A nurse in an acute care mental health facility is preparing to administer morning medication for a client who has been taking lithium for 2 weeks and has a current lithium level of 1.0 mEq/L. Which of the following actions should the nurse take?

Administer the morning dose of lithium.

Check the client's medication record to assess whether the client has been refusing her lithium.

Prepare for gastric lavage due to an extremely elevated lithium level.

Hold the medication and assess for early manifestations of toxicity.