I had a quick question.. I was wondering what the average length of duration an insufflated oxy high is, with an average dose of 40 mg. For a while now, I have been having shorter highs, and he thinks its because his tolerance is up. And even when he takes a break, it still doesn't seem to make a difference with the potency or length. Isn't it true that a person who's doing any kind of opiate will develop a tolerance very quickly? How long are the highs usually for you?