Definitely 100% true, first hand experience here.
I had mild medication prescribed for regulating blood pressure. Supposedly without psychological side effects.
I found out a year later that it dramatically affected my personality. More or less like in the article, but in the opposite way.
The frightening thing is, I didn't know !!!
I found out a year later when temporarily stopping the medication,
my kids started to make remarks, alluding on my changed behaviour. Only that moment I started to realize what happened.
Also affected my profesional live: I heard years later that people / collegues had noticed (but never mentioned it). I'm pretty sure it
impacted my career. All without me knowing. For medication without any known psychological effects.
I took this medication for a year without realizing anything was wrong, that will probably also be the case for other people,
and I'm pretty sure in many cases psychological side effects won't show up in clinical trials.
I'm pretty sure if you take anything like anti anxiety / depressants, psycho-pharmaceuticals, or just anything with known side effects,
the impact must be dramatic.
When I found out, discussed it with (several) docters : one said "impossible", another "interesting, tell me more".
It assume most doctors are clueless here. When you break a leg, they can set it and it heals. When you have a headache,
they look in their book to see if there is a pill. But anything out of the ordinary, it may be hard to find good medical help.