WASHINGTON, D.C. – Recently, U.S. Senator Rand Paul (R-KY), led a bipartisan group of nine senators in sending a letter to the U.S. Food and Drug Administration (FDA) to ensure the FDA is updating its animal testing regulations following the enactment of the FDA Modernization Act 2.0 last year. The legislation ended an outdated FDA mandate that required investigational new drugs to be tested on animals in pre-clinical trials. The legislation did not ban animal testing, but it allowed drug sponsors to use modern alternative methods to demonstrate a drug’s safety and effectiveness where they were suitable.