Carbitez-5 Tablet 100's is used in the treatment of hyperthyroidism (overactive thyroid gland). It contains Carbimazole, which works by decreasing the production of thyroid hormones by the thyroid gland. In some cases, this medicine may cause side effects such as headache, dizziness, nausea, skin rash, itching, joint pain, changes in taste or hair thinning. Inform the doctor if you are pregnant or breastfeeding, taking any other medication, or have any pre-existing medical conditions.