But this is the entire issue, they knew this from the get-go and made billions based on fraud.
How many Nyquil/Dayquil and other decongestant commercials have you seen in your life time... Ive seen thousands. to the point their jingle and tagline are still easy to recall.
The issue here is fraud, most of the marketed products were oral.
So, here is a conspiracy: If they knew that it was useless, but sounded good on the label - then maybe they could get away with putting even less of the substance, if any, in the products to save costs?
I would assume the FDA would require batch testing at some interval?