This is too dangerous. I don't think anyone will be offering much help here. Even if you could, there's no easy way of measuring out a safe dose. Fentanyl
is waaay too potent.
If swiy's tolerance is THAT high, maybe swiy should consider some options to lower it. I always wondered how high opiate
tolerance would react to a regimen of naltrexone for a week or two. Maybe it could reset some of that tolerance? I've read some interesting reports that suggest it could work well.
EDIT: I just want to be clear. No one should be posting any information or suggestions on how to get something capable of being IVed from a fentanyl patch. It doesn't matter if the OP knows exactly what s/he is doing or has a whole team of EMT's and medical doctors present. Thousands of people view this forum and posting a how-to on making a fentanyl IV solution is way too dangerous. Some idiot out there will read it, have no clue what they are doing, and end up ODing. This is a harm reduction
site. Something that dangerous doesn't belong here.