This book appraises the role of lipid-based drug delivery systems (LBDDSs) with respect to the bioavailability and controlled delivery of complex drug molecules for improving their clinical viability. It covers the latest developments and advancements in the field of drug delivery, and explores and compiles information on the current situation of lipid-based formulations used as versatile excipients and all their possible routes to improve therapeutic benefits. The book discusses novel formulations such as depot formulations, micro- and nanoemulsions, solid lipid nanoparticles (SLNs), nanostructured lipid carriers (NLCs), liposomes, nanoliposomes, micelles, nanosuspensions, lipid implants and inserts, and lipid nanotubes. It presents preparation methods of LBDDSs and their physicochemical properties, and portrays their various application angles and their impacts on drug-conveyance frameworks when employed in vitro and in vivo. The book is beneficial for researchers working on lipid-based drug formulations as well as biological and translational drug delivery. It is also a useful resource for course work of students of various academic degree programs such as pharmacy, health sciences, biotechnology, and microbiology; postgraduate and PhD students; and postdoctoral fellows researching on nanomedicine-based drug delivery systems.