HGH has antihistamine formulas to look at. Â My spouse has been managing his allergy symptoms for 20 years with just stinging nettle. Â Usually by August he’s taking nettle daily through the first hard frost, earlier if it’s a heavy spring pollen. Â It significantly lessened his reactions, just give it a week or so to build the tolerance in the body. Â Eating local raw honey is often suggested as a way to get a body adapted to seasonal pollens as well.