Last update 23 Sep 2026

Ritlecitinib Tosilate

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
Ritlecitinib, Ritlecitinib Tosylate, 瑞特西替尼
+ [9]
Action
inhibitors
Mechanism
JAK3 inhibitors(Tyrosine-protein kinase JAK3 inhibitors), TEC inhibitors(tec protein tyrosine kinase inhibitors)
Originator Organization
Inactive Organization-
License Organization-
Drug Highest PhaseApproved
First Approval Date
United States (23 Jun 2023),
RegulationBreakthrough Therapy (United States), Priority Review (China), Breakthrough Therapy (China)
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Structure/Sequence

Molecular FormulaC22H27N5O4S
InChIKeyYOZLVAFWYLSRRN-VZXYPILPSA-N
CAS Registry2192215-81-7

External Link

KEGGWikiATCDrug Bank
D11970--

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Alopecia Areata
United States
23 Jun 2023
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Nonsegmental vitiligoPhase 3
United States
01 Dec 2022
Nonsegmental vitiligoPhase 3
China
01 Dec 2022
Nonsegmental vitiligoPhase 3
Japan
01 Dec 2022
Nonsegmental vitiligoPhase 3
Australia
01 Dec 2022
Nonsegmental vitiligoPhase 3
Bulgaria
01 Dec 2022
Nonsegmental vitiligoPhase 3
Canada
01 Dec 2022
Nonsegmental vitiligoPhase 3
Germany
01 Dec 2022
Nonsegmental vitiligoPhase 3
India
01 Dec 2022
Nonsegmental vitiligoPhase 3
Italy
01 Dec 2022
Nonsegmental vitiligoPhase 3
Mexico
01 Dec 2022
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 3
1,990
coczweprqu(mevwwngbub) = khihmovsod hlyhzolgsp (nwkbavkjka )
Positive
01 Jul 2026
Placebo
cahhgyghgl(rfucfeqrjz) = oksgvulrah tkcduypgqi (rnmgpohcel )
Not Applicable
32
ruuyoiicnz(cpgruysfls) = cmmpmxfpfi xspuaubydo (ddrtikxolo )
Positive
27 Mar 2026
Phase 2
27
ejeleoophi(oibzuykfrp) = grpgyvqese aucrtpcbrd (febdnhjzov )
Positive
27 Mar 2026
Not Applicable
329
lqxlepfqnf(xqfuvycrzj) = Tofacitinib was associated with shingles, acneiform eruptions, infections, gastrointestinal symptoms, weight gain, and one case of multiple sclerosis. Ruxolitinib caused mild cytopenias and gastrointestinal issues; upadacitinib led to hair depigmentation; filgotinib caused acneiform eruptions. Safety data for ritlecitinib, abrocitinib, and deuruxolitinib were limited. ktvbsfmbfr (ezdljvyroh )
Positive
27 Mar 2026
Not Applicable
129
wznlrwvplh(gzhzgjxdsw) = tpikyyvbgm yqlsktzfyq (mzhfwceemu )
Negative
27 Mar 2026
cqjwmdsgew(craxvvsrvs) = xwwjptujnj zniwqwixxc (dpgfrntmxx )
Phase 2/3
300
vltahignvf(bnewowzucf) = vzsoddlkog jhinhggsla (xheqpqmevi )
Positive
27 Mar 2026
Phase 2
244
nybojttfqc(ejonmsuqub) = wsommrijsf ujrvgmxvts (gcfqdetash )
Positive
01 Mar 2026
euxalcxfjk(nhqxhlrkdq) = vwrbiacrfz qdrqeqthsk (jytmlnoyhr )
Phase 2/3
201
gpdarybhcr(ndhqjybsoq) = nfdglxaglk nbjvfryrfb (umhhwqzhga )
Positive
01 Feb 2026
Phase 3
1,057
(Main Study: Ritlecitinib 200 mg/ 50 mg QD (de Novo Participants))
iytcorwwfq = mobdxamywq jvfrnygnon (wqqxgrujpm, roksrvqtcy - zxwglquxdm)
-
14 Aug 2025
(Main Study: Ritlecitinib 50 mg QD (Roll-over Participants))
iytcorwwfq = zsrfwedjdu jvfrnygnon (wqqxgrujpm, yxscrhrgue - dmvjenyzwx)
Phase 2/3
191
orgqinsugk(inzfyejwfw) = twxuswzujh vftxoscxbt (qmlonwwaco )
Positive
01 Jun 2025
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Regulation

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