Claritin has been a lifesaver for me. Most of my life, I was confined to indoors during the spring and fall seasons. I had all the major symptoms: itchy, watery eyes, nose that would either be a leaky faucet or congested, and the accompying sinus headache. I tried Allegra and while non-drowsy gave me a disconnected feeling and an inablility to focus. My doctor switched me to Claritin while it was still only available by perscription. What a difference. Not only have my symptoms went away, but all with allowing me to fill normal. I work primariy outdoors, and live in the central valley of California with significant amounts of smog, pollen, mold, and grasses thus I am extremely grateful for Claritin. I love that it truly last for about 24 hours and Ican pick it up at any major drug store. If you have tried other allergy medicine and they have not been as effectiveas you would like, give Claritin a shot.