Some habit forming drugs

I was assigned to a patient who has just undergone an internal cardiovert defibrillator. Among his “as needed” medications are pain killers and antianxiety drugs. However, the medications might have given him this habit forming dependence that there is not a day that has passed that he did not pop these pills. His daughter has talked to his attending consulting him about the possibility of having him a residential rehab that is not obvious to the patient.