Hello .... I catch cold very easily - atleast once every quarter and it persists for a long time. I got a Sinsus X-Ray done. I was diagnoised with thickening of membranes and sinuses filled with fluid. My Doctor tells me that the cold is because of the sinus condition. I have been prescribed Duonase Nasal Spray - Once every nostril twice a day. Questions : * Is a Nasal Spray necessary ? Can I take Oral Medicines ? * Will I have to use it life long ? * Will this be a habit forming drug ? * What are the side effects ? * Will long term use have any affect on my sense of taste or smell ? Thanks much for your opinion.