Peptide-conjugated liposomes have three main components: anticancer drug, a liposome carrier, and targeting peptide ( Figure 2 ). Remote loading methods such as the ammonium sulfate method [13, 79] and the pH gradient method [80] can encapsulate weak bases such as doxorubicin or vinorelbine into the liposomes with more than 95% efficiency. Schedule-dependent drugs such as vinca alkaloids, topotecan, and 5-fluorouracil are also potential candidates for liposomal delivery because they can extend the time when cancer cells are exposed to therapeutic levels of the drug.