The nurse is providing medication teaching to a client with bipolar disorder who receives a prescription for lithium carbonate. Which instruction should the nurse emphasize with the client?

A) Avoid taking the medication on an empty stomach:
While it’s generally recommended to take lithium carbonate with food or milk to minimize gastrointestinal side effects, taking it on an empty stomach does not pose a significant risk. Therefore, it is not the most crucial instruction to emphasize to the client.

B) Maintain a fluid intake of 1,500 to 3,000 mL per day:
This instruction is crucial because lithium can cause dehydration, especially if the client becomes dehydrated due to increased sweating or decreased fluid intake. Adequate fluid intake helps maintain stable lithium levels in the blood and reduces the risk of toxicity. Emphasizing the importance of maintaining hydration is essential for clients taking lithium.

C) Report fluctuations in weight to the healthcare provider:
Weight fluctuations can indicate changes in fluid balance or other metabolic effects of lithium. While it’s important for the client to report changes in weight, this instruction is not as critical as ensuring adequate fluid intake, which directly affects lithium levels and toxicity risk.

D) Keep medication fliers for frequent review and reference:
While it’s helpful for clients to have medication information for reference, this instruction is more about general medication adherence and education rather than a specific requirement related to lithium carbonate.

Answer: B. Administer a second dose of naloxone.

Rationale:

A) Prepare to assist with chest tube insertion:
Chest tube insertion is not relevant in this situation. A chest tube is typically used for conditions like pneumothorax or pleural effusion, not opioid-induced respiratory depression. The immediate concern here is the opioid overdose and the need for further naloxone administration to reverse the opioid effects, not the placement of a chest tube.

B) Administer a second dose of naloxone:
Administering a second dose of naloxone is the most appropriate action. Naloxone is a short-acting opioid antagonist, and its effects can wear off before the opioids have fully cleared from the client’s system. Given that the client’s respiratory rate is severely depressed and the oxygen saturation is dangerously low, another dose of naloxone is necessary to reverse the opioid's effects and restore adequate breathing. Immediate action is required to prevent further hypoxia.

C) Determine Glasgow Coma Scale score:
While assessing the client’s level of consciousness using the Glasgow Coma Scale (GCS) is important, it is not the immediate priority in this situation. The client’s low respiratory rate and oxygen saturation indicate a critical need for immediate treatment to improve ventilation and oxygenation. Administering naloxone should take precedence over neurological assessment.

D) Initiate cardiopulmonary resuscitation (CPR):
While the client’s respiratory depression is severe, initiating CPR may not yet be necessary if the client still has a pulse. Administering naloxone can potentially reverse the respiratory depression and prevent the need for CPR. If the client's condition continues to decline despite naloxone administration, CPR may become necessary later, but the first step is to administer a second dose of naloxone to restore breathing.