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L606

Phase 3

Pulmonary Arterial Hypertension | Small molecule | Cardiovascular |Liquidia Corporation|Last Updated: Apr 1, 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
UNCONTROLLEDBiomarker
Total Trials1
Total Enrollment28
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04691154A Phase 3 Study to Evaluate the Safety and Tolerability of L606 in Subjects With PAH or PH-ILDPHASE3 ACTIVE NOT_RECRUITING 28Aug 1, 2021Mar 31, 2031Apr 1, 20268 United States
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Study Endpoints
Primary Endpoints
Safety/Tolerability assessed by incidence of treatment-emergent AEs/SAEs
2 weeks

(MSP for Cohort A): Proportion of patients with PAH or PH-ILD on a stable Tyvaso dose who would develop treatment-emergent AEs/SAEs after switching to L606 dosing for up to 2 weeks during MSP.

Safety/Tolerability assessed by incidence of treatment-emergent AEs/SAEs (long-term)
48 weeks

(OEP for Cohorts A and B): Proportion of subjects with PAH or PH-ILD, choosing to continue twice daily L606 dosing for up to 48 weeks, who would develop treatment emergent AEs/SAEs up to 48 hours after the last dose.

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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
L606EXPERIMENTAL -
Interventions
NameTypeDescription
L606 inhalation suspensionCOMBINATION_PRODUCTL606 inhalation suspension
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Eligibility Criteria
Age Range18 Years — 80 Years
SexALL
Healthy VolunteersNo
Study Sites8

Key Inclusion Criteria: 1. Males and females ≥18 and ≤80 years of age. 2. Diagnosed with 1. PAH belonging to at least 1 of the following subgroups of Group 1 pulmonary hypertension (PH) per European Society of Cardiology/European Respiratory Society Guidelines for the diagnosis and treatment of...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT04691154primaryCompletionDate: changed
LOWMay 24, 2026NCT04691154studyFirstPostDate: changed