A client prescribed lithium carbonate 300 mg twice daily 3 months ago comes to the Emergency Department with nausea, diarrhea, muscle weakness, and coarse tremors. They notified the provider that they have had flu like symptoms and have not been able to eat or drink. The nurse suspects the client is exhibiting signs of:
A.
toxicity from the lithium carbonate.
B.
developing a tolerance to the lithium carbonate.
C.
stopping their prescribed lithium carbonate.
D.
consuming foods high in tyramine while taking lithium carbonate.
The correct answer and Explanation is :
The correct answer is:
A. toxicity from the lithium carbonate.
Explanation:
Lithium carbonate is a medication commonly used to treat bipolar disorder and other mood disorders. It has a narrow therapeutic range, meaning that the difference between a therapeutic dose and a toxic dose is small. For this reason, patients on lithium require careful monitoring of their blood levels.
The symptoms described for the client—nausea, diarrhea, muscle weakness, and coarse tremors—are indicative of lithium toxicity. These symptoms arise when lithium levels in the blood exceed the therapeutic range. Several factors can contribute to toxicity, including dehydration, renal impairment, or interactions with other medications.
The client’s history of flu-like symptoms and difficulty eating or drinking suggests dehydration or reduced fluid intake, which can lead to elevated lithium levels. Dehydration decreases the body’s ability to excrete lithium effectively, causing its levels to rise. This is compounded by the client’s gastrointestinal symptoms (nausea and diarrhea), which can further exacerbate dehydration and disrupt lithium levels.
Tolerance (Option B) is not a typical concern with lithium, as it is not a medication where tolerance commonly develops. Stopping the prescribed lithium (Option C) could lead to a relapse of symptoms or destabilization of the mood disorder, but it wouldn’t directly cause the described symptoms of toxicity. Consuming foods high in tyramine (Option D) is not relevant to lithium therapy; tyramine is more associated with interactions with monoamine oxidase inhibitors (MAOIs), which are not related to lithium carbonate.
In summary, the client’s symptoms are characteristic of lithium toxicity, and addressing this issue involves urgent medical intervention, including assessing and possibly adjusting lithium levels and ensuring proper hydration.