Cancer
is conventionally treated by chemotherapy, radiotherapy,
or surgery. The urgent need to look for alternative therapeutic strategies
reflects many loopholes. Developing a drug, however, is both time-consuming
and expensive. Therefore, repurposing a licensed drug along with a
means to take care of the limitations can become a very sustainable
approach in cancer therapy. To further intensify these responses,
nanotechnology would be useful to enhance the drug’s delivery
and retention while reducing toxicity. In this review, we explore
the complicated association of cancer and drug repurposing and summarize
recent advances in nanomaterial-based drug repurposing approaches.