Orahex Pro Mouth Wash is used to prevent periodontitis (a severe gum infection that destroys jawbone and loosens teeth) and gingivitis (gum inflammation). It contains Octenidine, which works by preventing the growth of fungi, bacteria and other microorganisms that cause infection. Sometimes, Orahex Pro Double Mint Mouth Wash may cause teeth staining as a side effect. It is for oral rinse only. Do not swallow it.