Your dosage of Qsymia will depend on how you respond to the diet pill, other health conditions you may have, and other factors. You will likely start at a low dose, which can be slowly increased as needed. This medicine is meant for use in combination with a low-calorie diet and a regular exercise program. Qsymia capsules are usually taken once a day, preferably in the morning.
The dose of Qsymia® (phentermine and topiramate) your healthcare provider recommends will vary, based on several factors, including:
- How you respond to the medication
- Other medical conditions you may have.
As is always the case, do not adjust your dosage unless your healthcare provider specifically tells you to do so.
The usual starting dosage for weight loss is Qsymia 3.75 mg/23 mg once a day in the morning for 14 days. After 14 days, the amount is usually increased to 7.5 mg/46 mg once a day.
If you haven't lost at least 3 percent of your original weight after taking Qsymia 7.5 mg/46 mg for 12 weeks, your healthcare provider will either recommend you stop taking the medication, or increase your dose. If your dose is increased, it will usually be increased in two steps: first, to 11.25 mg/69 mg once a day for 14 days, and then 15 mg/92 mg once a day thereafter.
If you haven't lost at least 5 percent of your original weight after taking Qsymia 15 mg/92 mg for 12 weeks, your healthcare provider will likely recommend you stop Qsymia treatment. At this point, it is unlikely the medication will work for you.
People who have moderate-to-severe kidney disease or moderate liver disease should not be treated with doses higher than 7.5 mg/46 mg once a day.
If you need to stop taking Qsymia 15 mg/92 mg, your healthcare provider will slowly reduce your dosage. It is usually recommended that people take one dosage every other day for at least a week before stopping the medicine altogether. Stopping it too quickly could lead to seizures.