I think you are over anylizing this

I take mine (Vicodin) when I need it. That's it. No schedule, no stress. Sometimes I need it when I wake up. Other times I need it after work. At times I need it when I wake up in the night. On bad days, I need it both morning and night if I've had an exceptionally physical day. Sometimes I break it in half...other times I take the whole thing. Sometimes I add Zanaflex and Celebrex...occassionally I add a beer

I just take it when I need it. I think if you ask your doctor about this, he'll agree. It's not about a schedule...it's about need. Take what you need when you need it and don't worry about it....

Hope this helps