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Phentermine and Topiramate Drug Information

Phentermine and topiramate (Qsymia®) is a combination drug approved to help certain people lose weight. Specifically, it is approved for use in adults who have a body mass index (BMI) of:
This weight loss drug works by suppressing the appetite and helping people feel fuller faster. It comes as a capsule that is taken once daily. Your dosage will depend on how you respond to the medicine, other medications you are taking, and various other factors.
If your healthcare provider recommends treatment with phentermine and topiramate, he or she will need information on your medical history and any other drugs, vitamins, or supplements you are using. Possible side effects of this medicine include insomnia, constipation, and dizziness.
(To learn more about this medication, click Phentermine and Topiramate. This full-length article provides information on what to expect during treatment, important warnings, and more.)
Last reviewed by: Arthur Schoenstadt, MD
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