I had severe allergies from hayfever for years, I tried everything from antihistermenes, herbal remedies, ocular steriods and every hayfever product on the market - to no real noticeable effect. Then my doctor advised a single shot of kenelog once a year (this was all she would allow for any patient) - IT WORKED. It was as if there was no such thing as hayfever. The only side-effect was a small dimple on my bum, so if you weigh up a small dimple on bum vs months of misery and lack of concentration etc... that is inothing. A friend of mine is a cellular geneticist at the oxford cellular research hospital and advise that steriods are harmful to your cells, but the frequency and volume I intake should not cause a problem as long as I don't keep taking it year after year (and always depends on your cellular make-up). If you have bad hayfever like myself, you need to retrain your cells to recognise that pollen is in fact a friend not foe. Inducing yoursef full of the local honey, and many herbal products taken CONSISTENTLY for over a year are said to to provide this retraining programme your body needs. I've just started this programme, but I will take another shot of kenelog to get me through this year.