Drug repositioning is the technique of assigning indications for drugs meant for another use than their initial one. One of the most well-known instances, for instance, is sildenafil citrate, first recommended for angina and then developed into Viagra, a commonly used drug for erectile dysfunction ( ). Many drugs have been moved throughout early medical history, including some ancient ones. The formal coining of medication repositioning can be found in a 2004 paper by Ashburn and Thor ( ). Initially, this paper described the method used to investigate new ways to effectively administer present medications for yet-unknown disease indications ( ). Drug repositioning studies the possible efficacy of existing medications and their application to treat diseases outside their current therapeutic reach. Among the advantages of drug repositioning over more traditional methods of drug development include less time and money needed for the latter. Furthermore, the medication employed has already been tested initially and has shown safety in human subjects, enabling the elimination of Phase I clinical studies. Drug repositioning shortens the cycle of pharmacological development ( ).