catnip, nettles, alfalfa, Chamomile, ginger, garlic, fennel, basil, (not and herb) Quercitin not sure on how much, eyebright, and...take your pick.
Stinging Nettle Tincture or tea would be good to start with. It has natural antihistamines as do the above in some shape or form. Oh and local honey if you can.
Much nicer than any dreaded OTC that turns you into a zombie. Can't stand them.