This book having entitles “A Text Book of Pharmaceutics-I” (As Per Pharmacy Council of India, PCI Regulations). This text book is designed to impart a fundamental and theoretical knowledge on the art and sciences of various pharmaceutical dosage forms used in pharmaceutical industry as well as marketed level. This Pharmaceutics subjects deals with the various physical and physicochemical properties and their formulations/evaluations. The practice of the subject helps the students to get a better insight into the various areas of formulations research, development and stability studies of pharmaceutical dosage forms. The main objectives of the completion of this course students shall be able to: Known the complete history of pharmacy profession since lastly. Understand the basics of different dosage forms, pharmaceutical incompatibilities and pharmaceutical calculation involving in it. Understand the professional ways to handling the prescriptions. This text book consists the various chapter in the form of units such as: Historical background and development of profession of pharmacy, Dosage forms, prescriptions, posology, pharmaceutical calculations, powders, liquid dosage forms, monophasic and Biphasic liquids, emulsions, suspensions, suppositories, pharmaceutical incompatibilities and semi-solid dosage forms. This book is designed according to the pharmacy council of India (PCI) curriculum of undergraduate courses in pharmacy specially for B. Pharm students, which mainly useful all over India. We sincerely request reader to send their valuable suggestions and constructive comments for making improvement in the text edition of the book. We extend out good wishes to the students and professor and sincerely hope to have the continued support from them and to our other books in future.