Abstract

Combination therapy has become much more effective in treating cancer because it produces combinatorial anticancer results, lowers specific drug-related toxicities, and inhibits multidrug resistivity through several modes of action. Combined drug delivery (CDD) to cancerous tissues, primarily based on nanotechnology, has developed as a viable method in recent years, surpassing various biomedical, biophysical, and biological obstacles that the body erects to prevent antitumor drugs from reaching their target tissues. In a combined strategy, the prolonged, regulated, and targeted administration of chemotherapeutic medicines improves therapeutic anticancer benefits while reducing drug-related adverse effects. CDD systems have several advantages over traditional drug systems, such as improved solubility, higher permeability for traveling through biomembranes, a significantly longer half-life to expand the treatment time, and low cytotoxicity. CDDs are mostly used to treat neurological, cardiovascular, neoplastic, infectious, and inflammatory diseases. Many CDDs are designed to enhance hydrophilicity to improve transportation inside or across biomembranes, particularly the cornea and skin. CDDs could be delivered to particular cells, organs, or tissues, resulting in increased bioavailability. The most widely utilized nanocarriers for CDDs of anticancer medicines are summarized in this review. This study also covers the chemical or enzymatic decomposition of CDDs and their bioactivity and pharmacokinetics. Additional clinical trials will enhance the usefulness of CDDs in treating drug-resistant tumors.

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