A client who has Graves' disease is prescribed methimazole. Which of the following effects should the nurse expect to see after the client has taken the medication for 2 months?

The correct answer is D: Increased sleeping. Methimazole is an antithyroid medication used to treat hyperthyroidism in conditions like Graves' disease. It works by reducing the production of thyroid hormones. After 2 months of treatment, the client's thyroid hormone levels would have likely normalized, leading to decreased metabolism and energy levels, resulting in increased sleeping. Choices A, B, and C are incorrect as methimazole would actually lead to a decrease in pulse rate, cooler skin, and weight gain due to the reduction in thyroid hormone levels.