I have bottles of Allegra, Allegra-D and Claritin.
The "immune" thing may be in play because they don't really seem to do anything anymore.
I have been using the pollen for a couple of weeks now and I do feel better.
Yesterday at happy hour a buddy of mine and his gf sat down for a beer. He was red nosed and frig'n miserable. I told him about the pollen and he got on his Iphone and was out the door to go get some. He got back about 30minutes later. He went to the nearest listing and it turned out to be a private home and a lady in a moo-moo opened the door. She was a voodoo princess or some crap. She wanted him to come in and she would rid his allergies via a seance(sp)?.
He was so pissed. I felt bad for him but it was funny as hell at the same time. He is heading to where I got mine this morning.