"started taking phentermine, august 30, 2013. weighed in at 219lbs. weighed on sept 4 at 212lbs. so it is working. i don&#039;t have a lot of energy. i was working out 2 to 3 days a week before i started. so today i&#039;m taking b12 supplement to see if that will help me. overall it&#039;s okay and i need this weight off of me. it&#039;s not attractive."