This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Thyroid, Subject name: Pharmacology
[{'content': 'Female on carbimazole therapy presents with sudden fever, rigors and sore throat. Which is the investigation of choice for this patient? \nSelect and explain. \nA. Check blood counts, B. Check C reactive protein, C. Take throat Swab, D. Treat for malaria', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Check blood counts o The most common side effect of carbimazole is maculopapular pruritic rash, while most serious adverse effect is agranulocytosis which is reversible.o Patient in the given question presents writh sudden onset fever, rigors and sore throat. Infection of any site which is sudden onset and rapidly progressive in a patient on carbimazole therapy the suspicion should be development of agranulocytosis, so it is essential to do blood counts.", 'role': 'assistant'}]