Relief of symptoms depends on the extent of the hyperthyroidism present at the start of methimazole. Patients with severe hyperthyroidism may take months to experience significant symptomatic relief. Patients with milder hyperthyroidism start to feel better in a few weeks. But regular compliance and taking methimazole daily as suggested, is important for achieving good control of hyperthyroidism. For rapid symptom relief, you can use propranolol. But this should be taken under medical supervision. Abnormal sleep pattern is part of disease. When serum T4 level will return to normal, your sleep pattern returns to normal which will take time. Advice 1. Continue methimazole as prescribed 2. Consult your doctor for possible use of propranolol for rapid relief of symptoms 3. Investigation – serum TSH & T4 I hope this information will help you. I will be happy if you ask another question Thank