Recent Updates
Recently added Catalysts

IHL-42X Low Dose

Phase 2

Obstructive Sleep Apnea | Small molecule | Other |Incannex Healthcare Inc.|Last Updated: Apr 20, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials2
Total Enrollment685
FDA Designations
FAST_TRACK
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06146101RePOSA-Revealing the Efficacy of IHL-42X Use in Patients With OSAPHASE2 ACTIVE NOT_RECRUITING 560May 2, 2024Dec 1, 2026Apr 20, 202520 United States
NCT05857384Bioavailability, Bioequivalence and Tolerability of IHL-42X Compared to the Reference DrugsPHASE1 COMPLETED 125Sep 8, 2023Jul 31, 2024Jan 17, 20254 Australia
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Change in apnea-hypopnea index (AHI)
4 weeks

Phase 2 - Assess the change in AHI compared to baseline

Bioavailability of IHL-42X
28 days

Assess the proportion of IHL-42X that is taken up and enters the circulation post dose.

Bioequivalence of IHL-42X
28 days

Compare the proportion of IHL-42X taken up and enters the circulation to the reference listed drugs for dronabinol and acetazolamide. It will be determined whereby 90% confidence interval for the ratio of averages of measures Cmax and AUC0-inf for IHL-42X and the reference listed drug.

Effect of food on IHL-42X - maximum observed drug concentration
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring Cmax (Maximum observed drug concentration)

Effect of food on IHL-42X - time of the maximum drug concentration
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring Tmax (time of the maximum drug concentration)

Effect of food on IHL-42X - area under the drug concentration time curve from time zero to time of last measurable concentration
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring AUC0-last (Area under the drug concentration-time curve, from time zero to time of last measurable concentration)

Effect of food on IHL-42X - area under the drug concentration time curve from time zero to infinity
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring AUC0-inf (Area under the drug concentration-time curve from time zero to infinity)

Effect of food on IHL-42X - area under the drug concentration time curve from time zero to 12 hours
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring AUC0-12h (Area under the drug concentration-time curve from time zero to 12 hours)

Effect of food on IHL-42X - area under the drug concentration time curve from time zero to 24 hours
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring AUC0-24h (Area under the drug concentration-time curve from time zero to 24 hours)

Effect of food on IHL-42X - the elimination half-life
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring t1/2 (the elimination half-life)

Effect of food on IHL-42X - terminal elimination rate constant
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring kel (Terminal elimination rate constant)

Effect of food on IHL-42X - apparent total body clearance
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring CL/F (Apparent total body clearance)

Effect of food on IHL-42X - apparent volume of distribution
7 days

Assess the effect of food on the uptake and absorption of IHL-42X by measuring Vz/F (Apparent volume of distribution)

Secondary Endpoints
Safety and tolerability
28 days
Unlock Study Endpoints
Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Phase 2 Investigational Product - IHL-42X Low doseEXPERIMENTALIHL-42X (2.5 mg dronabinol + 125 mg acetazolamide), one capsule self-administered once daily every night approximately 1 hour prior to bed for 4 weeks.
Phase 2 Investigational Product - IHL-42X High doseEXPERIMENTALIHL-42X (5 mg dronabinol + 250 mg acetazolamide), one capsule self-administered once daily every night approximately 1 hour prior to bed for 4 weeks.
Phase 2 PlaceboPLACEBO_COMPARATOROne capsule self-administered once daily every night approximately 1 hour prior to bed for 4 weeks.
Phase 3 Investigational Product - IHL-42XEXPERIMENTALIHL-42X (dose will be identified based on the safety and efficacy results in Phase II), one capsule self-administered once daily every night approximately 1 hour prior to bed for 52 weeks.
Phase 3 Comparator - Reference Listed Drug/DronabinolACTIVE_COMPARATOROne capsule of dronabinol (equivalent dose strength to that in the IHL-42X optimal dose strength) self-administered once daily every night approximately 1 hour prior to bed for 3 months then IHL-42X (optimal dose) one capsule self-administered once daily every night approximately 1 hour prior to bed for the remaining 9 months.
Phase 3 Comparator - Reference Listed Drug/AcetazolamideACTIVE_COMPARATOROne capsule of acetazolamide (equivalent dose strength to that in the IHL-42X optimal dose strength) self-administered once daily every night approximately 1 hour prior to bed for 3 months then IHL-42X (optimal dose) one capsule self-administered once daily every night approximately 1 hour prior to bed for the remaining 9 months.
Phase 3 PlaceboPLACEBO_COMPARATOROne capsule self-administered once daily every night approximately 1 hour prior to bed for 52 weeks.
Comparator Arm A- Reference Listed Drug/MarinolACTIVE_COMPARATORdronabinol 5 mg, two capsules of 2.5 mg administered on an empty stomach once only in the study period
Comparator Arm B-Reference Listed Drug/Taro AcetazolamideACTIVE_COMPARATOR250 mg acetazolamide, one tablet administered on an empty stomach once only in the study period
Investigational Product Arm C-IHL42X FastedEXPERIMENTALIHL-42X (5 mg dronabinol, 250 mg acetazolamide), one capsule administered on an empty stomach once only in the study period
Investigational Product Arm D-IHL42X FedEXPERIMENTALIHL-42X (5 mg dronabinol, 250 mg acetazolamide), one capsule administered after food once only in the study period
Interventions
NameTypeDescription
IHL-42X Low DoseDRUGSoftgel capsule
IHL-42X High DoseDRUGSoftgel capsule
PlaceboDRUGSoftgel capsule
IHL-42X (Optimal Dose)DRUGSoftgel capsule
DronabinolDRUGSoftgel capsule
AcetazolamideDRUGSoftgel capsule
IHL42XDRUGIHL-42X consists of acetazolamide and dronabinol.
Acetazolamide 250 MGDRUGA solid tablet containing 250 mg acetazolamide
Dronabinol 2.5 MGDRUGA soft gelatin capsules containing 2.5mg dronabinol
Unlock Study Design Details
Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites20

Inclusion Criteria: 1. Aged ≥18 years of age 2. Screening polysomnography (PSG) findings confirmed on central over-read: 1. AHI ≥15 2. ≤ 25% central or mixed apneas/hypopneas 3. no Cheyne-Stokes respiration 4. total sleep time ≥ 2 hours 3. Intolerant, non-compliant, or naïve to PAP (No...

Countries:United StatesAustralia
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06146101primaryCompletionDate: changed
LOWMay 24, 2026NCT06146101studyFirstPostDate: changed