Final answer:
Neuroleptic malignant syndrome (NMS) is a severe and potentially life-threatening reaction that can occur with the use of antipsychotic medications. Symptoms include elevated blood pressure, hyperthermia, muscle rigidity, and changes in mental status. Immediate medical intervention is necessary.
Step-by-step explanation:
The symptoms described in the scenario are indicative of a potential condition called neuroleptic malignant syndrome (NMS), which is a severe and potentially life-threatening reaction that can occur with the use of antipsychotic medications. NMS is characterized by a combination of symptoms including elevated blood pressure, hyperthermia (fever), muscle rigidity, and changes in mental status. If a client presents with these symptoms, the nurse should initiate immediate medical intervention, including discontinuing the antipsychotic medication, providing supportive care, and consulting with the healthcare provider for further management.