Can you tell me about post nasal drip and azelastine and fluticasone?

See Below. Post nasal drip is most often caused by allergies, although there is a syndrome called non-allergic rhinitis that can sometimes cause it. Flonase treats allergic inflammation which will reduce stuffiness and drainage. Azelastine will treat drainage, sneezing, itching, and it treats the non-allergic rhinitis if it's there as well.