There are no set rules as such. At a level such as yours, I'd probably be revieing you weekly to fortnightly, fiddling about wit your medication on each visit.
Realistically, it may be several months before your bp is controlled, and you will probably require several meds. Having said that, the threshold your AME is looking at will be different (higher) than whay your GP is looking at, so hopefully your bp will be down to acceptable levels sooner rather than later.
I have in the past accelerated the process for patients, for different reasons than yours, but some say bringing bp down too rapidly can be detrimental.
More info here....post #16
http://www.pprune.org/medical-health...on-thread.html