My doctor is pretty open to me asking for upping the dose. I now take 600mg/week, and due to my legit hormone problem, that amount causes my levels to stay in the higer end of normal. I doubt he'd allow it if my bloodwork didn't support it, or if I had any side effects. (Never had any acne, aggression, or any other bad effects).
I just call in and say I'm low, and the secretary asks how many vials I want to buy. I never pushed it to the limit, but I have bought 4 vials (10 ml @ 200 mg/ml) at a time with no question. It's their own in-house compounding pharmacy. One thing I did say once (the truth in fact), is that I left a couple of vials at our other house in Dallas, as I didn't want to hassle with the airport since we drove there and flew back that time.
Charles