POM-V Prescription Required Companion Animal

Betamox LA 150 mg/ml Suspension for Injection

Active ingredient: Amoxicillin

Form

Injection

Species

Cats Cattle Dogs Pigs Sheep

Manufacturer

Norbrook Laboratories Limited

VMD MA No.

02000/4070

What it's used for

In vitro Amoxicillin is effective against a wide range of Gram-positive and Gram- negative bacteria which include: Escherichia coli Klebsiella pneumoniae P...

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 LA 150 mg/ml Suspension for Injection — SPC Details

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

In vitro Amoxicillin is effective against a wide range of Gram-positive and Gram-
negative bacteria which include:
Escherichia coli
Klebsiella pneumoniae
Proteus species
Salmonella species
Staphylococci and
Streptococci
Not effective against beta-lactamase producing organisms.
Suitable for the control of infections due to susceptible microorganisms in cattle,
sheep, pigs, dogs and cats where a single injection giving prolonged activity is
required. It may also protect from secondary bacterial invasion due to sensitive
organisms in cases where bacteria are not the initial cause of the disease.

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AN: 04163/2024Page 2 of 5
Indications include infections of:
(a) Alimentary tract
(b) Respiratory tract
(c) Skin and soft tissue
(d) Urogenital tract and,
(e) In prevention of post-operative infection (treat before surgery).

To ensure the correct dosage, bodyweight should be determined as accurately as
possible to avoid underdosing or overdosing.
Cattle, sheep and pigs - By intramuscular injection only.
Dogs and cats - By subcutaneous or intramuscular injection.
The recommended dosage rate is 15 mg per kg bodyweight, repeatable if necessary
after 48 hours. Massage the injection site.
Shake the vial before use
Swab the septum before removing each dose. Use a dry sterile needle and syringe.
A separate injection site should be used for each administration.
AnimalWeight (kg)Dosage volume (ml)Cattle450 kg45.0 mlSheep65 kg6.5 mlPigs150 kg15.0 mlDogs20 kg2.0 mlCats5 kg0.5 ml
Dose volume is equivalent to 1 ml per 10 kg bodyweight. If dose volume exceeds 15
ml in cattle and 4 ml in sheep and pigs, it should be divided and injected into two or
more sites. As with other injectable preparations, normal aseptic precautions should
be observed as this product does not contain antimicrobial preservative.
An appropriately graduated syringe must be used to allow accurate administration of
the required dose volume. This is particularly important when injecting small
volumes.

Revised: July 2025
AN: 04163/2024Page 4 of 5
If no distinct clinical response is seen after the second treatment, a check of the
diagnosis and eventually a change of treatment are required.

This product is not suitable for intravenous or intrathecal use
This product should not be administered to rabbits, hamsters, gerbils or guinea pigs.
Not for use in known cases of hypersensitivity to penicillins or cephalosporins.

In rare cases, hypersensitivity reactions such as urticaria anaphylaxis shock can

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AN: 04163/2024Page 3 of 5
occur after use. In the case of allergic reactions, treatment should be discontinued
and a symptomatic treatment should be initiated. In very rare cases, local tissue
reactions such as swelling and pruritus may result from the use of amoxicillin.
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)

No special warnings.

Special precautions for use in animals
Use of the product should be based on susceptibility testing of the bacteria isolated
from the animal. If this is not possible, therapy should be based on local
epidemiological information.
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.
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 with breathing, are more serious symptoms and require urgent
medical attention.
Wash hands after use.

It is not generally recommended to use bactericidal and bacteriostatic antibiotics at
the same time.

Do not store above 25ºC.
Protect from light.
Following withdrawal of the first dose, use the product within 28 days. Discard
unused material.
This product does not contain an antimicrobial preservative.

Dose volume is equivalent to 1 ml per 10 kg bodyweight. If dose volume exceeds 15
ml in cattle and 4 ml in sheep and pigs, it should be divided and injected into two or
more sites. As with other injectable preparations, normal aseptic precautions should
be observed as this product does not contain antimicrobial preservative.
An appropriately graduated syringe must be used to allow accurate administration of
the required dose volume. This is particularly important when injecting small
volumes.

Revised: July 2025
AN: 04163/2024Page 4 of 5
If no distinct clinical response is seen after the second treatment, a check of the
diagnosis and eventually a change of treatment are required.
4.10 Overdose (symptoms, emergency procedures, antidotes), if necessary
Penicillins have a wide safety margin.
4.11 Withdrawal period(s)
Cattle:
Meat and offal: 39 days
Milk: 108 hours (4.5 days)
Pigs:
Meat and offal: 42 days
Sheep:
Meat and offal: 29 days
Milk: Not authorised for use in sheep producing milk for human consumption.
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.