Besides lexapro and effexor, what are the antianxiety meds the least likely to cause weight gain? lexa worked for a while and effexor isn't helping.

Depends : Studies show SSRIs and SNRIs are more effective than buspirone and benzodiazepines in treating GAD, although the latter may cause less weight gain. I would recommend trying Lexapro again at a higher dose but if your anxiety symptoms are out of control speak with a psychiatrist to rule out bipolar disease and consider adding a small dose of ability and use strict low fat diet and exercise.