This book covers basic and general pharmacology, from a cellular and molecular perspective, with a focus on mechanisms of drug action the fundamental basis for proper clinical use. As opposed to classical pharmacology textbooks, which spend more time detailing medical and therapeutic effects, the authors here offer thorough discussion of drug action mechanisms at cell and molecular level and discuss the rules governing drug pharmacokinetics and development. Based from an Italian language book that has gone through 4 successful editions, this book includes classical and well-defined drugs along with novel approaches such as antibodies, decoy receptors, nanoparticles, RNA interference (RNAi), regenerative medicine, personalized therapy, and principles of toxicology.