I have suffered from allergies and headaches for many years. Allegra has worked the best for me to eliminate common allergy symptoms including the headaches from sinus pressure. No longer do I wake up completely stopped up and unable to breathe; I now can inhale! Much of my seasonal sneezing has stopped as well. I had tried to avoid using a prescription medication because of cost, but with insurance coverage, it's not much more than the medicines I had used in the past. I would recommend Allegra to anyone who suffers from seasonal allergies. It works well as an antihistamine with no drowsiness...