Well Opana's got a pretty damn short half life, isn't it like top end 2.5 hours, well shorter than oxycodone's or heroin(morphine)'s half lives. Unless you are eating the Opana, but I somehow doubt that. Also the person's tolerance really plays a big role in PWD, I can take Subs as early as 10 hours after H, I prefer to wait 12 at least. But I snort and I have always managed to get my habit down around .75 g a day of decent but not great stuff.
opana's half life is anywhere from from 7-10 hours, if im not mistaken. its a fairly long lasting opiate, actually. at least for me personally. it is surely longer than oxycodone. about 74% of the time i use opana, 24% i use H and 2% is miscellaneous opiates. so i have experience with taking suboxone after all sorts of opiates..
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