Synopsis The Indian Pharmacopoeia is the official book of standards for the drugs included therein in terms of the Second Schedule to the Drugs and Cosmetics Act, 1940 so as to specify the standards of identity, purity and strength for the drugs imported, manufactured for sale, stocked or exhibited for sale or distributed in India. Compliance with these standards by the industry is thus an assurance to the healthcare professionals, patients and consumers of their quality. As in the past, the choice of new articles has been governed by a system of priorities based on the therapeutic merit, medical need and extent of use of such articles in the country. Modern test methods have also been selected keeping in view the availability of sophisticated instruments and the resources that the industry and government laboratories can command. The principle of 'openness, justice and fairness' is kept into consideration while compiling and editing of this Addendum. The Addendum is the result of the labours of the members of the Expert Committees, the professionals of the industry, the public and private testing laboratories, and of the active and effective members of the Central Indian Pharmacopoeia Laboratory (CIPL). The services of all these participants is greatly appreciated and gratefully acknowledged.