The primary health care provider prescribes determination of the serum lithium level tomorrow for a client with bipolar disorder, manic phase, who has been receiving lithium 300 mg PO three times...

The primary health care provider prescribes determination of the serum lithium level tomorrow for a client with bipolar disorder, manic phase, who has been receiving lithium 300 mg PO three times daily for the past 5 days. At which of the following times should the nurse plan to have the blood specimen obtained?

1. Before bedtime.

2. After lunch.

3. Before breakfast.

4. During the afternoon.