I'm on the vivitrol shot and I go too the doctor and get subs 8mg. and i just started going to my sub doctor about 1week half after my 2nd or 3rd shot. And I'm telling you subs will and do break through this shit YES IT FING DOES. vivtrol can only be beat by subs I personally think I shoot/IV a full sub with about 60-70cc of water then let it deslove and mix really good then suck up half of it then put another 10cc in it then shake it make sure it's mixed well. Don't mess up and get cotton fever. And abou 15-25mins you will start feeling it and gets me high and all that good stuff I've tested the waters