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Objectives:  The aim of this double‐blind, parallel study was to test the clinical efficacy of a newly developed mouthrinse in the treatment of oral halitosis in patients without periodontitis.

Material and methods:  Forty volunteers, recruited in two centers, participated in this study. Patients were selected on the basis of (1) halitosis of oral origin, (2) full‐mouth organoleptic score>1, using an arbitrary 0–5 scale, (3) level of volatile sulfur compounds (VSC)>170 parts per billion (ppb) and (4) Winkel tongue coating index (WTCI)>4 (0–12). Intervention included gargling with a mouthrinse containing chlorhexidine (0.05%), cetylpyridinium chloride (0.05%) and zinc‐lactate (0.14%) or with a placebo mouthrinse without active ingredients. At days 0 and 14 clinical variables were assessed in order of performance: (1) organoleptic assessments, (2) levels of VSC, and (3) WTCI.

Results:  Treatment with the active …