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ARS-1

Phase 2

Urticaria | Small molecule | Dermatology |ARS Pharmaceuticals, Inc.|Last Updated: Apr 7, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedCONTROLLEDBiomarker
Total Trials1
Total Enrollment21
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05496465Safety and Efficacy of Intranasal Epinephrine After Administration of ARS -1 in Subjects With Frequent Urticaria FlaresPHASE2 COMPLETED 21Jul 28, 2022Feb 29, 2024Apr 7, 20262 United States
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Study Endpoints
Primary Endpoints
Effect of ARS-1 Versus Placebo Based on a Patient Reported Pruritus/Hive Score
UAS score at 120 (± 10 min) minutes after dosing.

Assess time to effect and duration of effect on acute flares associated with urticaria based on a patient reported pruritus/hive score, from 0 (none) to 3 (severe) for itch and hive using Uniform Assessment System (UAS) as below: Severity Score Amount of Itch Itch Severity 0 None None 1. Mild Easily tolerated 2. Moderate Bothersome but tolerable 3. Intense Difficult to tolerate Hive Severity Score Number of Hives 0 None 1. 1-6 2. 7-12 3. \>12

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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelCROSSOVER
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Sequence 1EXPERIMENTAL1 mg ARS-1 IN: placebo: 2 mg ARS-1 IN
Sequence 2EXPERIMENTAL2 mg ARS-1 IN: placebo: 1 mg ARS-1
Interventions
NameTypeDescription
ARS-1DRUGA single treatment of ARS-1 1mg, 2 mg or placebo
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Eligibility Criteria
Age Range18 Years — 65 Years
SexALL
Healthy VolunteersNo
Study Sites2

Inclusion Criteria: * 1\. Male or female subject between the ages of 18 and 65 years. * 2\. Clinically diagnosed urticaria with acute symptom flares at least two (2) times a week while on a chronic treatment. * 3\. Body weight more than 30 kg and body mass index between 18 and 34 kg/m². * 4\. Has n...

Countries:United States
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