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POM-V Prescription Required Companion Animal

Cosacthen 0.25 mg/ml Solution for Injection for Dogs

Active ingredient: Tetracosactide

Form

Injection

Species

Dogs

Manufacturer

Dechra Regulatory B.V.

VMD MA No.

50406/5034

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 Tetracosactide

  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

Cosacthen 0.25 mg/ml Solution for Injection for Dogs — SPC Details

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

Administer 5 µg/kg (0.02 ml/kg) by intravenous or intramuscular injection, with the
purpose of performing the ACTH stimulation test. Take the first blood sample
immediately prior to administering the veterinary medicinal product, and take the
second blood sample between 60 and 90 minutes after administration of the
veterinary medicinal product, to assess the cortisol response.
To ensure a correct dosage, body weight should be determined as accurately as
possible.
Do not use in pregnant animals, see section 3.7.
Do not use in cases of hypersensitivity to the active substance or to any of the
excipients.
Dogs:
Common
(1 to 10 animals / 100 animals
treated):
VomitingUncommon
(1 to 10 animals / 1,000 animals
treated):
Injection site bruising
a
, Injection site haematoma
b
Depression
Diarrhoea
Lameness
Nervousness
a
After intramuscular administration.
b
After intravenous administration.
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.
None.

Special precautions for safe use in the target species:
The safety of the veterinary medicinal product has not been established in dogs
under 5 months of age or weighing less than 4.5 kg.
Safety of the veterinary medicinal product has not been established in dogs with
diabetes mellitus or hypothyroidism.
Use only according to the benefit-risk assessment by the responsible veterinarian.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
Tetracosactide can cause hypersensitivity in people, particularly those with existing
allergic disorders, such as asthma. People with such allergic disorders, or a known
hypersensitivity to tetracosactide, ACTH or any of the excipients, should avoid
contact with the veterinary medicinal product. If you develop clinical symptoms
following exposure, such as skin reactions, nausea, vomiting, oedema and dizziness,
or any signs of anaphylactic shock, you should seek medical advice immediately and
show the package leaflet or label to the physician.
Wash hands after use.
Tetracosactide has not been tested in reproductive or developmental toxicity studies,
but the pharmacological effects on the hypothalamic-pituitary-adrenal axis can have
adverse effects in pregnancy. Therefore, the veterinary medicinal product should not
be administered by pregnant women.
In case of accidental self-injection, 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.
Before performing an ACTH stimulation test, ensure that a sufficient wash-out period
has elapsed since the administration of any medicinal product which may either
cross-react with the cortisol assay, or have an effect on the hypothalamic-pituitary-
adrenal (HPA) axis.
The HPA axis may be affected by medicinal products which either interact with
glucocorticoid receptors, or which affect the pathways involved in the synthesis and
release of cortisol from the adrenal gland.
Store in a refrigerator (2 °C – 8 °C).
Keep the vial in the outer carton in order to protect from light.
Not applicable.
4.

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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Same active ingredient

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These products share the same active ingredient and may be suitable alternatives. Always consult your vet.

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