Act IV, A Shrew is a Shrew Does

Petruchio becomes the Shrew because he gets stubborn and does not agree with other people. He becomes more of the shrew because he gets mean and nasty with the other characters. I believe that he should calm down and become himself again. He should realize that he is becoming his old self and should calm down. 

There were no medications in this time so there would be no way to calm Petruchio down. Petruchio is getting used to the big time of Baptista and Katherina so he really has to realize what he is really like