Sorry not to answer sooner Scott. In brief, yes I have seen lots of folk with hip pain from their back and others with hip pain from their hips, and yet others (like myself) who have a combination...there is a tricky overlap. Rule of thumb is not to assume all pain is related to arach.: any persistent new pain should be fully checked out.
On the meds: quite a hefty mix, watch the methadone, it can act unpredictably.
Take care
DocSarah