This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Most common side effect of prilocaine is: \nSelect and explain. \nA. Methemoglobinemia, B. Respiratory arrest, C. Skin allergy, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Prilocaine\nIt\xa0is\xa0similar\xa0to\xa0lidocaine\xa0but\xa0does not cause vasodilatation\xa0at\xa0the\xa0site\xa0of infiltration\xa0and\xa0has\xa0lower\xa0CNS\xa0toxicity\xa0due to larger\xa0volume\xa0of\xa0distribution\xa0and\xa0faster clearance.\xa0One\xa0of\xa0its\xa0metabolites\xa0has the\xa0potential\xa0to cause methemoglobinaemia. Prilocaine has been used for infiltration, nerve\xa0block,\xa0spinal\xa0and\xa0intravenous\xa0regional\xa0anaesthesia.\xa0\nReference: Essentials of Medical Pharmacology Eighth Edition KD\xa0 TRIPATHI\xa0 page no 392', 'role': 'assistant'}]