Note that I'm not the one who posted the parent comment. Anyway, the Milton Friedman talk linked explicitly mentions the same beta-blockers example as my link

Note that I'm not the one who posted the parent comment. Anyway, the Milton Friedman talk linked explicitly mentions the same beta-blockers example as my link discusses and cites it as causing tens of thousands of deaths. He says it's been a disaster over "the last 20 years" - the talk was in 1978, so this is roughly the 1962-1978 period. And the "governmental supervision for health care" mentioned is broader than the FDA.