Outstanding body of work, I truly appreciate your efforts to elaborate on these issues.  Forgive my oversight if I missed the part discussing what the possible and most probable resolutions are?

After a series of unfortunate musculo-skelital injuries back in the late 90's and a major surgery in the last few years, I had noticed that right flank and shoulder pain was apparent during use of opiates (Vicodin, Dilaudid, Moraphone).  I am going to assume that Bile flow being affected is the antagonist for constipation during use of opiates (in addition to other changes in the GI system).  I further am assuming that the accompanying diarrhea that occurs after opiate use might be due to a rebound effect by the GB.  

Assuming that these issues are in play, some years after opiate use, I now continue to experience phenomena including right flank pain, constipation, and extreme intestinal gas.  

My GP did perform the abdominal test, and has referred me to have an ultrasound (which came back negative for stones) and for a HIDA scan which is upcoming. 

I only wish to prepare myself for the eventual assertion that I will be diagnosed with GB dysfunction and removal be recommended, this I have two points I would like you to expound on if possible:

I would like to know appropriately and eloquently what to say, and how to say to my Gastro Dr. that there should be another course of action other than removal of the GB (assuming no structural abnormalities are detected during HIDA.)  

I furthermore would like to know if the tonality and action of the Spinkter of Oddi and accompanying structures do return to their original tonality after discontinuation of opiate use (both chronic and occasional).

Thank you so much for your time and consideration.