Table 2.  .

Drug repurposing can be drug-oriented, disease-oriented, and treatment-oriented

Drug-oriented Information of drugs	Disease-oriented	Treatment oriented
Off-label use of drugs	Information on disease pathway	Disease omics data
Phenotypic screening	Disease omics data	All information related to treatment strategies
Target 3D structure of the drug	Genetics data of disease	Genetics genomics
Chemical structure of drugs and ligands	Protein interaction network	Proteomics metabolics
An adverse effect of drugs