Introduction: Self-medication is a global phenomenon that poses serious public health implications, especially in the context of diseases like acute diarrheal illnesses in children. In this regard, parents' decision to self-medicate their children without the supervision of a healthcare professional can result in severe consequences, including prolonged hospitalization of the children. This practice not only increases associated risks and costs but can also negatively impact the disease progression and the effectiveness of treatment. Objective: To determine the impact of self-medication on the duration of hospitalization of children with acute diarrheal illness in a hospital in Loreto, 2024-2025. Study Population: The study population will include 534 pediatric patients diagnosed with acute diarrheal illness admitted to the Pediatric Service of the Loreto Regional Hospital, 2024-2025. Th...