Post-medication evaluation of a patient receiving haloperidol should check for which adverse effect?

Haloperidol is an antipsychotic medication primarily used to manage symptoms of schizophrenia and acute psychosis. One of the more serious adverse effects associated with haloperidol, particularly at higher doses or with prolonged use, is extrapyramidal symptoms (EPS). Muscle rigidity is a hallmark sign of EPS, which can manifest as stiffness in the muscles, making movement difficult and uncomfortable for the patient.

Recognizing and monitoring for muscle rigidity during the post-medication evaluation is essential, as these symptoms can significantly impact the patient's quality of life and adherence to treatment. Additionally, if muscle rigidity is identified, it may warrant intervention, such as the adjustment of medication or the addition of anti-parkinsonian agents to mitigate these effects. This focus on muscle rigidity also highlights the importance of monitoring for neurologic side effects when administering antipsychotic medications.