Recommended by my allergy doctor - get a thing of saline nasal spray. It's cheap, there's one called Ocean she specifically mentioned, I got it at CVS for about 6 dollars for two things of it. Every time you go outdoors, as soon as you come back in, spray it twice in each nostril, then blow your nose. It cuts down a lot of pollen reaction. The pollen is remarkably heavy this year.

I am an "alergic person." I am on an old antihistamine/decongestant called (originally) Rondec year round. It's great. It's now generic, too (Cardec or Andec, I forget which) and I don't have any post-nasal drip ever (unless I get a cold).