You will probably feel the fent but only for a couple of days and then your tolerance will be so fucked that the gear you were using before will no longer be good. If I have over 80mg of juice in a day then no amount of H will break through that it's a waste of money. I don't IV but I feel if you were to IV then yes you would feel something from it but it's not worth it at that point in my opinion. Be safe whatever you do and come back to let us know how it went, fent is so so strong please don't do it alone if you decide to go that route, make sure you tell people close what you are doing.