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 specifically for this use by the FDA, but in 2012 the FDA approved the weight loss medication Qsymia as the brand name for this combination.

To read more about Qsymia, pleaseclick here.