I recently had a prior authorization for nuvigil for shift work disorder that was denied, my psych wrote the script for 250mg pills assuming it would be denied (funny he didnt mention prior auth til I ask about it) so I could buy less pills and split them instead of writing it for 150mg which is the approved dose for shift work disorder. When I called to find out why I was denied considering I had a correct diagnosis but the rude cvs caremark person who took my call said I dont have narcolepsy and didnt explain anything else. Could the denial of been caused due to the dosage difference and the insurance guy didnt want to tell me that?