RE:RE:RE:RE:Clinical Trial Size in Orphan and Rare Diseases For further distinction between Breakthrough Therapy and FastTrack designation, Breakthrough Therapy designation is requested by the drug company.
Breakthrough Therapy designation is to develop evidence needed to support approval as efficiently as possible, and the FDA will respond to Breakthrough Therapy designation requests within sixty days of receipt of the request.
ONCY has already received FDA FastTrack designation.