Arsenic Trioxide is named as an intervention in 7 current clinical trials in our China, Ireland and USA registers. 4 are recruiting patients now. The most common phase is Phase 2. The sponsor with the most trials is Yang Li (2). The most-studied condition is Acute Promyelocytic Leukemia (APL). The EU clinical trials register (CTIS) separately lists 1 authorised or ongoing trial.
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.
Authorised or ongoing trials in the EU Clinical Trials Information System that list a product containing Arsenic Trioxide. Many trials are registered in both CTIS and ClinicalTrials.gov, so these are shown separately rather than added to the count above. Trials with a site in Ireland are listed first.
| Study | Phase | Status | Sponsor | Countries |
|---|---|---|---|---|
|
A Pivotal Open-label Phase 3 Clinical Study Evaluating the Efficacy and Safety of QTX-2101 in Combination With All-trans Retinoic Acid in Newly Diagnosed, Low-risk Acute Promyelocytic Leukemia
2025-524810-28-00 · CTIS ↗ · Neoplasms
|
Phase 3 | Ongoing | Quetzal Therapeutics LLC | Germany, Poland, Spain + 3 more |
The same active substance in our other registers, matched by its exact name. Each entry links to the register record it comes from.
4 single-substance products containing Arsenic Trioxide on the HPRA medicines list.
| Lead sponsor | Trials |
|---|---|
| Yang Li | 2 |
| Associazione Italiana Ematologia Oncologia Pediatrica | 1 |
| Quetzal Therapeutics | 1 |
| Anhui Medical University | 1 |
| Institute of Hematology & Blood Diseases Hospital, China | 1 |
| Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University | 1 |
| Register | Trials | Recruiting |
|---|---|---|
| Clinical trials in China | 5 | 2 |
| Clinical trials in Ireland | 1 | 1 |
| Clinical trials in USA | 1 | 1 |
| EU register (CTIS) | 1 | — |
A trial with sites in more than one country appears in each of those registers. CTIS does not publish a recruiting flag; its trials may also appear in the registers above.
7 current trials in our China, Ireland and USA registers name Arsenic Trioxide as a drug or biological intervention, as of the registry sync on 26 September 2026. Completed and withdrawn studies are not counted.
Yes. 4 of the 7 trials are recruiting: 2 with sites in China, 1 with sites in Ireland and 1 with sites in USA. Eligibility and site contacts are on each trial's record. Only the study team can confirm whether a patient is eligible.
Yang Li (2), Associazione Italiana Ematologia Oncologia Pediatrica (1), Quetzal Therapeutics (1) and Anhui Medical University (1), among 6 lead sponsors in total. The number in brackets is how many trials each organisation leads.
Yes. 1 trial in our Ireland register (ClinicalTrials.gov). Some may be the same study registered in both. See the Irish clinical trials register for sites and contacts.
Yes. The HPRA medicines list includes 4 single-substance products containing Arsenic Trioxide, for example Arsenic trioxide Accord 1 mg/ml concentrate for solution for infusion (Accord Healthcare S.L.U.). A licence does not mean a product is currently marketed or reimbursed; see each product's record.
The registers we track list 2 entries for Arsenic Trioxide: Trisenox (EU: shortage resolved); US FDA: resolved. Shortages are product- and country-specific; check with a pharmacist.
Every trial, status, phase and sponsor on this page is copied from public ClinicalTrials.gov records by a daily sync. Nothing here describes how Arsenic Trioxide works or whether it is effective, and it is not medical advice.
Everything on this page is copied from public ClinicalTrials.gov registry records — it is not written from memory, and nothing here describes how Arsenic Trioxide 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 Arsenic Trioxide (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 26 Sep 2026.