I need help with this question/situation. I think this would be appropriate, but not sure Jane Morgan is admitted to the oncology unit for chemotherapy. Before administering a chemotherapeutic agent that is known to cause allergic symptoms in patients, diphenhydramine (Benadryl) is ordered. Discuss the rationale for this order. If anaphylaxis develops in this client, would administering additional Benadryl help? If not, what medication (including strength and dose) is recommended.