Ajwain seeds contain an essential oil which is about 50% thymol which is a strong germicide, anti-spasmodic and fungicide. Thymol is also used in toothpaste and perfumery. It is used in a steeped liquid form against diarrhea and flatulence. In India the seeds are used as a household remedy for indigestion and colic, and used in poultices to relieve asthma and arthritis. It also has aphrodisiac properties and the Ananga Ranga prescribes it for increasing a husband’s enjoyment in his middle years.