Which statement by a client indicates an understanding of medication instructions for lithium carbonate?

The statement indicating an understanding of medication instructions for lithium carbonate is that it should be taken with meals. Taking lithium with food can help minimize gastrointestinal side effects, such as nausea, which is a common side effect when starting the medication. This practice not only aids in the absorption of the medication but also promotes adherence to the treatment regimen, as individuals are less likely to skip doses when they associate taking the medication with a regular activity such as eating.

In contrast, skipping doses can lead to fluctuations in blood levels of lithium, which may increase the risk of side effects or reduce the medication's effectiveness. Monitoring blood levels is crucial because maintaining therapeutic levels is key to ensuring efficacy and safety. Additionally, it's important to maintain appropriate sodium intake, as lithium works closely with sodium levels in the body, and a low sodium diet can increase the risk of lithium toxicity.