http://allegraotc.net This is a great resource for everything you need to know about Allegra OTC. Make sure to check out the site to have all of your questions answered.
Crest has now come out with a new tooth whitening system called Crest 2 Hour Express. Check out all the information this video refers to:
http://hubpages.com/hub/Crest-2-Hour-Express-Whitestrips
