Drug

Ritonavir clinical trials

Also written Norvir and RTV.

studies test it: 295
open now: 4
in phase 3: 54
first study started: 1998

Counted the way a researcher would: Ritonavir with its salts, dosage forms, brands and biosimilars. Looking for a trial to join? Including related medicines shows more you could take part in.

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How each study uses Ritonavir is sorted by a rule, right about nine times in ten. Readers can ask us to read every study one by one.Ask us to read each study

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Approvals

The first approval found in each region, with its record

United States: 1 Mar 1996 · NORVIR · NDA 020659 (FDA, Drugs@FDA)
European Union: 25 Aug 1996 · Norvir · EMEA/H/C/000127 (EMA)

From FDA's Drugs@FDA and Purple Book (through openFDA) and the European Medicines Agency, files of Sept 2026 and 27 Oct 2026. National approvals in Europe and other countries are not included. How this is worked out

How studies write it

Studies that test it under each name

Name

Ritonavir: 161
Ritonavir (RTV): 7
RIT: 3
Norvir, RTV: 2
Ritonavir tablet: 2

Brand

Norvir: 38

Other names

RTV: 15

In one entry with another drug

Given together, or one or the other

LPV/r: 7
ombitasvir/paritaprevir/ritonavir and dasabuvir: 6
dasabuvir also known as ABT-333: 6
fosamprenavir/ritonavir: 5
Saquinavir/ritonavir: 4
PF-07321332/ritonavir: 3
Atazanavir + Ritonavir: 3
Saquinavir and Ritonavir: 2

Studies by the year they started

268 studies that test it; most in 2008 (22)

Studies that test Ritonavir, by start year
Year	Studies
1998	1
1999	5
2000	5
2001	5
2002	5
2003	5
2004	10
2005	15
2006	18
2007	16
2008	22
2009	22
2010	16
2011	20
2012	16
2013	7
2014	11
2015	20
2016	8
2017	5
2018	5
2019	5
2020	8
2021	4
2022	8
2023	3
2025	2
2026	1

By phase

A phase 1/2 study counts in both.

Early Phase 1: 2
Phase 1: 114
Phase 2: 72
Phase 3: 54
Phase 4: 46
No phase: 18

What it is tested for

Each study’s main condition, where its own words name it, so a study counts once.

HIV Infections: 115
Hepatitis C: 16
Hepatitis C, Chronic: 13
COVID-19: 9
Acquired Immunodeficiency Syndrome: 7
Infections: 7
Hepatitis D, Chronic: 3
Hepatitis D: 3
Hepatitis B, Chronic: 2
Brain Neoplasms: 2
Pulmonary Arterial Hypertension: 2
Anemia: 1

Who runs them

Industry 163 · Other 132

Boehringer Ingelheim (25) · Hoffmann-La Roche (23) · National Institute of Allergy and Infectious Diseases (NIAID) (20) · Bristol-Myers Squibb (19) · ViiV Healthcare (12) · Pfizer (10) · GlaxoSmithKline (9) · AbbVie (8)

Often tested with

Tested in the same studies.

Atazanavir (50) · Darunavir (43) · Lopinavir (39) · Tipranavir (22) · Tenofovir (20) · Lamivudine (19) · Fosamprenavir (19) · Efavirenz (19)

Related medicines

As reviewed, each with the page that says it.

One of Cytochrome P-450 CYP3A Inhibitors source
One of Protease Inhibitors source

Studies

Open first, then newest update. How each study uses Ritonavir is read from its arms, and is right about nine times in ten. Ask us to read each study. These are the studies that list it as an intervention; a search of ClinicalTrials.gov also finds studies that mention it only in a description, such as earlier treatment.

Testing it · 295

See all 295 studies that test Ritonavir →

Given beside what is tested · 144 — Ritonavir is usual care or a partner of the new treatment

Showing 20 of 144.

As the comparator · 21 — what is tested is compared with Ritonavir

Showing 20 of 21.

Codes

What other systems call Ritonavir · ClinicalTrials.gg INT008705

MeSH (NLM) D019438RitonavirConfirmed ClinicalTrials.gov, NLM, Wikidata
UNII (FDA) O3J8G9O825RITONAVIRConfirmed FDA, NLM, Wikidata
RxNorm 85762Confirmed FDA, Wikidata
Wikidata Q422618ritonavirConfirmed FDA, NLM, Wikidata
NCI Thesaurus C1609RitonavirOne source FDA
DrugBank DB00503One source Wikidata

System	Code	Name there	Checked by
MeSH (NLM)	D019438	Ritonavir	Confirmed ClinicalTrials.gov, NLM, Wikidata
UNII (FDA)	O3J8G9O825	RITONAVIR	Confirmed FDA, NLM, Wikidata
RxNorm	85762	—	Confirmed FDA, Wikidata
Wikidata	Q422618	ritonavir	Confirmed FDA, NLM, Wikidata
NCI Thesaurus	C1609	Ritonavir	One source FDA
DrugBank	DB00503	—	One source Wikidata

“Confirmed” means two independent publishers link the code to this drug; “one source”, one does and its name agrees.