Thank you for your question and welcome to AnxietyConnection.com.
I am not a medical professional and would not be able to give you medical advice.
I am not aware of any medication for anxiety that would also help you lose weight. Some antidepressant medication can cause weight gain. There are a few articles on MyDepressionConnection.com that address this:
When Your Antidepressant Makes You Gain Weight
Weight Gain and Antidepressants
I hope this helps.