Hyperthyroidism is a common thyroid disorder that occurs when the thyroid gland produces excessive amounts of thyroxine (T4) and triiodothyronine (T3) hormones. To manage this condition, doctors often prescribe antithyroid medications such as Methimazole (MMI) or Propylthiouracil (PTU). However, many people worry about the side effects of these medications. So, does taking hyperthyroidism medication cause side effects? Let’s explore this in detail.