I seem to recall that the expuration of Nasonex is a long way off - something like 2018. Maybe the first patent goes off in 2014?
My doctor prescribed Nasonex in the fall of 2013 and it cost $150 as insurance said fuggetaboutit. I used it but decided to not get it anymore due to the absurd cost. Then I discovered Nasacort at Walmart in the sprint of 2014 which works fine and cost $30 for two 120 spray count bottles. Now Flonase is OTC, though it currently costs more than Nasacort coming in around $22 per 120 spray count bottle. I suspect if Nasonex goes OTC it will cost more than Flonase!