I don't have a full class prepped for this, especially not in light of the coronavirus testing debacle. Instead, here are some useful resources for understanding the history of why we have an FDA in the first place, what it does, and maybe where we should go in the future:

Ye olden days, before drug regulation:
The Poisoner's Handbook, by Deborah Blum, and the resulting PBS series, touch on the toxic stuff that was around before regulations took hold: https://www.pbs.org/wgbh/americanexperience/films/poisoners/(sorry that these are paywalled; you should be able to borrow the book from a variety of e-library services, such as Libby: https://bpl.overdrive.com/ )

I have yet to read her newer, more relevant book The Poison Squad(I'm waiting for it on Libby), but given how good The Poisoner's Handbook is I feel ok recommending that as well.

The most infamous bad drug: Thalidomide:
In the 1950s, thalidomide was a drug marketed to pregnant women to treat morning sickness. It ended up causing severe birth defects (due to a chemistry issue), but was mostly blocked from the market in the U. S. by the FDA.
https://en.wikipedia.org/wiki/Thalidomide
Scholarly article:"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4737249/