Substances such as chlorine dioxide, zinc chloride and essential oils like eucalyptol, menthol, methyl salicylate, and thymol have shown to fight ... https://www.adha.org/.../files/7234_Bad_Breath_Fact_Sheet_1.pdf - External Health LinksMenthol overdose ... aches and pains , such as Ben-Gay, Therapeutic Mineral Ice Peppermint oil Note: This list may not include all uses of menthol. www.nlm.nih.gov