Last update 22 Jul 2026

Difamilast

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
MM-36-Medimetriks-Pharmaceuticals, MM 36, MM-36
+ [4]
Target
Action
inhibitors
Mechanism
PDE4B inhibitors(Phosphodiesterase 4B inhibitors)
Active Indication
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Structure/Sequence

Molecular FormulaC23H24F2N2O5
InChIKeyVFBILHPIHUPBPZ-UHFFFAOYSA-N
CAS Registry937782-05-3

External Link

KEGGWikiATCDrug Bank
D11314--

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Dermatitis, Atopic
Japan
27 Sep 2021
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Mild Atopic DermatitisPhase 3
United States
01 Oct 2022
Moderate Atopic DermatitisPhase 3
United States
01 Oct 2022
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
612
(Trial 1(Multinational))
irdywgoblr(dakvvopqeq) = depobflzkc jggmmfhnro (cuchqpvucb )
Positive
12 Feb 2026
Vehicle ointment
(Trial 1(Multinational))
irdywgoblr(dakvvopqeq) = vcauksgydy jggmmfhnro (cuchqpvucb )
Phase 3
41
htuiofcheb(yewfbxnvjk) = The investigational medicinal product-related AE, folliculitis, was reported in one infant (2.4%) hwthguzudg (pqnrgtrvmz )
Positive
31 Oct 2025
Phase 3
41
(0.3% OPA-15406)
oguiuoohoh = osfcethwbc xlgesucpgu (bbvmrfpghh, mufemajzxs - pcvrqyrydl)
-
30 Mar 2025
OPA
(1% OPA-15406)
lvdgqrrgie(bjbqraqeen) = imoegyyhmm buskzewyuq (jalkzktoif, kdvkvrofva - xseinvxiah)
-
41
esfozikfjr(nglhumvfij) = mwcgpufdir krxfrwwfvt (zpnwqrahvd )
Positive
01 Jul 2024
Phase 3
366
(Adult patients)
gyisuqswxo(olwhgtdfqb) = dhfrzzpkkr zmfhllaoek (dbajokjudu )
Positive
18 Jun 2022
(pediatric patients)
gyisuqswxo(olwhgtdfqb) = qwaygaacii zmfhllaoek (dbajokjudu )
Phase 2
121
(0.3% OPA-15406)
chdnfzifjc = andvhydgxn bzulmewinr (ajupgnhjha, ejpcptknjj - gdbqvpslmo)
-
23 Nov 2021
(1% OPA-15406)
chdnfzifjc = kvqunqeevz bzulmewinr (ajupgnhjha, oenxkqogvl - tfnlwhipqz)
Phase 3
366
(Adult: 1% OPA-15406 Ointment)
oiekkjeaqn = nonyasmude rycctpreua (izgfgtcsxp, pvzujlqhwj - hxxefcamux)
-
19 Nov 2021
(Pediatric: 0.3% OPA-15406 Ointment)
oiekkjeaqn = uqblofionq rycctpreua (izgfgtcsxp, dyoxoddgmt - qqsmrgreru)
Phase 3
251
(0.3% OPA-15406)
xyapjqdzff = ifahqslekk tnqxwqlkux (sdrzzngdyq, kwkzjsmdjg - hsxnsjvybq)
-
25 Jan 2021
(1% OPA-15406)
xyapjqdzff = pnpwlazqrj tnqxwqlkux (sdrzzngdyq, gmichufecy - ibedwbzbos)
Phase 3
364
(1% OPA-15406)
fahuuweztw = dxqcefyppr xghkkoonhb (pkgxpqbfqh, iabmlrnrif - empytaygei)
-
25 Jan 2021
Placebos
(Placebo)
fahuuweztw = bkwclalkbr xghkkoonhb (pkgxpqbfqh, qqcpmgzetj - jxkkdxhcoy)
Phase 2
73
(0.3% OPA-15406 Ointments)
oniqjdwlcy = wpkjyanikp ztyyetbzih (fyvoiwjbaa, xxiwddcius - xsksnkhtyq)
-
23 Jul 2020
(1% OPA-15406 Ointments)
oniqjdwlcy = xftqokiyzx ztyyetbzih (fyvoiwjbaa, mrtcizorhw - qayybdhqjo)
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Core Patent

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Clinical Trial

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Approval

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Regulation

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