Cartaxx 50 mg/ml Solution for Injection for Dogs and Cats
Active ingredient: Carprofen
Form
Injection
Species
Manufacturer
Alfasan Nederland B.V.
VMD MA No.
36408/3038
What it's used for
Cat: for the control of post-operative pain following surgery.
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Paying less for Carprofen
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Prescription required
Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.
Cartaxx 50 mg/ml Solution for Injection for Dogs and Cats — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.
premedication or induction of anaesthesia.
Dog:
The recommended dose is 4 mg carprofen/kg bodyweight (equivalent to 1 ml of the
veterinary medicinal product/12.5 kg bodyweight).
To extend analgesic and anti-inflammatory treatment post-operatively, parenteral
therapy may be followed after 24 hours with carprofen tablets at 4 mg/kg/day for up
to 5 days.
Cat:
The recommended dose is 4 mg carprofen /kg bodyweight (equivalent to 0.08 ml of
the veterinary medicinal product/1.0 kg bodyweight).
Due to the longer half-life in cats and narrower therapeutic index particular care
should be taken not to exceed or repeat the recommended dose and the use of a 1
ml graduated syringe is recommended to measure the dose accurately.
The parenteral therapy may not be followed with carprofen tablets.
The stoppers should not be broached more than 30 times.
gastrointestinal problems, where there is a possibility of gastrointestinal ulceration or
bleeding.
Do not use in cases of hypersensitivity to the active substance or any other non-
steroidal anti-inflammatory drugs (NSAIDs) or any excipients of this veterinary
medicinal product.
Do not administer by intramuscular injection.
Do not use after surgery which was associated with considerable blood loss.
Do not use in cats on repeated occasions.
Do not use in cats less than 5 months of age.
Do not use in dogs less than 10 weeks of age.
Do not use during pregnancy and lactation, see also section 3.7.
Rare
(1 to 10 animals / 10,000
animals treated):
Digestive tract disorder: loss of appetite, vomiting,
gastric-intestinal ulceration, loose stool, blood in
faeces (occult), diarrhoea
1,2
Renal disorder.
Hepatic disorder (idiosyncratic).
Injection site reactions
Undetermined frequency
(cannot be estimated from the
available data)
Lethargy.
1,2
Anaemia.
in most cases transient and disappear following termination of the treatment but in
very rare cases may be serious or fatal.
If adverse reactions occur, use of the veterinary medicinal product should be
stopped and the advice of a veterinarian should be sought.
following subcutaneous injection
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.
Special precautions for safe use in the target species:
Do not exceed the recommended dose or duration of treatment.
Use in aged dogs and cats, may involve additional risk. If such use cannot be
avoided, such animals may require a reduced dosage and careful clinical
management.
Avoid use in dehydrated, hypovolaemic or hypotensive animal, as there is a potential
risk of increased renal toxicity.
NSAIDs can cause inhibition of phagocytosis and hence in the treatment of
inflammatory conditions associated with bacterial infection, appropriate concurrent
antimicrobial therapy should be instigated.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals:
Carprofen, in common with other NSAIDs, has been shown to exhibit
photosensitising potential in laboratory studies. Benzyl alcohol may cause
hypersensitivity (allergic) reactions. People with known (hyper)sensitivity to
carprofen, NSAIDs or benzyl alcohol should administer the veterinary medicinal
product with caution. Avoid contact with skin. Wash off any splashes immediately
with clean, running water. Seek medical attention if irritation persists.
Take care to avoid self-injection. In case of accidental self-injection, seek medical
advice and show the package leaflet or the label to the physician.
Special precautions for the protection of the environment:
Not applicable.
NSAID, or in conjunction with glucocorticosteroids. Carprofen is highly bound to
plasma proteins and may compete with other highly bound drugs which can lead to
toxic effects. Hence, concurrent administration with potentially nephrotoxic drugs
should be avoided.
This veterinary medicinal product does not require any special temperature storage
conditions.
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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Related Conditions
Other Products Containing Carprofen
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Canidryl 100 mg Tablets for Dogs
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Carpcoat 40 mg Film-coated Tablets for Dogs
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Carpcoat 8 mg Film-coated Tablets for Dogs
POM-VAlfasan Nederland B.V.
Carpcoat 80 mg Film-coated Tablets for Dogs
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