Why is phentermine prescribed with topiramate?

Topiramate is sometimes prescribed alongside phentermine to strengthen the desired effects of phentermine. 

The combination of topiramate and phentermine was previously prescribed off-label, meaning the combination was prescribed for weight loss without it being approved by the FDA for this purpose. However, in 2012 the FDA approved Qsymia, a single pill containing a combination of these two medications.

Qsymia 1Qsymia 2Qsymia 3Qsymia 4

Click here to read more about Qsymia.<o:p></o:p>