A nurse is assessing a client who has a prescription for haloperidol 0.5 mg PO three times daily.The medication administration record shows that the client received 5 mg per dose on the previous day.Which of the following manifestations is the nurse’s priority to assess?

Choice A rationaleHaloperidol can cause constipation as a side effect due to its anticholinergic properties. However, this is not the priority concern compared to more severe symptoms such as muscle stiffness.Choice B rationaleDry mouth is another anticholinergic effect of haloperidol, caused by decreased saliva production. While uncomfortable, it is not as critical as muscle stiffness, which may indicate more serious issues.Choice C rationaleDaytime drowsiness can occur with haloperidol use due to its sedative effects on the central nervous system. Although it affects daily functioning, muscle stiffness presents a more immediate danger.Choice D rationaleMuscle stiffness could indicate extrapyramidal symptoms or neuroleptic malignant syndrome, both serious complications of haloperidol. These conditions require immediate medical intervention to prevent further harm.