The leaves of the herb kratom (Mitragyna speciosa), a local of Southeast Asia in the coffee family, are used to eliminate discomfort and enhance mood as an opiate substitute and stimulant. The U.S. Drug Enforcement Administration notes kratom as a "drug of concern" since of its abuse potential, mentioning http://gunnerlssnr.bloguetechno.com/Should-Kratom-Use-Really-Be-Legalised--18514657