Correct Answer: A

Rationale: The correct answer is A: Positive Trousseau's sign. When a patient receiving furosemide is developing hypokalemia, they may exhibit a positive Trousseau's sign, an indication of low potassium levels. This sign is elicited by inflating a blood pressure cuff above systolic pressure for a few minutes, resulting in carpal spasm. Choices B, C, and D are incorrect. Hyperactive reflexes are associated with hyperkalemia, not hypokalemia. Hypoactive bowel sounds are not specifically related to hypokalemia. Decreased deep-tendon reflexes are not typically seen in hypokalemia.

Correct Answer: A

Rationale: The correct answer is A: 'Take this medication on an empty stomach.' Levothyroxine should be taken on an empty stomach to enhance absorption. Taking it with food or at bedtime can interfere with its absorption. Calcium supplements should also be avoided when taking levothyroxine as they can reduce its absorption.

Correct Answer: D

Rationale: During a panic attack, the sympathetic nervous system is activated, leading to physiological responses such as dilated pupils. Bradycardia (slow heart rate) and hypotension (low blood pressure) are not typically associated with panic attacks. While chest pain can occur during a panic attack due to rapid breathing and muscle tension, dilated pupils are a more specific finding related to sympathetic activation in this context.

Correct Answer: D

Rationale: Administering methylergonovine intramuscularly helps contract the uterus, reducing the risk of postpartum hemorrhage. Monitoring for signs of infection (Choice A) is important but not directly related to preventing postpartum hemorrhage. Uterine massage (Choice B) is beneficial to prevent uterine atony, but methylergonovine is a more specific intervention to prevent hemorrhage. Applying ice packs to the perineum (Choice C) is helpful for perineal pain and swelling, not for preventing postpartum hemorrhage.

Correct Answer: A

Rationale: Correct answer: When administering an intramuscular injection, the needle should be inserted at a 90-degree angle to ensure proper delivery of the medication into the muscle tissue. Option B is incorrect because a 45-degree angle is typically used for subcutaneous injections, not intramuscular. Option C is incorrect as aspiration is not recommended for intramuscular injections. Option D is incorrect as massaging the site after an intramuscular injection can cause tissue damage or interfere with the absorption of the medication.