Katie responded to epinephrine diphenhydramine amino Phyllis’s and oxygen hydrocortisone and IV fluids. She was advised to never take penicillin…

Katie responded to epinephrine diphenhydramine amino Phyllis’s and oxygen hydrocortisone and IV fluids. She was advised to never take penicillin again. Explain why I’ve fluids were administered. If possible explain the role of the other medications.