I Attend Act, Which Is A Clinic For Drug Addiction

I attend act, which is a clinic for drug addiction and treatment. I am prescribed methadose (30mg) which is alot lower then at the 108 that I was prescribed at a year befor. But I find that even now at 30, it seems to be taking a toll on me. I feel tired almost all day, even if I have a great night sleep. Im thinking maybe depression. Is there any anti depressants that can be taken with methadose.
Thanks, Misty.