Pharmacology describes the interaction between drugs and organisms. Knowledge of pharmacology is a must for medical, nursing, pharmacy and all other healthcare students, practitioners and professionals. A pharmacy student should study pharmacology to: Work in coordination with doctors and other healthcare professionals. Work as a Medical Representative. Work in the field of Pharmacovigilance. Interact with people as a chemist. This book provides basic knowledge about different classes of drugs available for the pharmacotherapy of common diseases. The indications for use, dosage regimen, routes of administration, pharmacokinetics, pharmacodynamics, and contraindications of the drugs discussed in this book are vital for successful professional practice. It is hoped that the book will be received favourably as an effective textbook by both students and teachers of the subject.