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'.
(..) You've been sniffing too much of that nail polish. And, anyway, nothing is going to happen to me. You know why? Because I take my medicine every day. Grandma, she's here. - What? - Susie. Susie's in the in-between. (..)2009 The Lovely Bones