A nurse is caring for a client who reports a headache and has a history of a peptic ulcer. Which of the following medications should the nurse administer?

A. Ibuprofen: This NSAID can irritate the gastric lining and increase the risk of bleeding, making it inappropriate for clients with a history of peptic ulcers. B. Acetaminophen: It is not an NSAID and does not affect the gastrointestinal lining, making it a safer option for pain relief in clients with peptic ulcer disease. C. Ketorolac: Like other NSAIDs, ketorolac increases the risk of gastric bleeding and should be avoided in clients with peptic ulcers. D. Aspirin: Aspirin is an NSAID and antiplatelet agent that can worsen peptic ulcers and increase bleeding risk, so it should not be used in this client.