Pharmaceutical sciences include the various areas of study that focus on the action, design, delivery and disposition of drugs. It applies knowledge from different biological fields such as anatomy, physiology, biochemistry, cell and molecular biology. It also uses tools from other subjects such as physics, chemistry, mathematics, chemical engineering and epidemiology. There are four main branches of pharmaceutical sciences- pharmacology, pharmaceutical chemistry, pharmaceutics, and pharmacognosy. The biochemical and physiological effects of drugs on humans are studied under pharmacology. Pharmaceutical chemistry studies the drug design to optimize pharmacokinetics and pharmacodynamics and synthesis of new drug molecules. Pharmaceutics focuses on the study and design of drug formulation for the best delivery, pharmacokinetics, stability and patient acceptance. Pharmacognosy is related to the study of medicines derived from natural sources. This book contains some path-breaking studies in the field of pharmaceutical sciences. It presents researches and studies performed by experts across the globe. Researchers and students in this field will be assisted by this book.