Some AA folks and groups can have really strong opinions on medications. As a rule, it you are taking meds prescribed by an MD, and taking them as directed, I would just keep this to myself. There really is no need to disclose this to the group. If your sponsor has an issue with it, then get a different sponsor. Also, if you are in a large enough area, try a different group. No two are the same, and you may find another more accepting. Good luck to you.