Levothyroxine is named as a drug or biological intervention in 2 clinical trials in our USA and China trial registers, 2 of which are recruiting. Lead sponsors include AbbVie (1) and Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University (1). Registered phases: Phase 2/3 and Not applicable. Conditions studied include Hypothyroidism; Recurrent Pregnancy Loss; Euthyroid With Thyroid Antibodies.
| NCT ID | Study | Phase | Status |
|---|---|---|---|
| NCT06345339 | A Study to Assess the Safety and Efficacy of Oral Armour Thyroid Compared to Synthetic T4 for the Treatment of Primary Hypothyroidism in Adult Participants (ClinicalTrials.gov ↗) Hypothyroidism |
Phase 2/3 | Recruiting |
| NCT06652113 | Effect of HCQ Combined With LT4 on LBR in Euthyroid Women With URPL and TPO-Ab (ClinicalTrials.gov ↗) Recurrent Pregnancy Loss, Euthyroid With Thyroid Antibodies |
Not applicable | Recruiting |
Registers list studies that are recruiting, about to open, active but closed to enrolment, or enrolling by invitation. The UK and USA registers cover industry-sponsored studies only. Trial titles and statuses are copied from the registry as published.
| Condition (as registered) | Trials |
|---|---|
| Hypothyroidism | 1 |
| Recurrent Pregnancy Loss | 1 |
| Euthyroid With Thyroid Antibodies | 1 |
| Lead sponsor | Trials |
|---|---|
| AbbVie | 1 |
| Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University | 1 |
| Register | Levothyroxine trials |
|---|---|
| Clinical trials in USA | 1 |
| Clinical trials in China | 1 |
A trial with sites in more than one country appears in each of those registers.
Everything on this page is copied from public ClinicalTrials.gov registry records — it is not written from memory, and nothing here describes how Levothyroxine works or whether it is effective. Each trial links to its own record so you can check it yourself.
This page is built automatically: a daily sync job reads the registry records behind our country trial registers, collects every trial that lists Levothyroxine (or a registered synonym) as a drug or biological intervention, and tabulates the registry fields directly. Placebos and generic comparators are excluded. There is no AI drafting and no per-compound editorial pass, and the page has not been clinically reviewed. The “last verified” date above is the timestamp of that sync, not a review date. Our general editorial approach is described in our editorial standards and corrections policy. The ClinicalTrials.gov data on this page was last retrieved on 24 Sep 2026.