"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Allergy season is in full swing, and chances are, if you're one of the 25 percent of adults who suffer ...

Xyzal and Zyrtec are antihistamines that relieve allergy symptoms like sneezing and itchy eyes. Xyzal is less likely to cause drowsiness compared to Zyrtec, making it a better choice for some people.