The U.S. Food and Drug Administration (FDA) has opened the test submission phase of the new Electronic Submission Gateway NextGen system (ESG NextGen) in preparation for the official launch at 9:00 a.m. ET on April 14, 2025. The testing phase will conclude after April 11, and the existing (legacy ESG) system will be disabled at midnight Eastern time (ET) on April 12. No submissions can be made i..