What is one potential consequence of a client increasing their lithium dosage on their own?

Increasing the lithium dosage on one’s own can lead to renal failure as a potential consequence. Lithium is a medication that requires careful monitoring due to its narrow therapeutic range. When a client self-adjusts their dosage, it can lead to lithium toxicity, which adversely affects kidney function. The kidneys play a crucial role in excreting lithium; thus, elevated levels due to inappropriate dosing can overwhelm renal mechanisms, leading to acute kidney injury or even chronic renal failure over time.

The other options do not accurately reflect the likely outcome of self-increasing the dosage. Improved mood stability, for instance, may occur if the dosage was previously ineffective, but self-medication poses significant risks, including the potential for toxicity rather than guaranteed benefits. Increased sodium retention and enhanced therapeutic effects are also not likely outcomes of unsupervised dosage alterations; in fact, such actions could disrupt the delicate balance needed for the effective management of mood disorders treated with lithium.