The fourth edition of this book (theory) is strictly written according to new syllabus framed by Pharmacy Council of India (PCI) as per ER-2020. This book is presented and published to meet the requirements of students of first year Diploma in Pharmacy (D Pharm). The book, written in a simple and lucid language, attempts to demystify and simplify the basic concepts for the students of pharmacy for proper understanding of the subject and to get a sure success in the State Board Examinations. Salient features of the book All topics are described in an easy to understand language. Gives to-the-point answers. Covers all the requisite contents as per new syllabus. Shows success key in Board Examination. This book, as well as CBS Confident Pharmacy Series, will be useful not only for the students and teachers but also for candidates desiring to attempt competitive examinations for job opportunities in pharmacy profession such as hospital pharmacists in PHCs, civil hospitals, etc.