Page 6. The WHO Drug Dictionary. (WHO-DD) • A database with information about medicinal. products from all over the world.

Who DD is used for?

The dictionary is used to identify drug names and evaluate medicinal product information, including active ingredients and products' anatomical and therapeutic classifications, from nearly 150 countries. WHODrug data covers both conventional medicines and herbal remedies.

Who DD classification?

The Dewey Decimal Classification (DDC), colloquially the Dewey Decimal System, is a proprietary library classification system first published in the United States by Melvil Dewey in 1876.