Thalidomide is drug that did 1960 thalidoamide disaster and banned then after. But now it come again and presebnt in clinical development for anticancer chemotherapy
The original thalidomide scandal was due to a mixture of two mirror compounds, one was good against headaches, the other caused the damage to the developing embryos in pregnant women. The scandal helped to test new pharmacology substances only after animal tests to avoid similar problems. Now, the damaging effect to growing tissue might be useful and applicable to some tumors. It will be interesting to see how this develops and which tumors may be targeted. I doubt, it will be used in pregnant women.