A nurse is teaching about medications to a group of clients. Which of the following statements by a client indicates a need for further teaching?

Choice A reason: Propranolol is a beta-blocker commonly used to manage hypertension and is appropriate. Choice B reason: Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) used for arthritis pain and inflammation. Choice C reason: Aspirin can irritate the gastric mucosa and increase the risk of bleeding, especially in clients with peptic ulcers. It is contraindicated in this context. Choice D reason: Morphine is appropriate for managing severe pain during sickle cell crises.