The roots of the plant are used to produce a drink with sedative, anesthetic, euphoriant, and entheogenic properties. Kava is consumed throughout the Pacific Ocean cultures of Polynesia, including Hawaii, Vanuatu, Melanesia and some parts of Micronesia for its sedating effects. Its active ingredients are called kavalactones. A Cochrane systematic review concluded it was likely to be more effective than placebo at treating short-term anxiety.