Hi! My doc recently gave me a prescription for that too. I've been taking it for about 2 weeks, (1 capsule daily) & I haven't noticed any negative side effects really. . .the only thing I'll mention as a word of caution is that if I take one and then go exercise hard right after that, it makes my heart really race.
It's good to be monitored for your blood pressure while taking it, too, I'm told. Best wishes for you ~ hope you can take it well too! It does seem to help you feel a lot less hungry.