Congratulations to Dr. Marta Kurczewska-Michalak for the successful defense of her doctoral thesis entitled “Identification of the phenomenon of polypharmacy and the most common drug interactions in patients undergoing pharmacological treatment for cancer” on January 15, 2024. The defense was conducted under the supervision of Prof. Przemysław Kardas, MD, PhD, as the main supervisor, and Dr. Paweł Lewek, MD, as the auxiliary supervisor. This accomplishment holds great significance not only for the doctoral candidate but, given the innovative nature of the chosen subject, also for the entire scientific community. We commend the outstanding work and extend our best wishes for continued success in the field of scientific research.