Hey there,
In my years of trying every drug known to man, my feeling is that it's not so much that a drug will cause weight gain, but that how it makes us feel affects how we eat and exercise. Or it could just be that I'm a blimp.
It's tough losing weight - my weight gain is all down to depression - undiagnosed and wrongly treated for two years. I was a wreck. Now it's years on and I've finally found a drug that works, but the weight is still with me.
When I first started on meds, my doctor said that it was the same as being diabetic and needing insulin, or being short sighted and needing glasses. Depression is a chemical insufficiency (kind of) in the brain. You can't fix it yourself. You can't just get over it. You need help to regulate your chemical levels. No-one should feel guilty about taking meds for this - if nothing else, look at it as taking meds for the people you love. I know I'm fricking awful to be around when I'm unmedicated - so I take meds so that those around me don't suffer.
So, Leenie - you're also a pharma employee?

Kindred spirits!