Changing Meds Soon

My insurance carrier, has decided that I must try Celexa before they will help cover any more of the Lexapro charges.  Nice, eh?  I am on 25 mg Lexapro currently, switching to 40 Mg of Celexa when my current script runs out, a bit over 2 weeks.  If it doesn't work, I will just pay the full retail on the Lexapro.