Hi Sam
If you want to stop the sneezing & eye trouble affiliated with hayfever, then try the Llyods pharmacy light device, it uses a red light which is placed up the nose for 2-3 minutes, I used it last year for the 1st time as I like the rest of my family suffered with hayfever for most of my adult life, and it was driving me mad after laying in long grass on a warm day. So I got this device and used it to start with for a week day & night (twice a day), after that once a day. Went back to the same field and NOTHING no sneezing no itching, and haven't suffered since nor has my wife (who suffered to) I have recommend to other people with fantastic results.
Best device ever and cheap too, bought of the internet, for about £15 no more tablets or sprays, best buy ever, most of the time it sits on the side, but if the pollen is strong a couple of days with the light and no more allergy.
Hope it helps.
ATB