weight loss
"I started phentermine 05/13, by 07/13 the medication felt as if it had quit working. I become "immune" to medication. Example, I have High Blood Pressure & Diabetes. I have to change my medication and Insulin every 3 months because they quit working. I can eventually go back to the same meds, but only after they've been switched up a bit first. 
My doctor upped my dosage to x2 a day. I got the script 09/01/13 & joined the gym that same day. I'll take the phentermine for 3 weeks, then come off for 10 days. Start again for 3 weeks. I work out 5 days a week, for 1 1/2 hours. On 03/07/14 I had dropped 56lbs. No where near what I wanted. That same day, I started the Topamax. I've not weighed yet but I feel a difference. No major side effects."