i think what he is asking or getting at is that he wants to run higher than the prescribed dose. so therefore the amount he would get from the pharmacy wouldnt be enough. so therefore if he buys it from the UG
and gets caught with it, would he be alright because he has a script saying that he is supposed to be on it. and the answer would probably be no.
in vet med we are required to keep track of all controlled drugs, listing who they go to and what animal they are for and how much is to be given and how often. that is the legal way that the drug is to be used. any deviation from that would or could be considered illegal use because it isnt according to the orders on script. so if you have a script for x amount but are using twice that much, according to the feds, you would be breaking the law.
but, really, how are you going to get caught with it? unless you are doing other illegal stuff that brings the cops to your door, you should be fine. or if you work somewhere where they do random drug testing, then you might be in trouble. as prescribed doses dont significantly raise ones test so if you were using more and your levels were above normal, you might be in trouble.