I too mix OTC medication (benadryl) with my prescribed meds. I also take my prescribed medication early, so I am basically taking two doses at once. I know I need to tell my doctor and my therapist. It will be hard because I don't want to stop what I'm doing and I am afraid my therapist and/or doctor will say my parents need to handle my medications again. But, as I pondered your post I thought maybe I need to tell them I'm in so much pain I'm abusing my medications. I guess that's my gentle advice to both you and to myself.