Drugs, drugs, why art thou so difficult?

So I am knee deep in studying for my first pharmacology test and I often wonder why drugs have names that don't go along with their form or function. What does Atropine, Hexamethonium, or Trihexyphenidyl really tell me? Not much. Which is why I am feverishly memorizing these and many, many more drugs today, tomorrow, and the next day. At least this feels like stuff a doctor should actually know.