The nurse is preparing medications for a client with bipolar disorder and notices that the antipsychotic medication was discontinued several days ago. Which medication should also be discontinued?

Rationale: A. Lithium: Lithium is a mood stabilizer used in bipolar disorder to control manic and depressive episodes. It is not dependent on concurrent antipsychotic use, so it should be continued as prescribed to maintain mood stability. B. Magnesium: Magnesium is a mineral supplement that may be given for electrolyte balance or constipation management. It does not have a therapeutic connection to antipsychotics and therefore does not need to be stopped when an antipsychotic is discontinued. C. Alprazolam: Alprazolam is a benzodiazepine that can be prescribed for anxiety or insomnia. Its use is not dependent on whether an antipsychotic is prescribed, so it does not require discontinuation in this situation. D. Benztropine: Benztropine is prescribed to manage extrapyramidal symptoms caused by antipsychotic medications. If the antipsychotic has been discontinued, benztropine is no longer necessary and should also be discontinued to avoid unnecessary side effects.