If already in withdrawal from oxycodone, can i take the suboxone without gettin precipitated wd even if it's only been 15-17hrs since last dose of oxy?

Most likely: officially, you need to wait at least 24 hours. Practically, many people do it and even earlier. Legally, you need to do it in the presence of your doctor. Practically, if you are sweating, have muscle cramps, goosebumps, diarrhea – you can do it. Just start with a very small piece of the film to test if you are not precipitating further problems. good luck. Get treatment.