I’m in the process of weaning myself off oxycodone utilizing THC & CBD combo. It’s taken me a year to figure out a formula that works for me. I started with high THC and low CBD but did not get desired effect. Now I’ve pretty much switched my amounts to high CBD and low THC and I think I’ve got it. I’m down to one pill every other day. But as winter approaches and my OA ramps up from cold I’ll have to see what adjustments are needed. Since you have bad lungs consider tinctures of pills if available to you. Good luck.