Allergies
"I started using this right after starting immune therapy for indoor and outdoor (perennial) allergies.  I had been on Zyrtec and the additional dose of allergans coming from the shots made me miserable with continual sinus mucus draining/blowing; I tried taking Benadryl (on top of the Zyrtec) but that put me to sleep.  The Xyzal stopped the allergic reaction, so I&#039;m on it now for the second month with no side effects; and very happy to have it."