an aqueous oral preparation is provided having from about 0 . 5 % to about 10 % by weight of a peroxide compound such as hydrogen peroxide or urea peroxide and from about 0 . 01 % to about 2 % by weight of a compound providing fluoride or fluoride - containing ions in an aqueous composition . the compound may further include a thickening agent , such as carboxy polymethylene , a non - ionic surfactant , such as pluronic brand poloxamer , buffering agents , stabilizers , glycerine , sweeteners , and deionized filterd water as a solvent . a variety of flavoring and / or coloring agents may also be added . a stable compatable and highly effective dental preparation is thereby provided .