Pretty Darn Effective - Tastes terrible I was taking Nasonex from my GP, but an ENT put me on Astelin and it really works well. It's difficut not to get it in the back of the throat and it has a terrible taste, but that goes away quickly enough and man, is my nose clear in minutes and it stays that way almost all day! I don't expereince any side effects and all in all it's a great remedy.