This reference book is prepared for students, practitioners, teachers and researchers in the field of medical and health science. Pharmacy is as old as human life. However, it was only known as a discipline at the beginning of 19th century in Ethiopia. Although pharmacy is the third largest health profession in the world, most understand it as if it is equivalent to pharmacology. Although described as a separate field by some, pharmacology is still a branch of pharmacy. Pharmacy is all about every aspects of drugs, whereas pharmacology is specifically about the interaction between drugs and living organisms or cell. Notwithstanding with the aforementioned concepts, pharmacology is the main filament that kept pharmacy in clinical practice. Had it not been for pharmacology, pharmacy would have been a purely product based applied science many years ago. The main goal of this book is thus, to provide concise information regarding the basic differences between pharmacy and pharmacology. The book has two parts. The first part describes pharmacy in relation to pharmacology and the second part is specifically about pharmacology.