hi ya (sorry late replyer here!!)
my dr has stated that he is happy for me to continue taking the tablets until i get to the ideal weight he has kinda set for me (i think its 61-63kg) or until a year has past (as you are not supposed to be on the tablets for more than a year without a break.)
so if i dont get to that by the end of the year he will want me to take a break and then i only assume he would start me back on them after 6 months, if i have still not reached that goal!