- Kava - Information from the Encyclopedia of Psychoactive Substances. Botanical profile and traditional uses of the shrub Piper methysticum and the psychoactive beverages made from it. { herbs | materia medica | kava-kava }
- Piper methysticum - Summaries of and links to articles about the use of kava kava. { herbs | materia medica | kava-kava }
- European Kava Forum - European website providing information, with a general focus on the European ban. { herbs | materia medica | kava-kava }
- KavaRoot - Information about kava, including folklore, ceremony, geography, health studies, science, history, news, and preparation. { herbs | materia medica | kava-kava }