Ya know I really haven't had any truly adverse affects other than what you're told about when I was first prescribed to take it. You need to eat w/in the first two hours of taking the medication first thing in the morning so that you don't feel lightheaded. The first day I took it I didn't get a chance to eat until about 3 hrs after I took it and I had stood up and got a lil lightheaded but I sat back down and was fine. The only other adverse affect was that for about two weeks I felt like I was wearing a ball cap on my head.?? lol
That eventually went away but I think it was just my body getting used to the medicine because it's meant to increase your metabolism and to also supress your appetite(which it does very well.) Other than those to minor things I haven't had any real adverse effects from it. I would definately speak with your doctor though about everything you take for medicines as well as how much and why it is that you are wanting to lose. Good luck!