Which client statement indicates a need for further teaching about lithium therapy?

The statement indicating a need for further teaching about lithium therapy is the one that suggests it's acceptable to double the next dose of lithium if a dose is missed. This reflects a misunderstanding of the importance of adhering to a prescribed medication regimen.

In lithium therapy, it's crucial to maintain stable blood levels of the medication for it to be effective and safe. Missing a dose can disrupt these levels, and simply compensating by taking extra lithium could lead to toxicity, which can have serious consequences due to lithium's narrow therapeutic range.

The recommended approach if a dose is missed is typically to take it as soon as remembered, unless it’s almost time for the next scheduled dose. In such cases, the missed dose should be omitted, and the patient should continue with their regular dosing schedule without doubling up.

Other statements indicate a proper understanding of lithium therapy. Ensuring a consistent salt intake helps maintain lithium levels, adequate hydration protects against dehydration which can affect lithium concentration, and taking the medication at the same time each day supports adherence and stable blood levels.