Allergies
"I&#039;ve only taken Xyzal for allergies, twice.  The first time I took 1 5 mg pill at 1700 hrs and by 2000 hrs, I was completely knocked out, as if I just had a meeting with Bill Cosby, knocked out.  According to my fitbit, I didn&#039;t move for 10 hours 15 min.  During the first three hours of the experience, I felt everything pop in my head and loosen up, but as that was going on my stomach became upset.  When I woke up in the morning it felt like it wore off.  I&#039;ve tried this medicine because Zyrtec cause mood swings that causes me to be the most unlikable person in my city and I live in DC.  I tried the medicine with a 1/2 dose the second night with the same side affects and the same intensity, but without the benefits and those last 8 hrs."