i agree with the last thing you said- i dont think any one reading this who doesnt have much of an opiate tolerance should try to do that much in one sitting. (whole patch)
fentanyl is really dangerous, and it really shouldnt be used at all if someone doesnt have a tolerance, as the margins for error are far too slim. if you are going to try it anyway, take it really slow. using very very small strips of a patch work (if it is not gel) if you suck on them, but when swallowing them you have no way if you are taking too much. at least if you just leave it in your mouth yo ucan controll it a lot better, taking it out, using a smaller piece etc. if you have gel smoking works too, but again start with a very small pinhead (the sharp end of the pin) size drop of gel. vaporize that and redose after 15 minutes or so if its not enogh, but never put too much on the foil at once.