Why not "the unicorns take the drug every day"?
Both 'use drugs' and 'take drugs' work in English.
is the word for drug (illicit drug) and medicine interchangeable like it is in english?
Are "lægemiddel" and "medicin" used interchangeably?
Mostly yes. There are of course situation where either is used more.
"medicine" instead of "drug" was rejected today (25 August 21). Why?