Designer drugs are substances designed to mimic the effects of an existing drug. Their chemical structure is altered, which prevents them from appearing in standard drug screening tests. The idea behind these drugs is to create a new substance that is not classified as illegal, allowing dealers to sell it without breaking the law. As law enforcement officials get to know these drugs, they are classified as illegal. Dealers then alter the structure again, repeating the cycle. In the United States, around 200-300 new designer drugs were identified between 2009-2014. These drugs are often distributed in night clubs, parties, and raves. Aside from their many detrimental effects on the body, these drugs have an added danger and lethality.