"i started the pill and the first day was super wacky and dizzy. after the 10th day i discontinued. i had gained weight; had water weight but was dehydrated, had blurred vision; dizziness, headache, backache and joint/muscle aches; couldn&#039;t complete a sentence; chills, shakiness, vivid dreams, couldn&#039;t drive, extreme fatigue and disassociation.  i think i had seratonin syndrome.  i was not successful on it, but the patient insert was helpful and i realized i needed to get off of it. after stopping taking it, i started feeling better by the hour.  now, two days late, every symptom has gone away.  i have about 40  lbs to lose.  i am happy for those who found success with belviq but wanted to post my experience for those who are having trouble."