Correct Answer: B

Rationale: In this situation, the nurse should prioritize administering Hydromorphone (choice B), an opioid analgesic, to manage the severe pain effectively. Opioids are the first-line treatment for severe pain, especially in end-stage conditions like osteoporosis. Promethazine (choice A) is an antihistamine and antiemetic, not a potent analgesic. Ketorolac (choice C) is a nonsteroidal anti-inflammatory drug (NSAID) that may not provide sufficient pain relief in severe cases. Amitriptyline (choice D) is a tricyclic antidepressant used for neuropathic pain and depression, but it is not the first choice for managing severe pain in this scenario.

Correct Answer: C

Rationale: The correct answer is to instruct the client to restrict protein intake. In chronic renal failure, the kidneys are unable to effectively filter waste products, so limiting protein helps reduce the buildup of waste in the body. Increasing calcium intake (Choice A) is not typically necessary unless there is a specific deficiency. Providing a diet high in potassium (Choice B) is contraindicated as potassium levels need to be monitored and controlled in renal failure. Increasing fluid intake (Choice D) may be necessary depending on the individual's condition, but restricting protein intake is a more critical dietary instruction for clients with chronic renal failure.

Correct Answer: A

Rationale: The correct answer is A: Spinach. Spinach is rich in calcium, making it a suitable choice for individuals with lactose intolerance who need to avoid dairy products. Peanut butter, ground beef, and carrots are not significant sources of calcium compared to spinach, and therefore, not the best recommendation for increasing calcium intake in lactose-intolerant individuals.

Correct Answer: C

Rationale: The correct instruction for a client prescribed with doxazosin is to rise slowly when sitting up. Doxazosin can cause orthostatic hypotension, leading to dizziness upon sudden position changes. Instructing the client to rise slowly helps prevent this side effect. Choices A, B, and D are incorrect because they are not directly related to the potential side effects or administration of doxazosin.

Correct Answer: C

Rationale: When toxicity from magnesium sulfate occurs, the nurse should administer calcium gluconate IV as it is the antidote for magnesium sulfate toxicity. Positioning the client supine may not address the toxicity issue. Administering dextrose 5% is not the appropriate intervention for magnesium sulfate toxicity. Methylergonovine is used to manage postpartum hemorrhage and is not indicated for magnesium sulfate toxicity.