Forty-eight hours after starting haloperidol, the client is observed standing by the nurse’s station with his neck arched sharply backward. The nurse recognizes that the client:

Choice A Reason: Pseudo-Parkinsonian side effects, also known as drug-induced parkinsonism, can occur with the use of antipsychotic medications like haloperidol. These side effects include symptoms such as rigidity, bradykinesia, tremor, and postural instability. However, the description of the client’s neck arched sharply backward is more indicative of an acute dystonic reaction rather than pseudo-Parkinsonian side effects. Pseudo-Parkinsonian symptoms typically develop more gradually and do not present with such dramatic posturing. Choice B Reason: While some side effects of haloperidol can be temporary and may disappear after several days, the acute dystonic reaction described in the scenario requires immediate intervention. Acute dystonic reactions are characterized by sudden, severe muscle contractions that can be painful and potentially dangerous if they involve the airway. Therefore, it is crucial to address this reaction promptly rather than waiting for it to resolve on its own. Choice C Reason: Increasing the dosage of haloperidol in response to the described symptoms would likely exacerbate the situation. The client’s symptoms are not indicative of worsening psychotic behavior but rather an adverse reaction to the medication. Increasing the dosage could lead to more severe side effects and complications. The appropriate response is to treat the acute dystonic reaction and reassess the medication regimen. Choice D Reason: An acute dystonic reaction is a known side effect of antipsychotic medications like haloperidol. It involves sudden, severe muscle contractions, often affecting the neck, face, and back. This reaction can be distressing and requires immediate treatment with anticholinergic medications such as benztropine or diphenhydramine. Prompt intervention can relieve the symptoms and prevent further complications.