/b/veterinary-nursing-news/posts/medical-castration-for-cats-is-now-an-option Virbac has announced that Suprelorin 4.7mg Implants for Dogs, the reversible alternative to surgical castration, is now licensed for use in male cats. Suprelorin 4.7mg is a sustained release implant containing deslorelin (a GnRH super agonist) whichen-USTelligent Community 10