I have been suffering from hayfever too and I spoke to my OB, a midwife and a chemist and they all said that Claratyne was ok to take on occassion also.

I must say it does help when you are having one of those days where you feel like you are going to DIE from the pain in your head.

The other thing I try and do is inhale some levander oil or something to clear up the senses.