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The appropriate dosage of Methimazole after Radioactive iodine treatment

The most appropriate dosage of MMI after Radioactive iodine treatment to maintain normal freeT4 and freeT3: a randomised pilot study

Status
Unknown
Phases
Phase 2
Study type
Interventional
Source
TCTR
Registry ID
TCTR20230426008
Enrollment
30
Registered
2023-04-26
Start date
2021-11-01
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Graves&#039

Interventions

The first group (full dose) received MMI at the same dose as before RAI,The second group (half dose) received MMI at half-dose before RAI. ,The last group (no dose) did not receive MMI after RAI.
Experimental Drug,Experimental Drug,Experimental No treatment
Full dose,Half dose,No dose

Sponsors

Siriraj Research Development Fund (managed by Routine to Research), Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 80 Years

Inclusion criteria

Inclusion criteria: 1. Patients with Graves' disease were diagnosed by endocrinologists as having hyperthyroidism, diffused goiter without nodules, or serum thyroid autoantibodies that were positive. 2. Patients were followed up in the outpatient internal medicine clinic at Siriraj Hospital. 3. They had to be 18 or older. 4. Their free T3 and free T4 levels before RAI therapy had to be no higher than 2UNL. 5. They all had signs and symptoms that indicated RAI therapy.

Exclusion criteria

Exclusion criteria: 1. The patient who had Graves disease with a thyroid nodule. 2. Allergies to anti-thyroid medications. 3. Prior thyroid surgery. 4. Prior RAI therapy. 5. Psychiatric problems: Bipolar, Major depressive disorder, schizophrenia 6. Graves ophthalmopathy

Design outcomes

Primary

MeasureTime frame
The most appropriate MMI dosage to maintain euthyroid status after receiving RAI. 24 week after RAI therapy Median free T3 and free T4, duration of normal free T3 and free T4 levels (euthyroid status) in 3 patients groups

Secondary

MeasureTime frame
Quality of life in Graves disease patients before and after receiving RAI therapy. Before and 24 weeks after AI therapy ThyPROth questionnaire

Countries

Thailand

Contacts

Public ContactTada Kunavisarut

Faculty of Medicine Siriraj Hospital, Mahidol University

kunavisarut@gmail.com024197799

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026