A nurse is caring for a client who requires a transfusion of one unit of packed RBCs. The nurse receives the following prescription: “Diphenhydramine 50 mg by mouth once, one hour prior to transfusion.”. The nurse should identify this as which of the following types of prescription?

Choice A rationale A standing prescription is an order that applies to all patients who meet certain criteria and is not specific to a single administration. It is used for routine treatments and does not apply to a one-time pre-transfusion medication. Choice B rationale A stat prescription is an urgent order that requires immediate administration, typically within minutes. It is used for emergency situations and does not apply to a pre-transfusion medication given one hour before the procedure. Choice C rationale A single prescription is a one-time order for a specific medication to be given at a specific time. In this case, diphenhydramine 50 mg by mouth once, one hour prior to transfusion, fits the definition of a single prescription. Choice D rationale A PRN (pro re nata) prescription is an order for medication to be given as needed based on the patient’s condition. It is not applicable to a scheduled pre-transfusion medication. .