Final answer:
For a Parkinson's patient showing symptoms of Neuroleptic Malignant Syndrome, the appropriate treatment involves Dantrolene, stopping dopamine agonists, supportive care, and careful monitoring.
Step-by-step explanation:
If a patient with Parkinson's disease is presenting with a high fever, rigidity, and unusual shifts in consciousness, this may indicate the development of Neuroleptic Malignant Syndrome (NMS), a life-threatening condition often triggered by the use of dopaminergic drugs. The typical treatment would include the immediate discontinuation of dopamine agonist medications, the administration of Dantrolene to reduce muscle rigidity and fever, supportive care to stabilize the patient, and close observation to monitor the patient's progress. Hence, the correct choice for this patient's treatment is C) Dantrolene, discontinuation of dopamine agonist, supportive care, and close observation.