Antithyroid drugs, which have been in use for more than half a century, remain cornerstones in the management of hyperthyroidism. [1] Most patients tolerate treatment well but some may develop life-threatening side effects such as agranulocytosis, aplastic anemia, vasculitis and cholestatic hepatitis. The most common adverse effect is a maculo-papular pruritic rash, at times accompanied by fever. [2] Adverse reaction of these thioamides occurs in 3-12% of treated patients. Agranulocytosis and cholestatic hepatitis together is an extremely rare idiosyncratic side effect of Carbimazole treatment and are usually dose and age-related.
Here we share our experience of managing such a case of Carbimazole-induced acute cholestatic hepatitis along with agranulocytosis.