A nurse is teaching a class about administering IV fluids to treat dehydration. The nurse should include in the teaching that which of the following laboratory values indicates effective treatment of dehydration?

A. Acetaminophen: This is a common pain reliever and fever reducer. Acetaminophen is often used alongside other medications, including opioids like morphine, to manage pain more effectively. It's typically safe to use with morphine and is not an immediate concern for clarification.

B. Insulin glargine: Insulin glargine is a long-acting insulin used to control blood sugar levels in individuals with diabetes. While it's important to monitor blood sugar levels in patients receiving opioids, especially if they have diabetes, insulin glargine itself doesn't directly interact with morphine or the PCA pump.

C. Ondansetron: Ondansetron is an anti-nausea medication commonly used to prevent nausea and vomiting, particularly associated with chemotherapy or surgery. Patients receiving morphine, especially those with cancer, may also be prone to nausea. Ondansetron helps manage this side effect and does not typically interact adversely with morphine.

D. Naloxone: Naloxone is an opioid antagonist used to rapidly reverse the effects of opioid overdose, including respiratory depression, caused by drugs like morphine. It's administered in emergency situations to counteract the potentially life-threatening effects of opioids. While naloxone is critical for opioid safety, its presence on the medication list requires clear understanding and specific instructions regarding its use, dosage, and administration protocols in case of opioid-related emergencies.

A. Absence of deep-tendon reflexes:
Absence of deep-tendon reflexes is a sign of magnesium toxicity. Magnesium sulfate, when infused in high doses, can lead to neuromuscular blockade and affect reflexes. Discontinuing the infusion and administering calcium gluconate can counteract the effects of magnesium.

B. Urine output 80 mL in 4 hours:
Urine output is not a direct indicator of magnesium toxicity. Monitoring urine output is important for assessing renal function, but it is not a specific sign of magnesium toxicity.

C. Decreased level of consciousness:
Decreased level of consciousness is another sign of magnesium toxicity. Central nervous system depression is a potential adverse effect of elevated magnesium levels. Administering calcium gluconate can help antagonize the effects of magnesium.

D. Report of chills:
Chills are not typically associated with magnesium toxicity. This symptom may indicate other issues, such as infection or discomfort.
E. Systolic blood pressure 130 mm/Hg:
Systolic blood pressure within a normal range is not a sign of magnesium toxicity. Blood pressure changes are not typically the primary indicators of magnesium toxicity.