Which of the following medications is not categorized as a tocolytic?
Oxytocin (Pitocin)
Magnesium Sulfate
Nifedipine (Procardia)
Indomethacin (Indocin)
The Correct Answer is A
Choice A rationale:
Oxytocin is a hormone that stimulates uterine contractions. It is not a tocolytic, which is a medication that inhibits uterine contractions. In fact, oxytocin is often used to induce labor or to augment labor that is progressing slowly.
It acts on the myofibrils in the uterine muscle, causing them to contract more forcefully and frequently. This leads to cervical dilation and effacement, and ultimately to the birth of the baby.
Oxytocin is typically administered as an intravenous (IV) infusion. The dosage is carefully titrated to achieve the desired effect on the uterus.
It is important to note that oxytocin can have serious side effects, including uterine hyperstimulation, fetal distress, and postpartum hemorrhage. Therefore, it should only be used under the close supervision of a healthcare provider.
Choice B rationale:
Magnesium sulfate is a tocolytic that is often used to prevent preterm labor. It works by relaxing the smooth muscle of the uterus.
It is typically administered as an IV infusion. The dosage is carefully monitored to ensure that the magnesium level in the blood does not become too high.
Side effects of magnesium sulfate can include flushing, nausea, vomiting, and headache. In rare cases, it can also cause serious complications such as respiratory depression and cardiac arrest.
Choice C rationale:
Nifedipine is a calcium channel blocker that is sometimes used as a tocolytic. It works by relaxing the smooth muscle of the uterus and blood vessels.
It is typically administered as an oral tablet. Side effects of nifedipine can include headache, dizziness, flushing, and low blood pressure.
Choice D rationale:
Indomethacin is a nonsteroidal anti-inflammatory drug (NSAID) that is sometimes used as a tocolytic. It works by inhibiting the production of prostaglandins, which are substances that promote uterine contractions.
It is typically administered as an oral tablet or suppository. Side effects of indomethacin can include nausea, vomiting, heartburn, and diarrhea.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Requesting an order for morphine sulfate IV 2 mg over 1-5 minutes would not be appropriate at this time for several reasons: The patient has already received a dose of 4 mg 15 minutes ago, and it has not been effective in relieving the chest pain.
The patient is showing signs of increased respiratory effort, which could be a sign of respiratory depression. Administering an additional dose of morphine could worsen the respiratory depression.
The patient's heart rate is 82 beats per minute, which is within the normal range.
The patient's blood pressure is 135/88 mm Hg, which is also within the normal range.
Choice C rationale:
Administering naloxone (Narcan) to counteract respiratory depression would not be appropriate at this time because the patient is not showing signs of severe respiratory depression. Naloxone is a medication that is used to reverse the effects of opioid overdose. It is typically only used in situations where the patient is experiencing life-threatening respiratory depression.
Choice D rationale:
Administering morphine sulfate IV 4 mg over 1-5 minutes would not be appropriate for the reasons listed above. It could worsen the patient's respiratory depression and potentially lead to other complications.
Choice B is the best answer because it is the most conservative and safest option. By withholding the next dose of morphine and informing the provider about the patient's symptoms, the nurse can ensure that the patient receives the appropriate care and that any potential complications are avoided.
Correct Answer is A
Explanation
Choice A rationale:
NPH insulin is an intermediate-acting insulin that typically peaks 6-12 hours after administration.
Given that the insulin was administered at 1700 (5:00 PM), the peak action would be expected to occur between 2100 (9:00 PM) and 0500 (5:00 AM).
This time frame aligns with the known pharmacokinetics of NPH insulin.
It's crucial for nurses to be aware of the peak action times of different insulin types to effectively manage blood glucose levels and adjust insulin doses accordingly.
Choice B rationale:
Incorrect. NPH insulin does have a peak action, as explained above.
It's important to understand that even intermediate-acting insulins have a period of peak activity when they exert their strongest glucose-lowering effect.
Choice C rationale:
Incorrect. This time frame is too early to represent the peak action of NPH insulin. The peak action typically occurs later, between 6-12 hours after administration.
Choice D rationale:
Incorrect. This time point is too specific to accurately represent the peak action of NPH insulin.
The peak action can vary within the 6-12 hour window, depending on individual factors and injection site.
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