Recent Updates
Recently added Catalysts

EDP-323

Phase 1

RSV Infection | Small molecule | Infectious Disease |Enanta Pharmaceuticals, Inc.|Trials Updated: Jul 1, 2025

EDP-323 development status

Highest phase Phase 1
Registered trials 3 across 1 sponsor since Oct 2022

EDP-323 target and mechanism

Molecular targetL-protein
Target classProtein
ModalitySmall molecule

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials3
Total Enrollment154

FDA Designations

No designations recorded

EDP-323 clinical trials

EDP-323 · 3 trials · 3 indications

Phase 1 3
NCT06917508A Study to Evaluate the Drug-Drug Interaction of EDP-323 With Midazolam, Caffeine, and Rosuvastatin in Healthy ParticipantsRSV Infection
COMPLETED24 Analytics
NCT06847464A Drug-Drug Interaction Study to Evaluate the Effects of Itraconazole, Carbamazepine, Quinidine and Fluconazole on the Pharmacokinetics and Safety of EDP-323.RSV Infection
COMPLETED48 Analytics
NCT05587478A Study of EDP-323 in Healthy SubjectsRSV Infection
COMPLETED82 Analytics
PHASE1COMPLETED
A Study to Evaluate the Drug-Drug Interaction of EDP-323 With Midazolam, Caffeine, and Rosuvastatin in Healthy Participants
RSV InfectionUnlock trial analytics
PHASE1COMPLETED
A Drug-Drug Interaction Study to Evaluate the Effects of Itraconazole, Carbamazepine, Quinidine and Fluconazole on the Pharmacokinetics and Safety of EDP-323.
RSV InfectionUnlock trial analytics
PHASE1COMPLETED
A Study of EDP-323 in Healthy Subjects
RSV InfectionUnlock trial analytics

Study Endpoints

Primary Endpoints

Cmax of midazolam, caffeine, and rosuvastatin with and without the coadministration of EDP-323
Up to 17 Days
AUC of midazolam, caffeine, and rosuvastatin with and without the coadministration of EDP-323
Up to 17 Days
Cmax of EDP-323 with and without coadministration with Itraconazole
Day 1 through Day 19
AUC of EDP-323 with and without coadministration with Itraconazole
Day 1 through Day 19
Cmax of EDP-323 with and without coadministration with Carbamazepine
Day 1 through Day 28
AUC of EDP-323 with and without coadministration with Carbamazepine
Day 1 through Day 28
Cmax of EDP-323 with and without coadministration with Quinidine
Day 1 through Day 13
AUC of EDP-323 with and without coadministration with Quinidine
Day 1 through Day 13
Cmax of EDP-323 with and without coadministration with fluconazole
Day 1 through Day 19
AUC of EDP-323 with and without coadministration with fluconazole
Day 1 through Day 19
Safety measured by adverse events
Up to 8 Days in SAD Cohorts

Secondary Endpoints

Safety measured by adverse events
Up to 22 days
Cmax of EDP-323
Up to 5 Days in SAD Cohorts
AUC of EDP-323
Up to 5 Days in SAD Cohorts
Unlock Study Endpoints

Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
EDP-323, midazolam, caffeine and rosuvastatinEXPERIMENTALSubjects will receive EDP-323, midazolam, caffeine and rosuvastatin throughout the treatment period on respective dosing days
EDP-323 and itraconazole interaction (Part 1)EXPERIMENTALSubjects will receive EDP-323 and itraconazole on respective dosing days
EDP-323 and carbamazepine interaction (Part 2)EXPERIMENTALSubjects will receive EDP-323 and carbamazepine on respective dosing days
EDP-323 and quinidine interaction (Part 3)EXPERIMENTALSubjects will receive EDP-323 and quinidine on respective dosing days
EDP-323 and fluconazole interaction (Part 4)EXPERIMENTALSubjects will receive EDP-323 and fluconazole on respective dosing days
EDP-323 SAD CohortsEXPERIMENTALEDP-323 Dose 1, Dose 2, Dose 3, Dose 4, Dose 5 and Dose 6, orally, once daily in one single administration
EDP-323 MAD CohortsEXPERIMENTALEDP-323 Dose 1, Dose 2, Dose 3 and Dose 4 orally, once daily for 7 days
EDP-323 SAD Placebo CohortsPLACEBO_COMPARATORMatching placebo, orally, once daily in one single administration
EDP-323 MAD Placebo CohortsPLACEBO_COMPARATORMatching placebo, orally, once daily for 7 days

Interventions

NameTypeDescription
EDP-323DRUGSubjects will receive EDP-323 once daily on Days 5-15
MidazolamDRUGSubjects will receive midazolam once daily on Days 1 and 12
CaffeineDRUGSubjects will receive caffeine once daily on Days 1 and 12
RosuvastatinDRUGSubjects will receive rosuvastatin once daily on Days 2 and 13
ItraconazoleDRUGSubjects will receive itraconazole QD Days 5-18
carbamazepineDRUGSubjects will receive carbamazepine on Days 5 - 27
QuinidineDRUGSubjects will receive quinidine on Days 5-12
fluconazoleDRUGSubjects will receive fluconazole on Days 5-18
PlaceboDRUGPlacebo to match EDP-323, oral administration
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * An informed consent document signed and dated by the subject * Healthy male and female subjects of any ethnic origin between the ages of 18 and 65 years, inclusive * Screening body weight \>50 kg and body mass index (BMI) of 18 to 32 kg/m2 * Female subjects of childbearing pot...

Countries:United States
Unlock Eligibility Criteria

Frequently asked questions about EDP-323

What is EDP-323?

EDP-323 is an investigational small molecule antiviral being developed by Enanta Pharmaceuticals for the treatment of respiratory syncytial virus, or RSV, infection. It is designed to target the RSV L-protein and is currently in Phase 1 clinical development.

What does EDP-323 target?

EDP-323 targets the RSV L-protein, a viral protein class target. By acting on the L-protein, the drug is intended to interfere with RSV viral replication. This mechanism underlies its development as an antiviral candidate for RSV infection.

Who is developing EDP-323?

EDP-323 is being developed by Enanta Pharmaceuticals, Inc., which trades on the Nasdaq under the ticker ENTA. Enanta is the sponsor of the clinical program evaluating the drug in RSV infection.

What phase is EDP-323 in?

EDP-323 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA. All three of its registered Phase 1 trials have been completed, and no trials are currently active.

What clinical trials is EDP-323 in?

EDP-323 has been studied in three completed Phase 1 trials: NCT05587478, a healthy subject study with 82 participants; NCT06847464, a drug-drug interaction study with 48 participants; and NCT06917508, a drug-drug interaction study with midazolam, caffeine, and rosuvastatin in 24 participants. All enrolled healthy volunteers in the United States.