I had an insurance issue with a different medicine, but thought I may be able to offer some insight; depending on your insurance company. The medicine was not on the approved list, so my doctor wrote the insurance company a letter stating that no other medicine would benefit my daughter. The insurance company, in turn, approved the prescription. So, find out from the insurance company who your doctor needs to contact and team up with your doctor to override their decision.
On the other hand, I have been reading about natural remedies because my daughter has two friends with ADHD. Having lavender air freshner was one suggestion; I bought one that goes in the return for the air conditioner that goes throughout the whole house (Home Depot and Walmart near air filters); VERY effective, I could barely keep my eyes open I was SO relaxed! Don't know how calming it will be for ADHD, but worked on me!! I also read about Attentive Child from GNC and Omega 3 as well as morning cup of flavored coffee with a powder protein supplement. I have suggested these things to one parent, but they haven't tried it yet.
Best of Luck! ;0)