Benzylpiperazine, commonly referred to as BZP is an recreational drug. It is also available with trade names such as "A2", "Frenzy" and "Nemesis", It is a stimulant and may cause Euphoria. People believe it works in a way similar to MDMA. The effects produced by BZP are comparable to those produced by amphetamine. Side-effects include acute psychosis, problems with the kidneys