Displaying 2 results of Carbimazole Impurities Carbimazole is an anti-thyroid medication used to treat hyperthyroidism. However, during the manufacturing process of carbimazole, impurities may be produced, which can affect the safety and efficacy of the medication. These impurities can include carbimazole oxide, carbimazole sulfoxide, and carbimazole sulfone. It is important to monitor the levels of these impurities in carbimazole products to ensure their safety and quality for patients.