

Form

Intramammary

Species

Cattle

Manufacturer

Vetoquinol UK Limited

VMD MA No.

08007/5032

What it's used for

For the treatment of subclinical mastitis at dry-off and prevention of new intramammary infections occurring during the dry period, caused by Staphylococcu...

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. 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. 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.

Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Permaway 600 mg Intramammary Suspension for Cattle — SPC Details

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

For the treatment of subclinical mastitis at dry-off and prevention of new intramammary
infections occurring during the dry period, caused by
Staphylococcus spp., Streptococcus agalatiae, Streptococcus dysgalactiae
Streptococcus uberis, susceptible to cloxacillin.
For single intramammary use
600 mg of cloxacillin i.e. the content of one syringe should be infused once into each
quarter via the teat canal immediately after the last milking of the lactation.
Milk out thoroughly before starting administration. Before administering the medicinal
product, the teats should be thoroughly cleaned and disinfected, and care should be
taken to avoid contamination of the syringe nozzle. Administer the full content of a
syringe in each quarter. Massage after administration. After administration it is
recommended to immerse the teat in an approved disinfectant bath. Do not milk after
treatment.
Do not use in cases of known hypersensitivity to penicillins, cephalosporins, or to any
of the excipients. Do not use in cows with clinical mastitis outside the dry period.
Immediate allergic reactions have been described in some animals (agitation, tremor,
edema of the udder, eyelids and lips) which can lead to the death of the animals.
None.

Revised: September 2025
MA split from NI following AN: 01525/2025

This product does not contain any antimicrobial preservatives.
Special precautions for use in animals
Use of the product should be based on susceptibility testing of bacteria isolated from
milk samples obtained from the udder quarter(s) of each cow to be dried off. If this is
not possible, therapy should be based on local (regional, farm level) risk based
epidemiological information about the expected pathogen challenge, and susceptibility
of target bacteria.
Use of the product deviating from the instructions given in the SPC may contribute to
the development of bacterial resistance to cloxacillin which may also decrease the
effectiveness of treatment with other beta-lactamase resistant penicillins. Dry cow
therapy protocols should take local and national policies on antimicrobial use into
consideration, and undergo regular veterinary review.
The feeding of waste milk containing residues of cloxacillin to calves should be avoided
up to the end of the milk withdrawal period (except during the colostral phase), because
it could select antimicrobial-resistant bacteria within the intestinal microbiota of the calf
and increase the faecal shedding of these bacteria.
The efficacy of the product has only been established for target organisms listed in
section 4.2.
Consequently, the occurrence of a severe mastitis after drying-off (sometimes fatal)
due to other organisms, especially , is possible. To reduce
this risk it is important to observe strict aseptic technique for the administration of the
product.
Special precautions to be taken by the person administering the veterinary medicinal
product to 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 reaction to these substances may
occasionally be serious.
People with known hypersensitivity to penicillins or cephalosporins should avoid any
contact with the veterinary medicinal product.
Handle this product with great care to avoid exposure. Wear gloves during
administration of the product and wash hands after use.
In case of accidental contact with skin or eyes, wash immediately with clean water.
If you develop symptoms following exposure, such as a skin rash, you should seek
medical advice and show the physician this warning. Swelling of the face, lips or eyes
or difficulty with breathing are more serious symptoms and require urgent medical
attention.

Revised: September 2025
MA split from NI following AN: 01525/2025
The safety of the concomitant use of this medicinal product with other intramammary
medicinal products has not been established, so simultaneous use is discouraged.
Do not store above 25°C.
it could select antimicrobial-resistant bacteria within the intestinal microbiota of the calf
and increase the faecal shedding of these bacteria.
The efficacy of the product has only been established for target organisms listed in
section 4.2.
Consequently, the occurrence of a severe mastitis after drying-off (sometimes fatal)
due to other organisms, especially , is possible. To reduce
this risk it is important to observe strict aseptic technique for the administration of the
product.
Special precautions to be taken by the person administering the veterinary medicinal
product to 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 reaction to these substances may
occasionally be serious.
People with known hypersensitivity to penicillins or cephalosporins should avoid any
contact with the veterinary medicinal product.
Handle this product with great care to avoid exposure. Wear gloves during
administration of the product and wash hands after use.
In case of accidental contact with skin or eyes, wash immediately with clean water.
If you develop symptoms following exposure, such as a skin rash, you should seek
medical advice and show the physician this warning. Swelling of the face, lips or eyes
or difficulty with breathing are more serious symptoms and require urgent medical
attention.

Revised: September 2025
MA split from NI following AN: 01525/2025
4.6 Adverse reactions (frequency and seriousness)
Immediate allergic reactions have been described in some animals (agitation, tremor,
edema of the udder, eyelids and lips) which can lead to the death of the animals.
4.7 Use during pregnancy, lactation or lay
Do not use this medicinal product in the lactating cows.
The product is intended to be used during gestation. The safety of the medicinal
product in dairy cows during gestation has not been shown. However, the amounts of
cloxacillin absorbed by the intramammary route being low, the use of this drug during
gestation does not pose any particular problem.
4.8 Interaction with other medicinal products and other forms of interaction
The safety of the concomitant use of this medicinal product with other intramammary
medicinal products has not been established, so simultaneous use is discouraged.
4.9 Amounts to be administered and administration route
For single intramammary use
600 mg of cloxacillin i.e. the content of one syringe should be infused once into each
quarter via the teat canal immediately after the last milking of the lactation.
Milk out thoroughly before starting administration. Before administering the medicinal
product, the teats should be thoroughly cleaned and disinfected, and care should be
taken to avoid contamination of the syringe nozzle. Administer the full content of a
syringe in each quarter. Massage after administration. After administration it is
recommended to immerse the teat in an approved disinfectant bath. Do not milk after
treatment.
4.10 Overdose (symptoms, emergency procedures, antidotes), if necessary
No adverse reactions are expected in case of accidental overdose.
4.11 Withdrawal period
Meat and offal: 28 days
Milk: Interval between treatment and calving is 42 days or longer: 4 days after
calving.
Interval between treatment and calving is less than 42 days: 46 days after 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.

Medication costs adding up?

Pet insurance can cover prescription medications. Find the right policy for your pet.

Compare insurance

Find cheaper vets near you

Compare vet consultation prices in your area. Save on procedures and get a prescription to buy medications online.