Technical advantages:
1. Low risk: Most of the drugs selected for new use as old drugs have been proven safe in preclinical models and human experiments. From the perspective of safety, the possibility of failure in subsequent efficacy experiments is greatly reduced
2. Short time-consuming: Most of the selected drugs have completed preclinical testing, safety evaluation and even formulation development, so the cycle of drug development is greatly shortened
3. Low cost: Compared with the research and development of new drugs, the need for new use of old drugs in capital is greatly reduced
