I'm working on a science discussion question and need an explanation and answer to help me learn.

Board Topic to be answered

Mr. Y is receiving penicillin for the first time. He was diagnosed with gonorrhea. He is to receive the parenteral form of the drug penicillin G. You are the nurse responsible for his care.

Mr. Y states that he has never received penicillin before. Is he at risk of developing a reaction with this first dose?
 

Mr. Y asks why he needs an injection. He would like the PO form because he does not want to have an injection. How should you respond?