In the USA Suboxone (Buprenorphine and Naloxone) clinics much has been learned by the "Street Junkies" on how destroy the Naloxone and free the Buprenorphine.
Street Junkies will feast on Targin because Oxycodone CII is much more potent than Buprenorphine CIII
Only Naltrexone ADTs are truly deterrent with the very long half-life of 4 h (naltrexone), 13 h (6-ß-naltrexol).