Nanotechnology in medicine includes drug discovery, tissue engineering, imaging, and diagnostics. Notable nano-drugs include Doxil, Abraxane, Myocet, and Hensify. Key companies: Sona Nanotech (non-toxic gold nanorods for photothermal therapy), Nanobiotix (NBTXR3 radioenhancer), Cour Pharmaceuticals (immune-mediated disease treatment), ARIZ Precision Medicine (targeted cancer drug delivery), Blueberry Therapeutics (fungal nail infection treatment), Cello Therapeutics (biomimetic nanoparticles for immunotherapy), Nanoform (API nanoparticles via CESS technology), Zylo Therapeutics (Z-pods for enhanced bioavailability). Market size expected to grow to $13.9 billion by 2033.