1. Antibiotics 2. Microlides and Miscellaneous 3. Prodrug Concept in Drug Design 4. Anti-Material Drugs 5. Antitubercular Agents 6. Urinary Tract Anti-infective Agents 7. Antiviral Agents 8. Antifungal Agents 9. Anti-Protozoal Agents 10. Anthelmintics 11. SUlphonamides and Sulfones 12. Introduction to Drug Design 13. Combinatorial Chemistry Index References Book Summary: This book is having total 13 chapters. All the chapters are having general introduction, History and drug development, general mechanism of action, detailed classification, synthesis and uses of drugs prescribed. In the end of the all the chapters, summery is given which includes structure, mechanism of action and uses of individual drugs. In this book, we tried to give detailed knowledge about QSAR, Molecular modeling and Combinatorial chemistry.