Neem tree is a well known tree in India and recognized by different names in different states of India as well as different parts of the world. Almost every Indian knows the tree for its medicinal values. According to Susruta a known Hindu physician (800 B.C.), a decoction of nimba (neem) is prescribed in Kustha leprosy. Neem is thus, perhaps the oldest plant used as medicine in India. The earliest authentic record of information is in Arthashtra treatise of polity of Kautilya or Chankya known as Indian Machiavelli has mentioned extraction of neem oil for medicinal purposes 4th century B.C. It is thus perhaps the oldest oil used as medicine.

That the book will find favour by traditional users of neem products, Ayurvedic, Unani and Sidha system of medical practitioners as well as doctors and researchers for better and effective utilization of the tree as a source of safe medicine.