I have done so much fentanyl various ways but shooting up is one I have not had the guts to try. This drug is extremely temperamental and has been known to kill many. I personally think that injection is to much for the body to handle and do not wish to try it. I prefer smoking over anything else. Just put a little tiny bit of gel on a piece of aluminum foil and put a lighter underneath that and suck the smoke it makes up with a rolled dollar bill. It is the most incredible feeling. But don't keep doing it over and over. A few to many hits will make you keep puking. And then after you puke you will crave more. By far the most addictive drug I have EVER tried. I sometimes don't have it for months and still crave it like I just had it yesterday. Regardless it is VERY VERY good feeling. Don't try to have sex though, you will never be able to blow a load and will get very frustrated. At least I always do.