I have had a terrible time lately with exhaustion, swollen glands, sinus problems. The dr and I decided springtime allergies are probably part of the cause. Has anyone tried xyzal allergy medicine? She gave me samples to try, she forgot to tell me when its a good time to take it. I hate to take a new med as I have so many problems. I hope it doesn't make me tired as I already am. I am allergic to tree pollen, mold, animals, etc. etc. anyone else have allergies? what do u take?