Party pills, also known as "herbal highs", "pep pills" "dance pills" and "natural power", is a colloquialism for a type of recreational drug whose main ingredient was originally benzylpiperazine (BZP), but has expanded to a wide range of compounds with a variety of effects. BZP is banned in several countries, including the United States, Republic of Ireland, Australia and New Zealand, but is available on a more or less restricted basis in many jurisdictions. A range of other piperazine derivatives have also been sold as ingredients in party pills, and many of these branded "proprietary blends" have subsequently been sold in countries around the world.