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
All of the following are potentially serious side effects of thioamide group of antithyroid drugs except: 
Select and explain. 
A. Hepatic dysfunction, B. Severe rash, C. Agranulocytosis, D. Anaphylaxis
D: Anaphylaxis
Answer: D: Anaphylaxis 
Explanation: Ans: D. Anaphylaxis(Ref. Goodman Gilman 12/e p1149; Katzung 13/e p671, 12/e p688)Adverse effects of anti-thyroid drugs:Most serious reaction: AgranulocytosisMC reaction: Mild, purpuric, uicarial papular rash.Less frequent complications: Pain & stiffness in joints, paresthesias, headache, skin pigmentation & loss of hair.ANCAs in -50% of patients receiving propylthiouracil.Cholestatic jaundice - More common with methimazole than propylthiouracil.Propylthiouracil-associated hepatic failure.