Professor Regina Appiah-Opong, PhD, FGA, is a distinguished Toxicologist with over three decades of service at the Noguchi Memorial Institute for Medical Research, University of Ghana. She has held leadership roles, including Head of the Department of Clinical Pathology and serves as an adjunct professor at two Ghanaian universities. A fellow of the Ghana Academy of Arts and Sciences, her research spans toxicology and pharmacology, with a focus on drug discovery from plant sources, drug interactions, pharmacokinetics, and antioxidant studies. Her investigations into cytochrome P450-mediated drug interactions have shed light on the effects of Ghanaian medicinal plants on drug metabolism. She has pioneered research into the anticancer properties of traditional medicinal plants, identifying bioactive compounds and their mechanisms of action. Her work also includes anti-plasmodial screening of medicinal plants. She played a key role in the construction of a DNA cassette vector useful for drug susceptibility testing of anti-HIV drugs, using molecular biology tools. This research revealed that HIV-1 proteases from drug-naïve West African patients exhibit reduced susceptibility to protease inhibitors and are genetically distinct from the subtype B strain common in Caucasian populations—findings that had implications for the deployment of highly active antiretroviral therapy (HAART) in the region. Prof. Appiah-Opong has published extensively and engaged in postdoctoral training at Yale University’s Department of Pharmacology, where she conducted chemical and biological fingerprinting of Ghanaian medicinal plants. Her career reflects a deep commitment to advancing biomedical research through interdisciplinary collaboration and innovation.