Not quite sure how and who determines Formulary Medicine, Ive seen a huge price decrease in certain medications in the pharmacy, So I made a comment and said I really wish my Atrovent HFA was part of it, the pharmacist checked and then freaked out and said Bill your prescription is 0.00, I didn't believe it and looked it up myself, Wow, I then deleted the one remaining script and typed in a request for a 90 day supply. Maybe someone has insight on Formulary Meds and let us know.