A nurse is assessing a client who has schizophrenia and has been on long-term treatment with chlorpromazine. He notes the client is experiencing some involuntary movements of the tongue and face. The nurse should suspect the client has developed which of the following adverse effects?

The correct answer is B: Tardive dyskinesia. Tardive dyskinesia is a common adverse effect of long-term antipsychotic medication use, such as chlorpromazine. It is characterized by involuntary movements of the tongue and face. This condition is often irreversible and can be distressing for the client. Akathisia (choice A) is a different extrapyramidal side effect characterized by restlessness and the urge to move constantly. Dystonia (choice C) is another extrapyramidal side effect that presents as sustained muscle contractions causing abnormal postures. In this case, the symptoms described in the question are more indicative of tardive dyskinesia due to the specific type of involuntary movements observed in the client.