I have been going between using at first oxy and more recently 30 mg fake press fentanyl pills and being on Suboxone over the past 8 months. Things have gotten quite tricky with the use of these pressed fentanyl pills since I know I need to wait at least 72 hours to induce Suboxone. While on Suboxone, I still have cravings to use, which always ultimately leads me back to using.