Reproduction and Contraception

Suprelorin® 4.7mg

Safe and effective long-lasting hormonal implant to chemically castrate dogs as an alternative to neutering

  • Dog
  • Implant

Suprelorin® is a unique, safe and effective hormonal implant for the non-permanent contraceptive for male dogs. Suprelorin® is a safe, biocompatible implant, injected under the skin, which temporarily suppresses testosterone.

Using Suprelorin® provides all of the advantages of castration without the surgery. Placing the implant is as simple as placing an identification microchip. The treatment is reversible and the vast majority of dogs will return to completely normal fertility 12 months after the implant was placed.

Suprelorin® implants are a cylinder of a biocompatible lipid matrix which is broken down by the body to provide a sustained release of the active ingredient, Deslorelin, over time.Suprelorin® has been proven to be very safe. It is usually used where surgery needs to be avoided, or where the dog needs to be able to return to fertility in the future.

Only one Suprelorin® implant is needed, regardless of the size of the dog receiving the implant.

It will take more than a month for the implant to be effective the first time it is used, and so it is necessary to keep the treated dog away from on heat bitches for 4 - 6 weeks after the implant is placed. The implant lasts for at least six month, therefore to avoid any lapse in efficacy, it is recommended to place a new implant every 6 months.

Suprelorin® comes in a box of two implants, each one preloaded in its own sterile single use implanting device.

Suprelorin® must be refrigerated between 2°C and 8°C until it is implanted (do not freeze).

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“The changing landscape of desexing: vasectomy, ovarian sparing spay, non-surgical, or not at all? The current evidence”

Presented by Dr Stuart Mason on 14th October 2020
BVSc (Hons) MANZCVS (Animal Reproduction) Diplomate American College of Theriogenologists
Monash Veterinary Clinic, Melbourne, Australia

Watch Webinar


“Contraception in the Male Dog and Clinical Uses of GnRH Agonists”

Presented by Dr Mary Ontiveros on 12th April 2021 BSc, DVM, Dipl ACT - American Registered Specialist in Animal Reproduction

Watch Webinar

Suprelorin Working Dogs



Suprelorin mode of action
Watch how Suprelorin works to suppress testosterone and fertility


How to implant a dog
Watch how Suprelorin is implanted in a dog


 Watch the lecture “Non-neoplastic & neoplastic disorders linked to desexing in dogs” presented by Dr Michelle Kutzler, DVM, PhD, DACT, Oregon State University, USA, and recorded at Australian Veterinary Association Conference, Perth, May 2019.

Watch Lecture


Available from your local veterinarian.

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Registered pursuant to the ACVM Act 1997, No. A9158
Suprelorin® is available only under Veterinary Authorisation.