A client has partial thickness burns to both arms. After medicating the client with an opioid analgesic, the practical nurse (PN) changes the sterile dressings. Which action is most important for the PN to implement before applying silver sulfadiazine cream to the burn lesions?

A. Apply the cream to the sterile dressings using a sterile tongue blade: Silver sulfadiazine is applied directly to the burn, not to the dressing. B. Remove the previous layer of medication using sterile normal saline: Old cream must be removed to ensure medication effectiveness and prevent debris accumulation. C. Open all the supplies before donning sterile gloves: Helps maintain sterile field but is not the most important step before application. D. Evaluate the client's response to the medications: Pain relief should be assessed, but cleansing is the critical preparation step before new application.