Abstract: The present invention relates generally to a mixture of coated and non-coated sulfonic acid cation exchange resins (Amberlite IR69) cross-linked with about 8% divinyl benzene onto which dextromethorphan has been loaded. About 30% of the drug/resin complexes are coated with a mixture of ethyl cellulose or ethyl cellulose latexes with plasticizers and water dispersible polymers such as SURELEASE. The coating level is about 50% w/w drug. Coated and uncoated drug/resin complexes are loaded with drug to about 45% by weight drug/resin complex. The ratio of coated and uncoated drug/resin complexes is about 55/45. The particle sizes of the coated and uncoated drug/resin complexes is about 20 to about 300 and about 20 to about 250 microns, respectively.

Abstract: A pleasant-tasting, substantially alcohol-free oral mouthwash composition is effective in eliminating the bacteria and other oral microflora responsible for the production of plaque, periodontitis, gingivitis, gum disease and bad breath. The composition consists of a unique blend of the essential oils thymol or eucalyptol, methyl salicylate, menthol and tripartite blend of peppermint flavor oils that are dissolved in solution using a non-ionic surfactant blend.