1. Neomerkazole (carbimazole) is an antithyroid medication used to treat hyperthyroidism (hyperthyroidism). 2. It works by blocking the production of thyroid hormone and restoring the gland to normal size and function. 3. Neomerkazol (Carbimazole) is available in tablet form and should be taken as directed by your doctor. . Side effects may include nausea, headache and abdominal pain. 5. Buy NEO-MERCAZOLE (CARBIMAZOLE) from our online pharmacy today and eliminate the symptoms of hyperthyroidism.