Ritonavir is named as an intervention in 2 current clinical trials in our USA, UK and China registers. 2 are recruiting patients now. The most common phase is Phase 3. The sponsor with the most trials is Pfizer (1). The most-studied condition is COVID-19.
| Study | Phase | Status | Lead sponsor | Registers |
|---|---|---|---|---|
|
EPIC-Peds: A Study to Learn About the Study Medicine Called PF-07321332 (Nirmatrelvir)/Ritonavir in Patients Under 18 Years of Age With COVID-19 That Are Not Hospitalized But Are at Risk for Severe Disease
NCT05261139 · ClinicalTrials.gov ↗ · COVID-19
|
Phase 3 | Recruiting | Pfizer | UK, USA |
|
A Phase 1/2a Study of DB-1303/BNT323 in Advanced/Metastatic Solid Tumors
NCT05150691 · ClinicalTrials.gov ↗ · HER2-positive Advanced Solid Tumor
|
Phase 1/2 | Recruiting | DualityBio Inc. | USA, China |
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.
The same active substance in our other registers, matched by its exact name. Each entry links to the register record it comes from.
3 single-substance products containing Ritonavir on the HPRA medicines list.
| Lead sponsor | Trials |
|---|---|
| Pfizer | 1 |
| DualityBio Inc. | 1 |
| Register | Trials | Recruiting |
|---|---|---|
| Clinical trials in USA | 2 | 2 |
| Clinical trials in UK | 1 | 1 |
| Clinical trials in China | 1 | 1 |
A trial with sites in more than one country appears in each of those registers.
2 current trials in our USA, UK and China registers name Ritonavir as a drug or biological intervention, as of the registry sync on 25 September 2026. Completed and withdrawn studies are not counted.
Yes. 2 of the 2 trials are recruiting: 2 with sites in USA, 1 with sites in UK and 1 with sites in China. Eligibility and site contacts are on each trial's record. Only the study team can confirm whether a patient is eligible.
Pfizer (1) and DualityBio Inc (1). The number in brackets is how many trials each organisation leads.
Yes. The HPRA medicines list includes 3 single-substance products containing Ritonavir, for example Norvir 100 mg film-coated tablets (AbbVie Deutschland GmbH & Co. KG). A licence does not mean a product is currently marketed or reimbursed; see each product's record.
The registers we track list 6 entries for Ritonavir: US FDA: resolved; US FDA: resolved; US FDA: resolved; US FDA: resolved; 2 German notices. 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 Ritonavir 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 Ritonavir 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 Ritonavir (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 25 Sep 2026.