MSD Chorulon 1500iu 5 pack

Chorulon 1500iu 5 pack

£64.50 ex VAT£77.40 inc VAT

Type: POM-V

PLEASE NOTE: A prescription issued by a UK registered vet (MRCVS) is required before this item can be dispatched.

in stock In stock



You may also need:
Farmers Medicine Records Book
Farmers Medicine Records Book
£7.42 ex VAT£8.90 inc VAT

Product Description

Chorulon can be used in the following fertility problems in animals:

  • cases of repeated failure of conception in cows and heifers
  • induction of ovulation in mares and bitches
  • cases of cystic ovaries in cows and heifers
  • anoestrus in mares and bitches
  • delayed ovulation, prolonged pro-oestrus in bitches
  • deficiency in libido in male dogs

Dosage & Administration

Reconstitute with the solvent provided, ensuring the freeze-dried plug is fully dissolved. Administer by intramuscular or intravenous injection, observing the usual aseptic precautions.

Cow and heifer:

Repeated failure of conception: 1500 IU - i.m. or i.v. at AI or mating.

Cystic ovarian disease (anoestrus, prolonged oestrus, nymphomania): 3000 IU - i.v.

Enhancement of luteal function: 1500 IU i.m. 12 days after insemination or mating.


Suboestrus (follicles > 2 cm in diameter): 1500 – 3000 IU - i.m. or i.v., repeat after 2 days if necessary.

Induction of ovulation: 1500 – 3000 IU - i.m. or i.v 24 hours before AI or mating.


Anoestrus: 500 IU - i.m. or i.v. at first day of oestrus after pre-treatment with PMSG 20 IU/kg s.c. daily for 10 days.

Delayed ovulation, prolonged pro-oestrus: 100 - 800 IU/day - i.m, repeating treatment until vaginal bleeding disappears. Mate on behavioural oestrus.

Male dog:

Deficiency in libido: 100 -500 IU - i.m. twice weekly for up to 6 weeks, but if this is not possible then 100 – 500 IU i.m. 6-12 hours before mating may give a temporary effect.

Further information

The product has been used in cases of cryptorchidism in the dog prior to castration (100-500 IU i.m. twice weekly for up to 6 weeks). Treatment may be effective in some cases provided that the inguinal canal is patent, and that therapy commences early.

The product has intrinsic LH-like activity. Injection of 1500 IU 12 days after heat in cattle enhances the active life of the corpus luteum by 2 to 3 days, resulting in increased progesterone and suppression of oestradiol production. These changes are consistent with those observed after GnRH use at day 11-13 of the cycle which are believed to be responsible for the increased pregnancy rates seen after such use. The mode of action is however different, since the product does not rely on first stimulating an endogenous LH peak. This use of the product has not been investigated in the field.


Zero days

Data Sheet

To know more about this product please click on the link below...

Chorulon 1500iu


Delivery & Returns

With the Farmacy business moving from West Sussex to Cheshire over the Christmas and New Year break, we will be closed from midday on Friday 22nd December. Nothing will then be dispatched from that date until 2nd January 2024.

This makes it more important than ever to plan your ordering to ensure you are covered. For last delivery dates for Pre-Christmas delivery click here.





Non-refrigerated items

By 6pm


Refrigerated items

By 12am

£0 - £149.99



£150 - £299.99



£300 - £449.99



£450 or more



Delivery to United Kingdom only

Please note there is a small excess for despatch to Highlands and Islands and Isle of Wight as governed by your postcode.

  1. To keep our prices as low as possible, we do not hold stock of most products. We order stock from our wholesaler at 4.30 each day, so any orders received after this time will not be ordered until the following day. 
  2. Orders placed on a Thursday or Friday that have refrigerated items included will not be dispatched until the following Monday to ensure that the items are delivered to you under controlled conditions. This means that you should receive these items on a Tuesday by 12pm.
  3. We do not offer a Saturday or Sunday delivery service.
  4. Standard and Priority costs apply to the UK mainland only.
  5. Delivery to Scottish Highlands and Islands and Isle of Wight may incur an excess to cover additional carriage costs - this is dependent on your postcode. Full details can be found by clicking the link below.
  6. Customers who arrange to collect from Warnham should not arrive before 12pm.
  7. We are no longer able to ship to Northern Ireland due to extra administrative costs since January 2021. Any orders placed online will be cancelled and refunded.

For full delivery details click here 

Faulty Goods Returns

In the unlikely event that you receive faulty or damaged goods please call 01306 628215 within 72 hours of receipt of your goods. Please have your order reference to hand. You will be asked to provide evidence of the damaged goods if damaged in transit.

Restricted Goods Returns

We are unable to offer refunds on the following products.

  • Animal medicines - general & vaccines
  • Refrigerated/temperature sensitive products

Please contact the Farmacy Team before sending any returns on 01306 628215.

For full returns details click here

Product Species

  • Cattle - Dairy
    Cattle - Dairy
  • Cattle - Beef
    Cattle - Beef
  • Horses
  • Dogs
Home Delivery

UK mainland delivery from £8.00

Reward Points

Earn up to 64 reward points with this product.

You Can Also...

Get help or write a review...

ask a questionwrite a reviewprint this page