I'm allergic to cats and dogs, but like an idiot I live with lots of them... though I am usually semi-congested, my body has become used to the allergens over time.  Spring does cause problems for me...  I used to take Zyrtec-D twice a day but the pulmonologist took me off of it because my pulse was racing during a visit.  (I was nervous about getting the "lose weight" lecture) I thought I would die without it, but I have to say that I've been fine for a year now without a daily allergy medication.  I use Flonase when everything starts blooming and Benadryl if I'm feeling extra sneezy or scratchy.