A Study to Assess the Efficacy, Safety, and Tolerability of IMVT-1402 as Treatment for Adult Participants With Graves' Disease

To join this study, you need to be an adult, at least 18 years old. You must have Graves' disease and your thyroid must still be overactive, even though you are already taking medication for it. You also need to be able to understand what the study involves and agree to take part by signing a consent form.

There are also some reasons why you might not be able to join. For example, if you've already had your thyroid treated with radioactive iodine or had surgery to remove it, this study isn't for you. Also, if you have other serious autoimmune conditions that need treatment, or a severe form of thyroid eye disease that needs immediate surgery, you wouldn't be able to participate. The study is designed to make sure it's safe for everyone involved.

If you decide to take part, you'll be given either the new medicine, IMVT-1402, or a dummy medicine called a placebo. You won't know which one you're getting, and neither will your study doctor, until the very end of the study. You will have regular visits to the clinic where the study team will monitor your health, check your thyroid hormone levels with blood tests, and ask about any side effects you might be experiencing. They will also review your usual thyroid medication dose. The total duration of your participation in the study will involve regular check-ups over several months to carefully track your progress and any changes in your health.