Unfortunately its justifiably classified as 2nd gen and IIRC studies show that it's generally more effective for hay fever. Personally, I've found that loratadine is pretty ineffective, especially after regular use.

I found loratadine very effective but it takes time to work. At least a week

For me, loratadine was ineffective, and I can't distinguish cetirizine and fexofenadine - both are maybe 50-60% effective with no notable side effects, and allergy season means extra fatigue no matter what. Cetirizine does have the shortest half life.

Second that, cetirizine definitely feels more like clemastine or meclizine than a proper second gen "non sedating" antihistamine. And with hay fever AND an allergy to nuts, I've tried them all, haha.

Cetirizine is a "no go" for pilots. Fexofenadine and loratadine are OK to fly on though, as is fluticasone.