The book of the biological analysis of drugs in chemistry as well as in medicinal field. This book is dedicated to all who have a genuine interest in learning sharing information about the discovery of new biological active compounds and the methods that lead to new drugs in advances. The book opens with essays by Mr. Kirtikumar Goswami, Dr. Krunalkumar R. Mehariya, Mrs. Bhagwati K. Gauni Mehariya, Dr. Dipak Vachaani and Mr. Sunil Galani.