Right, and drugs affect different people in different ways. When trying to pin down a problem I was having, my doctor told me that one of the most important things he has learned is that any drug can have any effect.
Also: https://www.psychologytoday.com/blog/fighting-fear/201206/determining-the-real-side-effects-drugs After watching one of those commercials I still don’t know how many of those side effects are actually caused by the drug, and if they are, how commonly or in what sub-populations etc.
Similarly, years ago I read an article about waterless urinals (it was in an actual paper magazine, so no link sorry). A company installed them, and people immediately started complaining that the bathroom smelled. They called in the installer, and it turned out the smell was coming from the improperly installed and maintained toilets, not the urinals. So the smell had been there all along, but once the hardware changed people had something to blame it on.
