A client with schizophrenia is placed on chlorpromazine 50 mg PO bid, and Benztropine 2...

Chlorpromazine is an antipsychotic medication that can cause extrapyramidal symptoms (EPS), such as muscle spasms and tremors. Benztropine is an anticholinergic medication often prescribed to manage these side effects.

If a client on chlorpromazine develops muscle spasms and tremors, it indicates EPS, and administering Benztropine would help alleviate these symptoms. The other options, such as severe agitation, sore throat, or suicidal thoughts, are not directly related to the need for Benztropine.