Comments on Radiolabeled Studies Draft

Janssen says an FDA draft guidance on clinical pharmacology considerations for human radiolabeled mass balance studies is well written and provides sponsors with much-needed guidance when conducting mass balance studies. The firm’s comment also has specific suggestions for strengthening the draft.

AbbVie says recent microtracer approaches using accelerator mass spectrometry should be addressed in the guidance. It includes other line-by-line comments.

Takeda asks for some clarifications and gives specific line-by-line comments.

AstraZeneca provides general comments on definition of terminology and number of evaluable subjects and line-by-line comments.

Finally, Pfizer gives line-by-line specific comments.

Read more