The Naranjo Scale is a structured tool for assessing the causality of adverse drug reactions. It consists of 10 questions that evaluate factors such as the timing of the reaction, dose changes, reappearance after readministration, and alternative causes. Each response generates a score to determine the likelihood that the drug caused the reaction. By systematically analyzing data like drug toxicity, previous reactions, and placebo responses, healthcare professionals can make accurate conclusions about drug causality. This tool ensures a reliable, evidence-based approach to pharmacovigilance, supporting clinical decisions and improving patient safety in adverse event assessments.