This book deals with various kinds of antibiotics by classes with their generic and most common brand name(s). This book divided into total twelve chapters, from which the first eleven chapters are divided according to the class of antibiotic(s) while last chapter twelve includes other antibiotics those are not covered in above chapters. Each chapter describes the antibiotics of a particular class. Chemical structure, generic name, brand name and common application(s) of antibiotics are described in all chapters. Most of the common antibiotics are covered in this book.