Cepharanthine is primarily used in research for its anti-inflammatory and immunomodulatory properties. It has been studied for its potential to inhibit viral replication, including in coronaviruses, making it a subject of interest in antiviral therapy development. The compound shows ability to protect cells from oxidative stress and may support cellular resistance to infection and damage. It is also investigated for its anticancer effects, where it demonstrates the capacity to reverse multidrug resistance in tumor cells, enhancing the effectiveness of conventional chemotherapy agents. This resistance-modifying activity is particularly valuable in treating cancers that have become unresponsive to standard treatments. Additionally, cepharanthine has been used in traditional medicine contexts to manage conditions like alopecia areata and leukopenia, supporting immune function and promoting hair regrowth in some cases. Its broad biological activity profile makes it a versatile compound in both therapeutic research and experimental pharmacology.