s/This popular painkiller/Acetaminophen, the active ingredient in Tylenol,/
I, for one, never studied chemistry.
I, for one, never studied chemistry.
In much the same way that nobody calls aspirin "acetylsalicylic acid", paracetamol is the generic name, except in the US for some reason.
This happens in the UK/IE as well.
As a comparison.
Panadol (UK/IE) brand name for acetaminophen: https://www.google.de/search?q=panadol&tbm=isch
Walzyr. US "generic" anti-histamine: https://pics.drugstore.com/prodimg/419979/450.jpg
Claratin. US Brandname anti-histamine: https://images-na.ssl-images-amazon.com/images/I/91rArvDAp9L...
The US also tends not to have true generic drugs, but 'store brand' generics. So a store will carry Tylenol + a single store brand generic, instead of Tylenol + 5 different companies generic brands.