Nearly a year ago, Brazilian competitive swimmers Cesar Cielo, Henrique Barbosa and others were found to have furosemide, combined with the possibility of the substance coming from cross-contamination. While these athletes got a warning, it could have been much more severe – they could have lost their chance to compete as well as their reputations. Cross contamination should be avoided across all industries, but none so much as in the pharmaceutical industry for many reasons. For instance, a drug, especially one like penicillin could create a hyper-sensitivity and even death in some patients. It is commonplace to think that the best way to avoid this is by having a supremely sterile environment for both manufacturing and packaging of items.