The reason for that is there are all kinds of rules about what you can name your drug. Can't sound like anything else. Can't suggest any effects it doesn't ha

The reason for that is there are all kinds of rules about what you can name your drug. Can't sound like anything else. Can't suggest any effects it doesn't have. Etc. Made up words are pretty much the only safe bet. From there you want to make up a word that's memorable and short so it stands out and people remember it.