I've heard Mucinex helps.. migth be worth asking about.  I take one every night to clear my nose enough to sleep.. I'm very sensitive to just about everything so it might help a bit without side effects other than easier breathing durring hay feaver season.  =)  (I don't know if it's true.. heard it from a tertiary friend that has it, don't know where she got the info.. but can't hurt to ask)