I was on an initial treatment for weight loss of Welbutrin & Zonisamide. After 1.5 years the medication became ineffective. The Doctor prescribe Qsymia and I asked his nurse several times how to wean off other meds. She said just stop and I knew that couldn't be right. I eased off Zonisamide and started Qsymia but haven't stopped Welbutrin. Not getting much results. I want to stop Welbutrin to see if that will help Qsymia to work. What your advise?