I keep my doses at the same time each day, and when I wanted to take lower amounts I would just reduce the dose that I took at that same time. So, my body always expects a dose at midnight or noon, it just gets lower as I taper. It took around two weeks for my body to get used to only dosing every 12 hours. However, I am no longer tapering. I am done for now. I know what my pain is like without pills as I did not get on them right away, I waited 2 years in hell. I'm not all that concerned about seeing that it's just as bad as before. I only dose twice a day, and this has made it straightforward for me to taper, as I am keeping one variable (dose time) constant while altering the other variable (dose) instead of both. Especially because with percocet I can drop by 2.5mg if I want since they are scored and do it slowly.
Then there is Squeaky with his more frequent but lower dosing that is working out great too. That's a good method because you always have a dose in the near future to look forward to and keep you going. There are so many ways of doing this and you have to find out what works best for you. My body likes it best when it expects a dose at a specific time of day, but only dosing twice a day so that I do not have the pills on my mind very often.
Poke mama, I think it is going to be tougher for you to switch from sniffing oxymorphone to taking it orally, than to taper your oxy's. i'd maybe keep taking the oxycodone like you normally do, and focus on the oxymorphone. If you can cut them in half, you could start out by sniffing 3/4 of the oxymorphone daily dose one day, and taking the other 1/4 of it orally. Then, gradually start to take 1/2 orally and 1/2 sniffed for a few days... then 3/4 orally and 1/4 sniffed. Then all oral. Perhaps, for 2 days each time before moving down, so that would be 8 days. That is just an idea... I have no idea really how you have been tapering, but I feel like that could work. I have never even seen an oxymorphone pill before though.
Days 1,2: 15mg oxymorphone insufflated; 5mg oxymorphone oral
Days 3,4: 10mg oxymorphone insufflated; 10mg oxymorphone oral
Days 5,6: 5mg oxymorphone insufflated; 15mg oxymorphone oral
Days 7,8: 20mg oxymorphone oral
That is for total daily dose... it would depend on how you want to do it. Probably easiest to take all your oxymorphone for the day all at once... if you did it 12 hours apart, for example, you would have to sniff 7.5mg oxymorphone on days 1 and 2, and 2.5mg orally, 12 hours apart which I don't think you could do with your pills. So I would just dose the oxymorphone all at once in the morning maybe (getting it over with, no further temptation), and then take your oxycodone later on in the day once it wears off, oxy's spread out like you usually do or to make the withdrawal symptoms least unbearable. That part is harder for me to say, because I don't really know how long oxymorphone lasts, or how strong it is compared to oxycodone. Once it wears off... like say 6 hours later... then you would have 18 hours left in the day to take your 45mg oxycodone. So you could dose one 15mg pill every 6 hours or something, after waiting 6 hours post oxymorphone.
I am on coke right now and just full of brilliant ideas so yeah... there is my coked out idea for you... if it even makes any sense. Didn't fuck with my oxy's today, but played guitar for hours upon hours, restringed my guitar, learned musical theory, and now I am just resting because I remembered that I have back pain. I cannot seem to shut up. It is a good thing, I guess, that I do not like stimulants as much. Way too much anxiety and paranoia for me, and a shitty comedown, but this has still been a very productive day. I have not been able to concentrate on my music like that in ages.