This article was written in 2015 I’m sure the numbers are even higher now.
http://time.com/4072487/supplements-cause-more-than-23000-er-visits-a-year/ (excerpt below)
“Dietary supplements in the United States require no safety testing or FDA approval before being sold and marketed. Providing reasons for the use of the ingredients—citing historical use, for instance—is considered enough. If supplements are found to be unsafe, the FDA can remove them from market”.
BTW: Supplements are not medication.
