In an oral dosage form with delayed release, comprising morphine or a physiologically acceptable salt thereof and naloxone or a physiologically acceptable salt thereof, for oral substitution therapy for opioid-dependent subjects the dosage form comprises 0.5 to 2 mg of naloxone per 100 mg of morphine.在一種緩釋口服劑中包含嗎啡或其生理學可接受之鹽及那若松(naloxone)或其生理學可接受之鹽,其係用於類鴉片依賴對象之口服替代療法,該口服劑中每100mg之嗎啡包含0.5至2mg之那若松。