Azelastine
"I don't know what I'd do without Azelastine. It significantly improved my severe allergy symptoms immediately. No longer waking in the middle of the night with itchy throat, can actually breathe throughout the day! I do wake up congested, but 10 minutes after my azelastine dose I'm good to go. I do take it in conjunction with an oral antihistamine as well, but not sure if I still need it...I just kept taking it since i was already using it before."