A patient taking risperidone is experiencing restlessness. What is the likely cause?

The correct answer points to risperidone as the likely cause of the patient's restlessness. Risperidone is an atypical antipsychotic known to have side effects that include extrapyramidal symptoms such as akathisia, a condition characterized by inner restlessness and an uncontrollable urge to be in constant motion. This side effect can occur due to the drug's influence on neurotransmitter systems, particularly dopamine and serotonin.

Patients on risperidone should be monitored for these types of side effects, as they can significantly affect their quality of life. Addressing this restlessness may require adjustments in therapy, such as switching medications or adding treatments to mitigate the akathisia.

Understanding the relationship between antipsychotic medications like risperidone and side effects helps in better management of patient care in psychiatric practice.