@lenorj When I took Allegra every 24 hours I felt my nose was too dry. Because of this I take one 180 mg tablet every 30-36 hours. I mark the time I take it on my calendar so I remember when I took it. My pulmonologist is on board with this plan. I have quite an allergic profile (molds, dust, trees, grasses, dogs, cats) and I get monthly allergy shots (3). Before starting Allegra I was simply was unaware how much sinus drainage went into my lungs, rather thinking all the mucus was from bronchiectasis. I hope you get a good result if you try it.