Correct Answer: C

Rationale: The correct answer is C. Clients with a history of asthma should avoid amoxicillin due to potential hypersensitivity reactions. Amoxicillin can trigger asthma exacerbations in some individuals. Hypertension (choice A), peptic ulcer disease (choice B), and gastroesophageal reflux disease (choice D) are not contraindications for amoxicillin use, so they do not require the nurse to clarify the medication prescription in this case.

Correct Answer: B

Rationale: In the scenario where a wrong medication has been administered, it is crucial for the healthcare provider to report the error to the provider. This action is essential to ensure that the provider is informed promptly, corrective measures are taken, and the client's well-being is safeguarded. Choice A is incorrect as taking no action could lead to serious consequences and compromise patient safety. Choice C, while important, should come after reporting the error to the provider. Choice D is not the immediate priority as the provider should first focus on addressing the error internally.

Correct Answer: C

Rationale: The correct answer is C: Peptic ulcer disease. Methotrexate can exacerbate peptic ulcer disease, leading to serious complications. This finding warrants questioning the administration of methotrexate to prevent harm to the client. Choices A, B, and D are not directly contraindicated with methotrexate use. Osteoporosis, hypertension, and immunosuppression are not typically reasons to question the administration of methotrexate for rheumatoid arthritis.

Correct Answer: D

Rationale: The correct answer is D, Lactic acidosis. Lactic acidosis is a rare but serious adverse effect of metformin use. Metformin is not known to cause hyperglycemia or hypoglycemia. Diarrhea is a common gastrointestinal side effect of metformin but is not as serious as lactic acidosis, which requires immediate medical attention.

Correct Answer: A

Rationale: The correct answer is A. The nurse should instruct clients to take iron on an empty stomach, 1 hour before meals to maximize absorption. This enhances the medication's effectiveness. Option B is incorrect because dark green stool is a common side effect of iron supplements and does not necessarily indicate a problem. Option C is incorrect as dietary fiber intake does not need to be decreased while taking iron supplements. Option D is incorrect because antacids can interfere with the absorption of iron and should not be taken at the same time.