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POM-V Prescription Required

DIB 1.0 g Vaginal Delivery System for Cattle

Active ingredient: Progesterone

Form

Vaginal delivery system

Species

Cattle

Manufacturer

Syn Vet-Pharma Ireland Limited

VMD MA No.

54400/4002

What it's used for

For the control of the oestrous cycle in cycling cows and heifers used in combination with prostaglandin or analogue, including synchronisation of oestrus,...

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

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Paying less for Progesterone

  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

DIB 1.0 g Vaginal Delivery System for Cattle — SPC Details

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

For the control of the oestrous cycle in cycling cows and heifers used in combination
with prostaglandin or analogue, including synchronisation of oestrus,
e.g. of donor and recipient animals for embryo transfer.
For induction and synchronisation of oestrus in fixed time artificial insemination
(FTAI) protocols:
- In cycling cows and heifers: used in combination with PGF2α or analogue.
- In cycling and non-cycling cows and heifers used in combination with Gonadotropin
releasing hormone (GnRH) or analogue and PGF2α or analogue.
- In non-cycling cows, used in combination with PGF2α or analogue and equine
chorionic gonadotrophin (eCG).

Revised: March 2025
AN: 03515/2024 & 03814/2024
Vaginal use.
1.0 g of progesterone (1 device) per animal for 7-9 days (depending on indication).
The following protocols could be used:
For synchronisation of oestrus (including synchronisation of oestrus of donor and
recipient animals for embryo transfer):
- Insert one device into the vagina for 7 days.
- Inject a luteolytic dose of or analogue 24 hours prior to device removal.
- In animals that respond to treatment the onset of oestrus generally occurs within
1-3 days after removal of the insert. Cows should be inseminated within 12 hours of
first observed oestrus.
For the induction and synchronisation of oestrus for Fixed Time Artificial Insemination
(FTAI):
In cycling cows and heifers:
- Insert one device into the vagina for 7 days.
- Inject a luteolytic dose of or analogue 24 hours prior to device removal.
- FTAI 56 hours after removal of the device.
In cycling and non-cycling cows and heifers:
- Insert one device into the vagina for 7- 8 days.
- Inject a dose of GnRH or analogue at device insertion.
- Inject a luteolytic dose of or analogue 24 hours prior to device removal.

Revised: March 2025
AN: 03515/2024 & 03814/2024
- FTAI 56 hours after removal of the device, or
- Inject GnRH or analogue 36 hours after device removal and FTAI 16 to 20 hours
later.
In non-cycling cows:
- Insert one device into the vagina for 9 days.
- Inject a luteolytic dose of or analogue 24 hours prior to device removal.
- Inject eCG at device removal.
- FTAI 56 hours after removal of the device, or inseminate within 12 hours following
first observed oestrus behaviour.
Administration
The device specific applicator should be used for administration, following the
procedure described below:
1. Ensure that the applicator is clean and disinfected using a non-irritant antiseptic
solution before use.
2. Wearing sterile disposable plastic gloves, fold the arms of the device and load
into the applicator. The arms of the device should protrude slightly from the end
of the applicator. Care should be taken to avoid unnecessary or prolonged
handling of the product to minimise transfer of the active substance to the
operator's gloves.
3. Apply a small quantity of obstetrical lubricant to the end of the loaded applicator.
4. Lift the tail and clean the vulva and perineum.
5. Gently insert the applicator into the vagina, first in a vertical direction and then
horizontally until some resistance is encountered.
6. Make sure the removal string is free, press the handle of the applicator and
allow the barrel to move back towards the handle. This releases the arms of the
device, which will then retain the device in the anterior vagina.
7. With the device correctly positioned, withdraw the applicator, leaving the
removal string hanging from the vulva.
8. The applicator should be cleaned and disinfected before being used on another
animal.
Removal
The device may be removed by gently pulling on the string. On occasions the string
may not be visible from the outside of the animal, in such cases it may be located in
the posterior vagina using a gloved finger. Withdrawal of the device should not
require force. If any resistance is encountered a gloved hand should be used to ease
removal.
If there is any difficulty in removal from the animal beyond that itemised above
veterinary advice must be sought.
The device is intended for single use only.

Revised: March 2025
AN: 03515/2024 & 03814/2024
Do not use in sexually immature heifers or in females with abnormal genital tracts
e.g. freemartins.
Do not use in animals presenting with infectious or non-infectious diseases of the
genital tract.
Do not use within the first 35 days after calving.
Do not use in pregnant cattle. See section 4.7
Vaginal discharge associated with local irritation has been observed at removal of the
insert, however, this has not been reported to affect conception rates following
treatment. In target animal safety studies, this discharge was observed to resolve
spontaneously within 7 days of device removal.
The progesterone treatment alone, according to dosage regimen proposed, is not
sufficient to induce oestrus and ovulation in all cycling females. Progesterone based
breeding protocols are reproduction management tools and should not replace
adequate feeding and general health management. The choice of a specific protocol
should be based on the requirements of the individual herd or cow and it is advisable
to examine ovarian activity before using the progesterone treatment.
The response of cows and heifers to progesterone based synchronisation protocols
is influenced by the physiological state at the time of treatment.
Responses to treatment can vary either across herds or across cows within herds.
However, the percentage of cows displaying oestrus within a given period is usually
greater than in untreated cows and the subsequent luteal phase is of normal
duration.

Special precautions for use in animals
Animals in poor condition, whether from illness, inadequate nutrition, or other factors,
may respond poorly to treatment.
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
Progesterone is a potent steroid hormone and may cause adverse effects on the
reproductive system in cases of high or prolonged exposure. Pregnant women
should avoid using this product. The device should be inserted using the product
specific applicator.
Personal protective equipment consisting of gloves should be worn when handling
the veterinary medicinal product during insertion and removal.
This product may cause eye irritation. Avoid accidental contact with the eyes. In
case of accidental ocular exposure, flush the eyes thoroughly with water. Wash
hands and exposed skin with soap and water after use.

Revised: March 2025
AN: 03515/2024 & 03814/2024
None known.
The bag must be re-sealed using the zipper after opening.
horizontally until some resistance is encountered.

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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