Machine learning is transforming pharmaceutical development by helping researchers analyze complex datasets, identify potential drug candidates, and improve decision making throughout the research process. From early drug discovery to clinical trials and manufacturing, these technologies can support efficiency, accuracy, and innovation. While machine learning does not replace scientific expertise, it provides valuable insights that assist researchers in handling large amounts of biological and clinical information. This guide explains how machine learning is applied across different stages of pharmaceutical development, highlights its practical benefits, and discusses important considerations such as data quality, regulatory compliance, and ethical use in healthcare research.