Question: how long should you take qsymia?
Answer: Qsymia Dosage Your doctor may prescribe a dose of 3.75 mg/23 mg phentermine and topiramate once a day for the first 14 days of treatment. After that time, your doctor may increase your dose up to 7.5 mg/46 mg a day for 12 weeks. Expect to have follow-up visits with your doctor to assess your weight loss.