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POM-V Prescription Required Companion Animal

Synulox Palatable Tablets 400 mg/100 mg

Active ingredients: Amoxicillin, Clavulanic Acid

Form

Tablet

Species

Dogs

Manufacturer

Zoetis Belgium S.A.

VMD MA No.

60021/3098

What it's used for

- Soft tissue infections (including anal sacculitis and abscesses). - Urinary tract infections. - Respiratory infections. - Intestinal infections. - Period...

Full indications, dosage and side effects ↓
View official SPC (PDF)

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Paying less for Amoxicillin + Clavulanic Aci...

  1. 1

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    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

Synulox Palatable Tablets 400 mg/100 mg — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.

- Soft tissue infections (including anal sacculitis and abscesses).
- Urinary tract infections.
- Respiratory infections.
- Intestinal infections.
- Periodontal infections in addition to mechanical or surgical periodontal
therapy.
Dosage: 10 mg amoxicillin and 2.5 mg clavulanic acid/kg body weight every
12 hours.
In refractory respiratory tract infections, the dose can be doubled to 20 mg
amoxicillin and 5 mg clavulanic acid/kg body weight every 12 hours and the
treatment can be prolonged for up to 10 days.
Dosing instructions:
Body weight
(kg)
Number of tablets every 12
hours (10 mg amoxicillin
and 2.5 mg clavulanic
acid/kg body weight)
> 10 – 200.5> 20 – 401> 40 – 601.5> 60 – 802
Duration of treatment:
In most of the cases, a treatment duration of 5 to 7 days is sufficient.
For chronic cases, a longer course of therapy may be required.
Based on clinical trials, the following treatment durations are recommended:
Chronic skin infections, 10–20 days.
Chronic cystitis, 10–28 days.
Instructions for use:
To ensure a correct dosage, body weight should be determined as accurately
as possible.
The tablets can be administered directly into the mouth of the animals or
crumbled and added to a small quantity of food and fed immediately.
Do not use in rabbits, guinea pigs, hamsters, gerbils, chinchillas or other small
herbivores.
Do not use in cases of hypersensitivity to the active substances, other
substances of the beta-lactam group or to any of the excipients.
Do not administer to horses or ruminating animals.
Do not use in animals with severe renal impairment with anuria or oliguria.
Dogs:
Common
(1 to 10 animals / 100 animals
treated):
gastrointestinal disorder
(e.g. vomiting,
diarrhoea)
Uncommon
(1 to 10 animals / 1 000 animals
treated):
hypersalivation
anorexia
,

lethargy

Very rare
(<1 animal / 10 000 animals
treated, including isolated reports):
hypersensitivity reaction
(e.g. allergic skin
reaction, anaphylaxis)
Depending on the severity of the adverse event treatment should be
discontinued and symptomatic treatment initiated based on the benefit-risk
assessment by the responsible veterinarian.
May be serious. Immediate discontinuation of the veterinary medicinal
product is required. Countermeasures to be taken in case of an allergic
reaction:
-
-
Reporting adverse events is important. It allows continuous safety monitoring
of a veterinary medicinal product. Reports should be sent, preferably via a
veterinarian, to either the marketing authorisation holder <or its local
representative> or the national competent authority via the national reporting
system. See the package leaflet for respective contact details.
Cross-resistance has been shown between amoxicillin/clavulanic acid and
other antibiotics belonging to the beta-lactam group. Use of the veterinary
medicinal product should be carefully considered when susceptibility testing
has shown resistance to other antimicrobials in the beta-lactam group because
its effectiveness may be reduced.
The veterinary medicinal product has no effect against infections caused by
Pseudomonas spp. due to its inherent resistance.

Special precautions for safe use in the target species:
Use of the product should be based on identification and susceptibility testing
of the target pathogen(s). If this is not possible, therapy should be based on
epidemiological information and knowledge of susceptibility of the target
pathogens at local/regional level.
Use of the product should be in accordance with official, national and regional
antimicrobial policies.
An antibiotic with a lower risk of antimicrobial resistance selection (lower
AMEG category) should be used for first line treatment where susceptibility
testing suggests the likely efficacy of this approach.
Narrow spectrum antibiotic therapy with a lower risk of antimicrobial
resistance selection should be used for first line treatment where susceptibility
testing suggests the likely efficacy of this approach.
Pharmacokinetic of the active substances in the target tissue might be
considered as well.
The routine use of systemic antibiotics for intestinal infections is not
recommended.
Oral treatment with antibiotics can result in disturbance of gastrointestinal
flora, especially in case of long-term treatment.
In case of renal or hepatic insufficiency, the use of the veterinary medicinal
product should be subject to a benefit-risk assessment by the responsible
veterinarian.
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
can lead to cross-reactions with cephalosporins and vice versa. Allergic
reactions caused by these substances may occasionally be serious.
People with known hypersensitivity to the active substance should avoid
contact with the veterinary medicinal product. Wear gloves when handling this
product to avoid skin contact.
If you develop symptoms such as a skin rash and persistent eye irritation after
exposure to the veterinary medicinal product, seek medical advice
immediately and show the package leaflet or label to the physician. Swelling
of the face, lips, or eyes, or difficulty breathing are more serious symptoms
that require urgent medical attention.
Wash hands after use.
To prevent children from accessing the veterinary medicinal product, only the
required number of tablets should be removed from the blister pack and only
when required. Store any unused portion of the tablet in the opened blister
pack and return it into the carton immediately after use. The carton should be
stored out of the sight and reach of children. In case of accidental ingestion,
seek medical advice immediately and show the package leaflet or the label to
the physician.
Special precautions for the protection of the environment:
Not applicable.
interaction
The bactericidal effect of amoxicillin may be inhibited by the concomitant use
of bacteriostatic antimicrobials.
Penicillins may increase the effect of aminoglycosides.
Do not store above 25°C.
Store in a dry place.
Store any remaining half tablet in the blister kept in the original carton.
Not applicable.

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.

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