My Son Was Released From The Hospital 1 Week From

My son was released from the hospital 1 week from a detox program. He seems to becoming anxious and maybe some cravings. We are trying to find long term inpatient care which is difficult. Long waiting lists. I am afraid he may relapse. They sent him home taking Fluoxetine HCL 20 mg and Hydroxyzine PAM 100 mg. Is there anything we can do while we wait?