I use Stinging Nettle. There's supplements and packaged teas, but I grow the plant myself and use it as a tea ingredient, combining it with other kinds of teas.

I too use stinging nettle - usually as a tea but if I'm suffering a lot I will use it in tincture form. The tincture I use is a combination formula that also has eyebright, yerba santa, tumeric, lobelia, and "ambrosia herb." The "ambrosia herb" on the label is funny. They have to note it that way, I'm sure, since no one would buy it if you wrote "ragweed" on the label. Yup, ragweed is an allergy herb. It's one of those "hair of the dog that bit you" things.

I also swear by neti pots.

FataMorgana

Also, try taking a daily tablespoon of locally produced wild flower honey... Maybe put it in your tea.

I have heard that cayenne pepper and nettle are good for allergies if you incoorporate them into your diet.

George