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Supplement × Prescription·Evidence index

Methimazole and Selenium: what the research found

PubMed indexes 8 records that name Methimazole and Selenium together, either in the title or in an interaction, co-administration, or pharmacokinetic context. The key findings come first, in the authors’ own words, followed by every study with its design and PubMed link.

A summary of published research, not medical advice. A pharmacist can check any combination against your full list of medicines and supplements.

Key findings

What the studies concluded.

Reviews and human studies first. Each quote is the authors’ own conclusion about their study, not a NutriStack assessment, and a single study is not a consensus.

“We suggest that the combined use of MMI and Se could improve the thyroid activity in patients, which may provide an effective therapy for the treatment of GD in clinical settings.”

Xu et al. · 2019 · Human study · details

“Our study, carried out in a selenium-sufficient cohort of GD patients, failed to show an adjuvant role of selenium in the short-term control of hyperthyroidism. However, selenium might be beneficial in patients from selenium-deficient areas, as well as in the long-term outcome of antithyroid treatment.”

Leo et al. · 2017 · Human study · details

“Methimazole combined with selenium can effectively treat Graves' disease in children, reduce the expression of TRAb, TPOAb, FT4 and inflammatory factors, and improve the curative effect. Thus, the combined treatment warrants further clinical research.”

The research

8 studies naming Methimazole and Selenium.

Strongest relevance first: papers naming both substances in the title, then human trials and systematic reviews.

A pilot study on the beneficial effects of additional selenium supplementation to methimazole for treating patients with Graves’ disease.

Turkish journal of medical sciences · 2019 · PMID 31023005

Randomized Controlled Trial

“We suggest that the combined use of MMI and Se could improve the thyroid activity in patients, which may provide an effective therapy for the treatment of GD in clinical settings.”

Xu et al. · Authors' conclusion

Names both Methimazole and Selenium in its title.

Effects of selenium on short-term control of hyperthyroidism due to Graves' disease treated with methimazole: results of a randomized clinical trial.

Journal of endocrinological investigation · 2017 · PMID 27734319

Randomized Controlled Trial

“Our study, carried out in a selenium-sufficient cohort of GD patients, failed to show an adjuvant role of selenium in the short-term control of hyperthyroidism. However, selenium might be beneficial in patients from selenium-deficient areas, as well as in the long-term outcome of antithyroid treatment.”

Leo et al. · Authors' conclusion

Names both Methimazole and Selenium in its title.

Clinical effect of methimazole combined with selenium in the treatment of toxic diffuse goiter in children.

World journal of clinical cases · 2022 · PMID 35211552

103 participants

“Methimazole combined with selenium can effectively treat Graves' disease in children, reduce the expression of TRAb, TPOAb, FT4 and inflammatory factors, and improve the curative effect. Thus, the combined treatment warrants further clinical research.”

Zhang et al. · Authors' conclusion

Names both Methimazole and Selenium in its title.

Limitations

What this evidence cannot tell you.

Search-based evidence indexes have real limits, and it is worth being explicit about them:

How to read this page

A literature summary, not guidance.

NutriStack

Track what you actually take.

NutriStack is a free iPhone app for organising a supplement routine: what you take, when, and what the published record says about it. Its exploratory interaction checker covers Methimazole, Selenium, and several hundred other substances.

Log your routine, get reminders at the times you choose, and scan a label to add a product. The checker is a research and organisation tool, not a clinical decision aid.

NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.