Clinical trials and toxicological evaluations are essential processes in the development of safe and effective medical treatments. Toxicological studies, often starting in preclinical models, focus on identifying harmful effects, determining dose-response relationships, and establishing safety margins. Clinical trials, conducted in phases, assess the efficacy and safety of therapeutic interventions in humans. Together, these evaluations ensure that pharmaceutical products and medical procedures meet strict safety and performance standards before public use. This integrated approach not only minimizes risks to patients but also supports regulatory approval and enhances trust in modern biomedical research and healthcare innovations.