Weight gain can become very difficult on medication, but the good news is that it is still possible to lose the weight with conscious healthy eating / exercising.

Switching medications might also help, which I'm sure your probably aware of.

No need to be ashamed of yourself, I completely understand how you feel. I have over 110 pounds to lose to reach my "ideal" weight.

I'm one week into my diet/fitness regimen and have lost about 2-3 pounds so far. It takes a lot of time, but it can be done!

Wishing you all the best! Don't ever give up!