These seem to apply in other countries too though.

I have no idea. For instance does France require special flight clearance after taking antidepressants even for non-psych gastrointestinal issues?

Seems pretty likely:

> the European Commission adopted Commission Regulation (EU) 2018/1042 of 23 July 2018, which lays down rules for Member States to carry out alcohol testing (and additional testing for other psychoactive substances) of flight crew and cabin crew members operating on board aircraft using aerodromes on their territory.

https://www.ecologie.gouv.fr/en/alcohol-and-drug-testing-fie...

I guess an antidepressant would count as a psychoactive substances.

I don't speak enough French to read the act itself though.