I have taken belviq for 8 days now. I have gained 4 lbs while on it and I am concerned it wont work for me. I have had NO side effects at all. I have been on zoloft 20 mg for anxiety and depression for about 6 months as well. Phentermine was a miracle drug for me but I am now immune to it. This was my last hope. Anybody else out there had to wait a substantial amout of time before this med worked? :( I appreciate your feedback! And good luck to all:)