You may be interested in an article by the person being interviewed in the OP, which has a few more details and at least one specific instance of impurities: h

You may be interested in an article by the person being interviewed in the OP, which has a few more details and at least one specific instance of impurities: https://www.nytimes.com/2019/05/11/opinion/sunday/generic-drugs-safety.html https://www.nytimes.com/2019/05/11/opinion/sunday/generic-dr...