Reply To: Post-Packaging ID Testing Share ideas, questions and answers Search for: Home Page › Forums › Packaging › Post-Packaging ID Testing › Reply To: Post-Packaging ID Testing Jennifer Kennedy-HathcockParticipant Reply To: Post-Packaging ID Testing December 1, 2022 at 7:28 pm I’ve typically seen PPID testing only when conducting a blinded study – to confirm X is active and Y is placebo.