Had my class one medical a week ago. i was told the use of clarityn is acceptable but anything that contains cetirizine is a no go. you can use all the eyedrops and nasal sprays you need.
I used to get hayfever really bad when i was younger but now at 25 it has settled down drastically just in time for me to start training!
The RAF cant test for hayfever and if it is not on your medical records, why mention it?!