[function_seven]

Isn't there a database of medications? Parse that and include it in the dictionary.

https://druginfo.nlm.nih.gov/drugportal/, for example.

[sk5t]

Like most things, it only seems simple from a distance. Between branded, generic, ingredient, and chemical names, there is diversity and ambiguity in drug naming.

[drewmol]

It seems you both are correct... And that's where the problem originates

[cknoxrun]

My Database/Company (https://www.drugbank.ca) contains a list of CC0 names they could use that are international, and it's updated daily.