Fig. 1From: Repositioning of drugs for Parkinson’s disease and pharmaceutical nanotechnology tools for their optimizationDrug repositioning and polypharmacology. A drug can have more than one active site, which allows the molecule to target different organs and gives rise to multiple therapeutic indications; this is known as polypharmacology and is used in the repositioning of drugs since there are drugs approved for a therapeutic indication for which its biological target is known, but with the potential to target other tissues and alleviate other pathologiesBack to article page