Drug discovery is an important area of study in the fields of pharmaceutical sciences and pharmacology. Experiments and trials are very crucial for the evaluation and assessment of novel drugs and pharmaceuticals. The chapters included in this book aim to shed light on some of the significant aspects and emerging trends in the field of drug experimentation and trials such as drug reaction, drug metabolism, extraction and production of medicinal compounds, etc. The case studies and clinical trials presented in this book, contributed by eminent experts and scientists will provide a comprehensive insight into the current advancements of this discipline; to the students and professionals engaged in this field at various levels.