The FDA recently published a draft guidance document for “Drug Products, Including Biological Products, that Contain Nanomaterials.” The draft guidance document can be downloaded here: https://www.fda.gov/ucm/groups/fdagov-public/@fdagov-drugs-gen/documents/document/ucm588857.pdf
The FDA is requesting public comments on the draft guidance. They are also seeking comment on the terminology, including the term “nanomaterial”, as used in the draft guidance. The Federal Register notice can be found here: https://www.federalregister.gov/documents/2017/12/18/2017-27133/drug-products-including-biological-products-that-contain-nanomaterials-draft-guidance-for-industry
Comments are due by March 19, 2018.