Methadone Hydrochloride and edema

Been on Methadone tabs for 9 yrs. I gained 130 lbs, have edema in my ankles and feet for the past 8 yrs, I have an endocrine problem (pituitary gland doesn't produce testosterone anymore), I'm itchy all over, I get drowsy, and I have hot flashes. I think I should get off this drug and deal with my chronic pain. At least I'll lose wieght, stop itching, lose the edema and aching feet, maybe restore my endocrine system balance, etc....
Whata ya think?

I take many medications for different ailments. I started to have severe edema of feet, ankles, legs, thighs, and also face. I was precribed, depakote, lipitor, i cannot remember the name of the next one, but it was in addition to pepcid, and then methadone, all within 3 months of each other. The vicodin was discontinued at the same time the methadone was prescribed for chronic pain. In addition to this massive water retention, I also am having a difficult time voiding. I have Interstitial Cystitis and need to void every 10 minutes, so it is imperative that I can void easily. So two possible side affects, generalized edema and difficulty voiding. I take the methadone for severe chronic pain. And it or something elso has become a pain.