I have had fluid behind my eardrum since September 2010. My physician looked and saw fluid behind my eardrum and said it's caused from allergies or sinuses. I do have allergies and postnasal drainage. I was prescribed Flonase for 30 days, which didn't work, then prescribed a 7 day steroid medication, this didn't help either. I have tried Allegra D, Mucinex D, Mucinex, Sudafed, Sudafed PE, Afrin, etc. I am currently trying Zyrtec.