Phentermine
"I started this medication a little over a month ago. I seemed to have a lot more energy at first and as of today I've lost 10 lbs. A few days ago however, I began experiencing chest tightness and shortness of breath. I went to my PCP who then sent me to the ER. I completed multiple tests and stayed overnight in the hospital for evaluation. Everything came back without any definitive answers as to the symptoms I've been experiencing. Several doctors mentioned that they believe the Phentermine to be the cause and recommended that I stop using it. It is now day 4 without taking any and I'm still feeling the same symptoms. Only time will tell... if I feel better after a week then I suppose they were correct."