Which of the following is a side effect of lithium?

Polydipsia, or excessive thirst, is indeed a recognized side effect of lithium treatment. Lithium, primarily used to manage bipolar disorder, affects fluid balance and renal function in the body. It can lead to increased urine output, making individuals feel dehydrated, which in turn prompts them to drink more fluids.

This side effect can be particularly concerning because it may lead to other complications, such as electrolyte imbalances. Monitoring hydration levels and overall kidney function is essential for patients on lithium therapy. Understanding this side effect is crucial for both patients and healthcare providers to ensure the safe and effective use of lithium, including recognizing when further medical attention may be necessary due to potential complications.