are there any drugs that could cure this disease?
The main antithyroid drugs are carbimazole (in the UK), methimazole (in the US), and propylthiouracil/PTU.
Graves' disease
The main antithyroid drugs are carbimazole (in the UK), methimazole (in the US), and propylthiouracil/PTU. 
where is thyroid gland situated in human body Neck what does this gland do? The primary function is the production of the iodine-containing thyroid hormones, triiodothyronine (T) and thyroxine (T) and the peptide hormone calcitonin. what are the common diseases associated with this gland? Graves' disease, Thyroid nodules,  goitre, cancer, etc. what books are available on the first disease? UNANSWERABLE
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Graves' disease [SEP] Antithyroid drugs
The main antithyroid drugs are carbimazole (in the UK), methimazole (in the US), and propylthiouracil/PTU. These drugs block the binding of iodine and coupling of iodotyrosines. The most dangerous side effect is agranulocytosis (1/250, more in PTU). Others include granulocytopenia (dose-dependent, which improves on cessation of the drug) and aplastic anemia. Patients on these medications should see a doctor if they develop sore throat or fever. The most common side effects are rash and peripheral neuritis. These drugs also cross the placenta and are secreted in breast milk. Lugol's iodine may be used to block hormone synthesis before surgery. A randomized control trial testing single-dose treatment for Graves' found methimazole achieved euthyroid state more effectively after 12 weeks than did propylthyouracil (77.1% on methimazole 15 mg vs 19.4% in the propylthiouracil 150 mg groups).