My DS is ten, and has an unspeakably miserable time every May/June with his hayfever. He's had a particularly bad day today, and is crying as his nose is so blocked 
He takes 10mg cetirizine every morning from the end of March onwards (the allergy consultant said he should take it well in advance of the season to build up the antihistamine effect - this does help to some extent, in that his eyes haven't completely closed up for the past two years). He also has a steroid nasal spray and eye drops, which he uses regularly. However, he is still suffering.
I'm wondering whether I can give him a dose of Piriton tonight in addition to this morning's cetirizine (I think I recall the GP saying it was fine to do one in the morning and one in the evening - but can anyone reassure me, as I'm not certain!). I'm also wondering if there are any herbal/alternative remedies that I could try. I bought local honey at vast expense, but he doesn't like honey!!
Any help or advice would be so gratefully received...