Kindly provide the History and investigation reports also... it very important If the patient is pregnant the line of management is different initially PTU for first triimester and 2nd and 3rd trimester methimzole can be given. But close monitoring of Thyroid hormones and Cbp and Lft Is to done; As the sideeefect are highly In non pregnant Usually Carbamizole group of drugs are given... but you have to have a check on your Hemogram and Liver parameters as when doctor advises.. If you have multinodular goitre or Toxic nodular goitre or solitary nodule or Graves hyperthyroidism then Thyroid hormones are first normalised with medication and later if you require RAI treatment or surgery will be decided by your doctor.