I have been taking the following perscriptions together for some time now; lipitor, lamictal, sinequan, and cymbalta due to being diagnosed with Bipolar 2 and high cholesterol. I have gained over 50 pounds within 5years and my diet and exercise have not changed that much to have gained so much weight. I am 47 years old. I am wondering if any of these meds or combo of meds could be a reason for my weight gain? I was always underweight for my age and height, even after having 2 babies, I was skinny. Please advise. Thanks