Eucalyptol is a natural organic compound which is a colorless liquid. It is a cyclic ether and a monoterpenoid. Eucalyptol is an ingredient in many brands of mouthwash and cough suppressant. It controls airway mucus hypersecretion and asthma via anti-inflammatory cytokine inhibition.
Menthol: It provides cooling sensation by stimulation of cooling receptor and gives local anesthetic action
Methyl Salicylate: It penetrates and reaches at high concentration in pain regions and inhibit the prostaglandin synthesis and relieves pain effectively
Thymol, one of the chemicals in thyme, is used with another chemical, chlorhexidine, as a dental varnish to prevent tooth decay. In foods, thyme is used as a flavoring agent. In manufacturing, red thyme oil is used in perfumes. It is also used in soaps, cosmetics, and toothpastes.
Fluoride salts are often added to municipal drinking water (as well as certain food products in some countries) for the purposes of maintaining dental health. The fluoride enhances the strength of teeth by the formation of fluorapatite, a naturally occurring component of tooth enamel. Toothpaste often contains sodium fluoride to prevent cavities, although tin(II) fluoride is generally considered superior for this application.