Qsymia is a combination of phentermine and topiramate. Phentermine is an appetite suppressant similar to an amphetamine. Topiramate is a seizure medication, also called an anticonvulsant. Qsymia is used in treating obesity together with diet and exercise and it is sometimes used to treat obesity that may be related to diabetes, high cholesterol, or high blood pressure. Know more about Qsymia and its side effects here.