I have depression and have been on Lexapro for a year, I have also gained 30 pounds but I wasn't working out most of the year. For me antidepressants made me much more mellow, balanced and relaxed. Problem is I lost the drive to push myself. I used to compete with myself on working out.
I am not sure it is the medicine or the extreme stress at my job that has killed my activity level. One thing I have found is running or harder cardio takes the pounds of quicker. Road riding never worked for me because I am not able to push myself as hard, but a lot of people do lose weight cycling. Variety also helps, I now run, hike, road ride and mountain bike.
Another free resource I like is Sparkpeople.com, you can journal your food and make a good plan. Hope you find relief, it is hard when you know you need medicine but aren't happy with the side effects.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan