This book fulfils the needs of students, teachers of pharmacy and for those candidates who desire to attempt competition examination for job opportunities in the pharmacy profession. This mainly deals with organic substance used as a drug, the nomenclature of the drug, their general properties, storage condition, dose and uses discussed in this book. This book provides valuable information about organic medicinal compounds which includes: • Definitions of medicinal category. • Structures of some important medicinal compounds. • Physicochemical properties of medicinal compounds. • Stability and storage conditions of the medicinal compounds. • Important indications and medicinal use of medicinal compounds. • It also provides available dosage forms and popular brand names of medicinal compounds. • It also includes information about various diagnosis agents. • The study of organic substances that are mentioned in the Indian pharmacopoeia are discussed in this text