In 2004, a non-steroidal anti-inflammatory drug known as Vioxx was abruptly removed from circulation five years after it had been released to the market by Merck & Co. The drug, which was marketed to treat conditions like arthritis, was one of the most widely used drugs to have ever been withdrawn. It turned out to be deadly. Katy Taylor at Cruelty-Free International and CrueltyFree Europe explains why faith in animal experimentation is misplaced.