Thyroid Hormones and Antithyroid Drugs
- Previous year questions on Thyroid Hormones and Antithyroid Drugs for NEET PG (National Eligibility cum Entrance Test - Postgraduate), from the Pharmacology section of the exam.
- Most questions here come from previous-year papers of Indian postgraduate medical entrance and licensing exams; where a paper and year are recorded the question carries them. The image-based questions are original vignettes written around an openly licensed figure, and were never asked in any exam.
- 3 live questions in Thyroid Hormones and Antithyroid Drugs.
- Pharmacology is worth about 20 of 300 questions on the exam. See every subject’s weightage.
- Question set last updated 19 Aug 2026.
Q1.A 47-year-old woman presents with complaints of nervousness and increased sensitivity to hot weather. She is diagnosed with hyperthyroidism and prescribed propylthiouracil. What is the principal mechanism by which this drug acts?
- ADecreasing the efficacy of TSH binding to the thyroid TSH receptor
- BDecreasing the rate of proteolysis of thyroglobulin
- CIncreasing the amount of 3,3',5'-triiodothyronine (reverse T3; rT3)
- DInhibiting deiodination of thyroxine (T4)✓ Correct answer
Q2.Carbimazole causes which of the following congenital anomaly?
- AAplasia cutis✓ Correct answer
- BVentricular septal defect
- CUrinary tract anomalies
- DAtrial septal defect
Q3.All of the following are potentially serious side effects of thioamide group of antithyroid drugs except:
- AHepatic dysfunction
- BSevere rash
- CAgranulocytosis
- DAnaphylaxis✓ Correct answer
Answer key
Q1: D. Inhibiting deiodination of thyroxine (T4); Q2: A. Aplasia cutis; Q3: D. Anaphylaxis.
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