Your situation has lots of issues to consider. I'd like to know more about how your doctor intends to use suboxone to help you. It is effective as an opiate replacement. It comes without the euphoria and respritory depression that full agonist opiates have but suboxone is still highly addictive. It can be very hard to stop using it. Getting off can be nearly impossible if not done properly. You also have some other medical conditions that may respond well to suboxone now but in a negative way later, like anxiety and depression. If you decide at some point that suboxone is no longer a benefit to you, you're facing a tough task getting off of it. Using suboxone also complicates surgery as it blocks the effects of many drugs used as anesthesia.
I was taking around the same dose of oxy as you for over 8 years. I tried to wean down, but it just got ridiculous---I felt like i was just drawing out the w/d process, so I just jumped. I'm 53, was 52 and it was no picnic.
I didn't take any drugs to help me except Clonidine (prescribed by my doctor for BP spikes) and I also have always taken Gabapentin for nerve pain.
It was 2 weeks of feeling like the worst flu I ever had, but at 14 days I turned a BIG corner. I just celebrated 8 months.
This is what helped me:
1. Lots of water. An ounce for every pound you weigh/every day. So if you weigh 128 lbs, that's one gallon of water a day.
2. Bland foods. Protein shakes upset my tummy a lot. I stuck to ramen noodles, piping hot beef broth, crackers, ginger ale.
3. Hot Showers (I can't take baths; long story)...I must have taken 4 a day.
4. Exercise: any kind of moving will make you feel better.
5. Sunshine.
Hang in there, it's not easy, but definitely doable....Stick around and keep posting!!!