Phentermine
"I started on this medication (37.5 mg) on March 12, 2015 weighing 217. Today, August 30, 2015 I weigh 175.  In a few weeks I will begin a much lower dose. There are some negative side effects, dry mouth and constipation being the most annoying but I had no jitters or changes in sleep. I'm 47 and am 5'5 with a goal weight of 140."