I would like to re-post a comment left by "craig" on my entry on Grazax:

i was on one of the london trials of this over 3 years ago. It was a long study with comprehensive recording of daily responses and symptoms. it certainly helped me and i was symptom free for the whole summer. The subsequent years have not been symptom free but my sensitivity has certainly lessened - it has to be a really high pollen count for me to have what i consider a extreme reaction, low to moderate levels i sneeze a bit but virtually no other symptoms (i used to spend about 3 months of the year nose streaming, sneezing, itchy eyes you wanna gouge out, being dehydrated through loss of fluids and generally not good outdoors and grumpy as a result) now these only occur at peak season. its a shame the NHS are reluctant to spend the money but it *is* expensive and probably many other drugs are more important, however £2 a day for 3 years does seem cheap to virtually eliminate the whole allergy.
anyways my advice would be - if you can aford it or find a dr willing to prescribe then go for it, you have lots to gain. :)

Grazax is a vaccine against grass pollen in a pill form, and is used to treat rhinitis and conjunctivitis caused by grass pollen in adult patients. Currently, it is commercially available only in Denmark, Germany, Norway, Sweden & the UK. It's not yet available in the US, but it could be what's behind the Fight the Cause campaign being organized by Grazax manufacturer, ALK-Abelló.