A woman with severe preeclampsia is being treated with bed rest and intravenous magnesium sulfate. The drug classification of this medication is
Antihypertensive
Anticonvulsant
Tocolytic
Diuretic
The Correct Answer is B
Choice A) Antihypertensive: This is not the correct classification of magnesium sulfate. Antihypertensives are drugs that lower blood pressure, such as beta blockers, calcium channel blockers, or angiotensin-converting enzyme inhibitors. Magnesium sulfate does not have a significant effect on blood pressure, and it is not used as a primary treatment for hypertension in preeclampsia.
Choice B) Anticonvulsant: This is the correct classification of magnesium sulfate. Anticonvulsants are drugs that prevent or reduce the frequency and severity of seizures, such as phenytoin, valproic acid, or carbamazepine.
Magnesium sulfate is used as a prophylactic and therapeutic agent for eclampsia, which is a life-threatening complication of preeclampsia characterized by seizures. Magnesium sulfate acts by blocking the neuromuscular transmission and reducing the cerebral edema and vasospasm.
Choice C) Tocolytic: This is not the correct classification of magnesium sulfate. Tocolytics are drugs that inhibit uterine contractions and delay preterm labor, such as terbutaline, nifedipine, or indomethacin. Magnesium sulfate is not effective as a tocolytic agent, and it is not recommended for this purpose by the American College of Obstetricians and Gynecologists.
Choice D) Diuretic: This is not the correct classification of magnesium sulfate. Diuretics are drugs that increase urine output and reduce fluid retention, such as furosemide, hydrochlorothiazide, or spironolactone. Magnesium sulfate does not have a diuretic effect, and it can cause fluid overload and pulmonary edema if administered in excess.

Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice a) Document the event in the nurses' notes is incorrect because this is not a priority action for a neonate who is showing signs of hypoglycemia. Hypoglycemia is a condition where the blood glucose level is lower than normal, which can cause neurological and metabolic problems in newborns. Neonates of diabetic mothers are at higher risk of developing hypoglycemia due to increased insulin production and decreased glycogen stores.
Documenting the event in the nurses' notes is an important step, but it should be done after assessing and treating the neonate's condition.
Choice b) Test for blood glucose level is correct because this is the most important action for a neonate who is exhibiting symptoms of hypoglycemia. The nurse should use a heel stick or a cord blood sample to measure the blood glucose level of the neonate as soon as possible, as hypoglycemia can lead to serious complications such as seizures, coma, brain damage, or death if left untreated. The normal blood glucose range for a full-term neonate is 40 to 60 mg/dL in the first hour of life, and 50 to 90 mg/dL thereafter. A blood glucose level below 40 mg/dL indicates hypoglycemia and requires immediate intervention.
Choice c) Notify the clinician stat is incorrect because this is not the most urgent action for a neonate who is suffering from hypoglycemia. The nurse should notify the clinician after confirming the diagnosis of hypoglycemia and initiating treatment, such as feeding or administering intravenous glucose. The clinician may order further tests or treatments depending on the severity and cause of the hypoglycemia, but the nurse should not delay the initial management of the neonate's condition.
Choice d) Start an intravenous line with D5W is incorrect because this is not the first-line treatment for a neonate who has hypoglycemia. D5W stands for dextrose 5% in water, which is a solution that contains glucose and water. It can be used to treat hypoglycemia by providing a source of energy and fluid to the neonate. However, before starting an intravenous line with D5W, the nurse should first attempt to feed the neonate with breast milk or formula, as this can also raise the blood glucose level and provide other nutrients and antibodies. If feeding is unsuccessful or contraindicated, then the nurse should start an intravenous line with D5W as ordered by the clinician.

Correct Answer is C
Explanation
Choice a) Consult the physician, because the dose is too high is incorrect because this is not a necessary or appropriate action for a nurse who is following a valid order for betamethasone. Betamethasone is a corticosteroid that can be used to accelerate fetal lung maturation and reduce the risk of respiratory distress syndrome and other complications in preterm infants. The recommended dose for betamethasone is 12 mg IM every 24 hours for two doses, which is exactly what the physician ordered. Therefore, there is no reason to question or consult the physician about the dose, as it is within the normal range and based on evidence-based practice.
Choice b) Schedule the second dose for 11 am on the next day is incorrect because this is not a correct or accurate way to implement the order for betamethasone. Betamethasone should be given at least 24 hours apart, but not more than 48 hours apart, to achieve optimal fetal lung development and neonatal outcomes. Scheduling the second dose for 11 am on the next day would result in a 24-hour interval between the doses, which is acceptable, but not ideal. The best time to schedule the second dose would be between 24 and 48 hours after the first dose, such as at 11 pm on the same day or at 7 am on the next day.
Choice c) Prepare to administer the medication intramuscularly between contractions is correct because this is the best and most appropriate way to implement the order for betamethasone. Betamethasone should be given by intramuscular injection in a large muscle mass, such as the deltoid or gluteus, using a 21-gauge needle and a syringe with an air lock. The injection site should be cleaned with alcohol and aspirated before injecting. The medication should be administered between contractions, when the uterine blood flow is maximal and the fetal absorption is optimal. The nurse should also monitor the woman and the fetus for any adverse effects of betamethasone, such as maternal hyperglycemia, hypertension, infection, or edema, or fetal tachycardia, hypoglycemia, or infection.
Choice d) Explain to the woman that this medication will reduce her heart rate and help her to breathe easier is incorrect because this is not a true or relevant statement about betamethasone. Betamethasone does not have any direct effect on the maternal heart rate or respiratory function, as it is mainly intended to improve the fetal lung maturation and reduce the risk of respiratory distress syndrome and other complications in preterm infants.
Betamethasone may cause some side effects such as increased blood pressure, blood sugar, or fluid retention in the mother, which may affect her cardiovascular or respiratory status indirectly. However, these effects are usually transient and mild, and do not outweigh the benefits of betamethasone for the fetus. Therefore, this statement is misleading and inaccurate.
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