A nurse is teaching a client who has bipolar disorder about lithium. Which of the following statements should the nurse include in the teaching?

Weight gain should be reported to your provider as an indication of lithium toxicity.

This medication is addictive, so you will need to discontinue it in six months.

Your provider may prescribe a diuretic if you have trouble urinating while taking lithium.

We will monitor your lithium levels closely while you are taking this medication.