I watched a special about this (20-20 or something like that) a couple of months ago. From what this program says these drugs can work by changing your hormones but it is a PERMANENT lifestyle change. Even the ladies that had great results on the show said that once they stopped the drugs their boobs went back to their previous size.
As for the surgery... I've birthed and breastfed three babies and I'm pretty happy with my size....I just wish I could have someone put them back up where they belong!