Hello! Have you tried to talk to your son's physician to see if they offer any coupons for the medication? I work in a doctor's office, and oftentimes they can either give you samples for certain medications free of charge, or they can sometimes get you a discounted rate (ie: a maximum $40 copay). I am assuming there are no "generics" for this medication either, but that may also be a cheaper and more affordable route if it's an option.

I'm sorry you are going through this. ):