Belviq
"Belviq gave me horrible headaches when I started taking it and if I forgot to take it (when the meds left my system). At first it didn't do anything for me, then after taking it for 4 months, I gained 20 pounds. I've read this medicine works similarly to antidepressants and I've had weight gain problems with antidepressants in the past, so I'm thinking that's why this medication did not work for me."