POM-V Prescription Required Companion Animal

Betamox 150 mg/ml Suspension for Injection

Active ingredient: Amoxicillin

Form

Injection

Species

Cats Cattle Dogs Pigs Sheep

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/4071

What it's used for

For the treatment of infections caused by a wide range of Gram-positive and Gram-negative pathogenic bacteria including: Actinobacillus equuli Actinomyces...

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 Amoxicillin

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

Betamox 150 mg/ml Suspension for Injection — SPC Details

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

For the treatment of infections caused by a wide range of Gram-positive and
Gram-negative pathogenic bacteria including:
Actinobacillus equuli Actinomyces bovis
Actinobacillus lignieresi Bacillus anthracis
Erysipelothrix rhusiopathiae Bordetella bronchiseptica
Escherichia coli Clostridium species
Haemophilus species species
Pasteurella species species
Proteus mirabilis Moraxella species
Salmonella species
Staphylococci
Streptococci

Revised: December 2025
AN: 02671/2025
Not effective against beta-lactamase producing organisms.

Cattle, sheep and pigs : By intramuscular injection only.
Dogs and cats : By subcutaneous or intramuscular injection.
The recommended dosage rate is 7 mg/kg bodyweight once a day for up to five
days. Massage the injection site.
A separate injection site should be used for each administration.
AnimalWeight (kg)Dose volume (ml)Cattle45020.0Sheep653.0Pigs1507.0Dogs201.0Cats50.25
(Guide-dose volume is equivalent to about 0.25 ml per 5 kg daily).
Normal aseptic precautions should be observed. Shake vial before use. This
product does not contain an antimicrobial preservative. Swab the septum before
removing each dose. Use a dry, sterile needle and syringe.
If dose volume exceeds 20 ml in cattle or 10 ml in pigs, it should be divided and
injected into two sites.

Intravenous or intrathecal use.
Use in rabbits, hamsters, gerbils and guinea pigs.
Use in known cases of hypersensitivity to amoxycillin.

Occasional local tissue reactions may result from use of this product.
Penicillins and cephalosporins may cause hypersensitivity (allergy, allergic skin
reactions) after use. Allergic reactions may occasionally be serious
(anaphylaxis).

Revised: December 2025
AN: 02671/2025
The frequency of adverse reactions is defined using the following convention:
- very common (more than 1 in 10 animals treated displaying adverse
reaction(s))
- common (more than 1 but less than 10 animals in 100 animals treated)
- uncommon (more than 1 but less than 10 animals in 1,000 animals treated)
- rare (more than 1 but less than 10 animals in 10,000 animals treated)
- very rare (less than 1 animal in 10,000 animals treated, including isolated
reports).

None

i. Special precautions for use in animals
None
ii. Special precautions to be taken by the person administering the veterinary
medicinal product to animals
Care should be taken to avoid accidental self-injection. In the case of
accidental self-injection, seek medical advice immediately. 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.
Do not handle this product if you know you are sensitised, or if you have
been advised not to work with such preparations
Handle this product with great care to avoid exposure taking all
recommended precautions.
If you develop symptoms following exposure, such as a 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.

Following withdrawal of the first dose, use the product within 28 days. Discard
unused material.
Do not store above 25ºC.

Revised: December 2025
AN: 02671/2025

Milk for human consumption must not be taken from a cow during treatment.
Milk for human consumption may only be taken after 24 hours from the last
treatment.
Not for use in sheep producing milk for human consumption.
Animals must not be slaughtered for human consumption during treatment.
Cattle may be slaughtered for human consumption only after 18 days from the
last treatment. Sheep may be slaughtered for human consumption only after 10
days from the last treatment. Pigs may be slaughtered for human consumption
only after 16 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.