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'.
(..) for the money they owed me. Isn't that right, Ashley? What are you running, a charitable institution? Go back to the store, then go home and take your medicine. You're not looking very well. But, sugar, shouldn't you come home with me? Great balls of fire. Don't bother me (..)1939 Gone with the Wind
(..) waitin' on the poor white trash. Shut up, dogs! Barkin' in the house like that. Get up from there. Don't you hear that Miss Ellen's comin'? Get out there and get her medicine chest. We was gettin' worried about you, Miss Ellen. -Mist' Gerald-- -All right, Pork. I'm home. (..)1939 Gone with the Wind