POM-V Prescription Required Companion Animal

Oxytocin-S, 10 iu/ml, Solution for Injection

Active ingredient: Oxytocin Synthetic

Form

Injection

Species

Cats Cattle Dogs Goats Horses Pigs Sheep

Manufacturer

Intervet International B.V.

VMD MA No.

06376/4084

What it's used for

Injections with this product will initiate strong, regular and purposeful contractions of the uterine muscle especially in the later stages of pregnancy an...

Full indications, dosage and side effects ↓

View official SPC (PDF)

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Paying less for Oxytocin Synthetic

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.

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Prescription required

Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.

Clinical information

Oxytocin-S, 10 iu/ml, Solution for Injection — SPC Details

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

Injections with this product will initiate strong, regular and purposeful
contractions of the uterine muscle especially in the later stages of pregnancy
and post-partum. It also evokes the 'let-down' of milk although it has no action
on the smooth muscles of the gut or urinary bladder, nor is it effective in the
treatment of diabetes insipidus. The absence of vasopressor and antidiuretic
effects make it particularly suitable for obstetric use (stimulation of parturition,
promotion of uterine involution and control of post-partum haemorrhage) and
the treatment of agalactia.
The product is indicated for:
- stimulation of uterine contraction to facilitate parturition in the presence of a
fully dilated cervix
- to promote involution of the post-parturient uterus and thus aid the passage of

Revised: December 2024
AN: 00713/2024
retained placenta
- to aid in control of post-partum haemorrhage
- promotion of milk 'let-down' in cases of agalactia and to facilitate ‘stripping
out’ of infected quarters in the treatment of mastitis in cows.

The product should normally be given by deep intramuscular injection.
SpeciesDosagemlsQueen2-5 iu0.2-0.5 mlBitch2-10 iu0.2-1.0 mlEwe, goat, sow2-10 iu0.2-1.0 mlMare10-40 iu1.0-4.0 mlCow
Indications other than mastitis
as listed in section 4. For
mastitis treatment see below.
10-40 iu1.0-4.0 ml
Adjunct to mastitis treatment in cows:
A single dose of up to 80 iu (8 ml) prior to stripping out before first mastitis
treatment followed by repeated doses of 20 iu (2 ml) prior to each stripping out 2
or 3 times daily while mastitis treatment continues.
Where the intravenous route is used, these doses should be reduced to one-
quarter of the intramuscular dose and the injection given slowly at a dilution of 1
in 10 Water for Injections Ph.Eur. Where speed of onset is not a priority, the
product may be given by the subcutaneous route.
A low initial dosage is recommended by any route as repeat administration is
permissible.
Large doses may be employed in post-parturient animals.

1. When the product is used as an aid to parturition, cervical dilation must
be confirmed prior to administration to prevent the risk of foetal death
and possible uterine rupture.
2. The product is contraindicated in any form of obstructive dystocia.
3. Excessive doses of the product may delay parturition by producing
incoordinated uterine contractions which interfere with the progress of
the foetus especially in multiple pregnancies.
4. The effects of daily dosages of 100 iu or more (to facilitate ‘stripping
out’ of infected quarters in the treatment of mastitis in cows) on the
oestrous cycle have not been fully investigated and the cycle length
may be altered.
5. Adrenaline at physiological levels markedly reduces the effect of
oxytocin on the uterus or mammary gland. For this reason, the animal
should not be frightened when complete oxytocin effect is desired to
cause either milk 'let down' or uterine contractions.

None known

Revised: December 2024
AN: 00713/2024

the person administering the medicinal product to the animals
i. Special precautions for use in animals
Use aseptic precautions.
ii. Special precautions to be taken by the person administering the veterinary
medicinal product to animals
Pregnant or lactating women should avoid handling the product as it could
cause smooth muscle (e.g. uterine) contraction.
When administering the product, care should be taken to avoid accidental
self-injection.
In case of accidental self-injection, seek medical advice immediately and
show the package leaflet or the label to the physician.

Stimulation of beta-adrenergic receptors may reduce the effect of oxytocin on the
uterus or mammary gland.

Store in a refrigerator (between +2
o
C and +8
o
C). Protect from light.

Revised: December 2024
AN: 00713/2024

For the full list of excipients, see section

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.