New tool for substance use disorder management Expositor Staff Oct 30, 2019 - 4 min read With a Probuphine implant, matchstick-sized rods are placed just beneath the skin of the inner arm. With a Probuphine implant, matchstick-sized rods are placed just beneath the skin of the inner arm. This post is for paying subscribers only Subscribe now and have access to all our stories, enjoy exclusive content and stay up to date with constant updates. Subscribe now Already a member? Sign in