Hey. I would ask for another med if he doesn't put you back on oxy. My dr last week brought up morphine ir which I didn't even know existed. If your dr is good like mine they'll take your tolerance into consideration. She told me that's our next med cause I have to rotate my breakthru meds every once in awhile. She said she'd dose the morphine high. I'm not sure of any other ir meds. I've only been on Dilaudid and oxy. We wanted Opana ir but my insurance didn't cover it. Silly since they cover my ER. You could try that but oxy is best cause higher oral bio. Dilaudid and Opana have low oral bio so lots of people snort or shoot them. I think snorting has better effect than just chewing cause your blood vessels in your nostrils allow medvto get in your system quicker. I've snorted and chewed my old ms Contins and no difference. I even snorted Dilaudid and some people out here swear by it but I got nothing. I'm happy with my 15mg oxy. Opana ER is reformulated so I can't crush cause oral bio sucks but it does help better than MS Contin. Def switch back to oxy if you can and I wish you luck!!