I have been taking Bunvavail 4.2/.7 buccal film for about a year and I have had much better luck with it than I have with suboxone. However I still have not done too much experimenting with them because I am not sure of the effects, there is not a how lot of info on this formulation I'm wondering about iv use, yes I know that bupe is never really safe to iv without a micron filter but it when careful it can be achieved. On most formulations I will try this but when I touch my bunavail strips they have a distinct plastic feel on the back which makes me think it is unsafe. Ive tried other ROA's like anal administration which was decent, recently ive tried putting the buccal strips under my tounge but I cant see a noticable difference. Really the only for sure thing ive figured with these is folding them like a rectangle and having the letter side facing up can maximize the absorbtion because the medicine is only on one side opposite to the plastic side. Does anyone have any experience with these?