The first edition of this book is written, presented and published to meet the requirments of students of B.PHARM. in accordance with the new revised syllabus under Pharmacy council of India, written in lucid and simple language, it attempts to demystify and simplify the basic concepts for the students of pharmacy for proper understanding of the subject and to get sure success in the state universities and boards examination. This book will be useful not only to both the students and the teachers of B.Pharm, but alsto the candidates desiring to attempt competitive examination (GPAT).