I just recently upped my dosage of Lamictal to 100 and added Xanax XR .5. I'm used to weighing between 180-182. At my initial visit I weighed 178 and over the course of 3 weeks after the med changes, I lost 5 lbs. Now down to 172-173. I am a worrier so of course I'm very concerned. I'm also taking a few other meds that I've been on for years so I'm almost sure it has to do with the Lamictal being upped or the Xanax XR, or I have a disease. Has this happened to anyone else on these meds?