This book is produced to meet the demands of pharmacy students for academic reading material in the field of clinical pharmacy. The primary aim is to provide reading material in Malay for pharmacy students so that they can develop clinical skills while undergoing clinical training in hospitals and community pharmacies. All the chapters in this book cover important aspects in the formulation of clinical expertise especially to identify, prevent or solve problems arising from drug therapy.Thus all trainees should build a complete database and foster therapeutic communication with patients and other health professionals. A case study is also included to explain in greater depth the work process of drug therapy for pharmacist. On the whole, this book provides a platform in designing pharmaceutical practices to meet the needs and demands of patients in drug therapy.