I've been on both of these medicines for a few years now, but last week I was instructed to increase my Zoloft to 75mg and reduce my Lamictal to 100mg. I was also put on risperidone for OCD/bipolar. The first 2 days went okay but I had a bad dizzy panic attack in the grocery store yesterday and today I haven't been able to leave my room. Even when I'm laying down I feel dizzy spells and light headedness. My heart keeps racing. Feels like I'm on a different beating pattern. I've been extremely anxious and shaky and my left hand is limp. I'm also more agitated and on edge. I don't remember it being this bad. Any suggestions of how to get through this? How long should I wait before being concerned? Has anyone else had this problem? Thanks so much.