Psychiatrymiddle twist
A 47-year-old man completed inpatient alcohol withdrawal and has been abstinent for eight days. He wants medication to help him stay off alcohol and is attending weekly counselling. He weighs 92 kg. He takes slow-release oxycodone twice daily for pain from a crush injury to his foot, which is expected to continue indefinitely. He lives alone and has nobody who could watch him take a daily tablet. Serum creatinine is 78 micromol/L (60 to 110). Which one of the following drugs is most appropriate?