The movie is about a playboy who gets 'a taste of his own medicine' when the girl he falls in love with jilts him for another guy.
If he loses the case, he should just 'take his medicine' and stop complaining.
Their research has led to many important advances in modern 'medicine'.
(..) Just when I thought I was out, they pull me back in. Our true enemy has not yet shown his face. Michael! - Has he had his medicine? - I don't know what he took. - I've got my wind back. - Call a doctor. - Run, run, run! - Vincent! Run at thunder, girl! Thunder can't hurt! Harmless noise! (..)1990 The Godfather Part III