I take Alavert for my seasonal allergies. It's Loratidne just like Claritin, but it dissolves in the mouth and just seems to work better for me. I am also on flonase for my allergies and sinuses. My CF clinic also said that I can take benadryl when I'm incredibly symptomatic even though it affects breathing, because it's better for me to be able to sleep and function then have my mucus dried a little. I have pretty severe allergies to grass pollen and I live in the valley where 90% or so of the WORLD'S grass seed is produced, so I feel you in the allergy department.