WARNING: I'm on my "stringent ethical standards" soapbox today.
IMHO, Drug companies are private entities and have no legal or moral imperative requiring them to divulge anything other than incidents of real or potential harm to others, e.g. employee injuries and chemical spills into the community...
Unleeesssss...
they want government approval/licensing for something. Then they must be held accountable to reveal ALL the information on the subject. If they are found to have buried information, they should be fined on the order of $10,000 per enrolled subject in the entire project (every clinical study ever done on the molecule) and those found guilty of a pattern of withholding evidence or conspiracy to withhold evidence should be individually charged with a felony.
If I want to get a building permit, I can't refuse or neglect to show the inspector the electrical and plumbing work. That's the whole point of inspection and/or review.