For patients undergoing treatment for Graves' disease, monitor thyroid function tests (TFTs) every 6 weeks until the TSH is within the reference range, then every 3 months until antithyroid drugs are stopped NICE CKS.
After stopping antithyroid drugs, measure TSH (with cascading) within 8 weeks, then every 3 months for a year, and annually thereafter NICE CKS.
During radioactive iodine treatment follow-up, measure TSH, FT4, and FT3 levels every 6 weeks for the first 6 months until TSH is within the reference range NICE CKS.
If hyperthyroidism persists after radioactive iodine treatment, consider antithyroid drugs until the 6-month appointment, with ongoing monitoring NICE CKS.
Post-thyroid surgery, if total thyroidectomy was performed, start levothyroxine and monitor TSH and FT4 at 2 and 6 months, then annually. For hemithyroidectomy, TSH may be measured annually NICE CKS.