I've been on many different meds in the past, including Celexa and was just prescribed it again. The problem is I really hate to start taking it for fear it will eventually stop working. I am also very overweight and I am concerned about weight gain. Also, it was prescribed to take in the morning, but since I do have some anxiety and suffer with sleep apnea I think is I do decide to take it, night time would probably be best. Any thoughts?