Small molecules in advanced clinical trials for AD

TargetDrugRouteStatusGlobal endpoints achievedReported adverse effectsReferences
JAK1UpadacitinibOralApprovedEASI-75; EASI-90; EASI-100; IGA 0/1Nasopharyngitis, acne, headache, oral herpes, diarrhea, eczema, herpes zoster[111114]
AbrocitinibOralApprovedIGA 0/1; EASI-50; EASI-75Transient decreased platelet count, acne, dizziness, nasopharyngitis, acne, headache, oral herpes, vomiting, diarrhoea, eczema, herpes zoster, nausea, folliculitis[115120]
LNK01001OralPhase IIIOngoingOngoingNCT06277245
SHR0302OralPhase II; Phase II/IIIIGA 0/1; EASI-75Blood pressure increased, upper respiratory tract infection, folliculitis, urinary tract infection, hyperlipidemia, hyperuricemia, headache[121]
NCT04717310
JAK1/2BaricitinibOralApprovedIGA 0/1; EASI-75Headache, increased blood CPK, nasopharyngitis, herpes simplex, influenza, diarrhea, nausea, folliculitis, back pain, acne[122128]
RuxolitinibTopicalApprovedIGA 0/1; EASI-75; EASI-90Nasopharyngitis, headache[129131]
JAK1/3TofacitinibTopicalPhase IIaEASI-75Viral upper respiratory tract infection, gastroenteritis, bronchitis, nausea[132]
ATI-1777TopicalPhase IIa/bmEASI-75Blood CPK increased, headache[133]
NCT05432596
ATI-502TopicalPhase IIbNo significant efficacyNone reported[134]
NCT03585296
JAK1/TYK2BrepocitinibTopicalPhase IIbEASI-90Nasopharyngitis, erythema[135]
JAK1/2/3/TYK2DelgocitinibTopicalApproved (Japan)mEASI-50; mEASI-75; mEASI-90Acne, folliculitis, gastroenteritis, herpes simplex, paronychia, nasopharyngitis[136140]
Pan-JAKJaktinibOralPhase IIIOngoingOngoingNCT05526222
NCT05676242
PDE4CrisaboroleTopicalApprovedIGA 0/1Application-site pain, upper respiratory tract infection, nasopharyngitis, headache, oropharyngeal pain, cough[141143]
PDE4LotamilastTopicalPhase IINot availableNot availableNCT03394677
PDE4DRM02TopicalPhase IINot availableNot availableNCT01993420
PDE4DifamilastTopicalApproved (Japan)IGA 0/1; EASI-75; EASI-90Nasopharyngitis, folliculitis, gastroenteritis[144146]
NCT05571943
NCT05372653
PDE4RoflumilastTopicalPhase IIIIGA 0/1; EASI-75Headache, nausea, application-site pain, nasopharyngitis, Covid-19, upper respiratory tract infection, diarrhea, vomiting[147]
NCT04773587
NCT04773600
P2X3BLU-5937OralPhase IINot availableNot availableNCT04693195
NK1RSerlopitantOralPhase IINo significant efficacyNasopharyngitis, urinary tract infectionNCT02975206
NK1RTradipitantOralPhase IIIWI-NRS ≥ 4; IGA 0/1; SCORAD 50Not available[148]
NCT04140695
KORDifelikefalinOralPhase III-NRS ≥ 4Abdominal pain/discomfort, nausea, dry mouth, headache, dizziness, hypertension, hyponatremia, nephrolithiasis, costochondritis[149]
S1PR1VibozilimobOralPhase IIOngoingOngoingNCT04684485
S1PR1UdifitimodOralPhase IINo significant efficacySkin mass, depression, upper respiratory tract infection, pyrexiaNCT05014438
S1PR1/S1PR4/S1PR5EtrasimodOralPhase IIbEASI-50Nausea, constipation, back pain, dizziness[110]
H4RAdriforantOralPhase IIEASI-75Headache, somnolence, nasopharyngitis, eczema, urinary tract infection[150]
GPCR19HY209TopicalPhase IINot availableNot availableNCT04530643
LXRVTP-38543TopicalPhase I/IINo significant efficacyUpper respiratory tract infection, fatigue, cellulitis, dizziness, pruritus[151]
LXRALX-101TopicalPhase IIbNot availableNot availableNCT03859986

CPK: creatine phosphokinase; EASI: eczema area and severity index; EASI 50/75/90: ≥ 50/75/90% improvement in EASI from baseline; GPCR19: G protein-coupled receptor 19; H4R: type 4 histamine receptor; IGA: investigator global assessment; IGA 0/1: “clear or almost clear” with ≥ 2-point improvement in IGA from baseline; I-NRS: itch numeric rating scale; JAK: janus kinase; KOR: kappa opioid receptor; LXR: liver X receptor; mEASI: modified eczema area and severity index; mEASI 50/75/90: ≥ 50/75/90% improvement in mEASI from baseline; NCT: national clinical trial identifier consultable on www.clinicaltrials.gov (website consulted last time as of April 30, 2024), only clinical trials in advanced phases (Phase II onwards) are listed; NK1R: neurokinin 1 receptor; PDE4: phosphodiesterase 4; Pan-JAK: multiple janus kinases inhibitor; P2X3: purinergic receptor P2X; SCORAD: scoring atopic dermatitis; SCORAD 50: ≥ 50% improvement in SCORAD from baseline; S1PR1/4/5: sphingosine 1-phosphate receptor 1/4/5; TYK: tyrosine kinase; WI-NRS: worst itch numeric rating scale; WI-NRS/I-NRS ≥ 4: ≥ 4-point change in WI-NRS/I-NRS from baseline