Using nanoparticles to deliver cancer drugs offers a way to hit tumors with large doses of drugs while avoiding the harmful side effects that often come with chemotherapy. However, so far, only a handful of nanoparticle-based cancer drugs have been FDA-approved.
source https://www.lifetechnology.com/blogs/life-technology-science-news/how-different-cancer-cells-respond-to-drug-delivering-nanoparticles