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EDP-323

Phase 1

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

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials3
Total Enrollment154

FDA Designations

No designations recorded

Clinical trial landscape

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
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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
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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
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Frequently asked questions about EDP-323

What is EDP-323 used for?

EDP-323 is an investigational small molecule being developed for the treatment of RSV infection, a respiratory illness caused by respiratory syncytial virus. It is currently in Phase 1 clinical development and has not been approved by regulatory authorities.

Who makes EDP-323?

EDP-323 is being developed by Enanta Pharmaceuticals, Inc., a biopharmaceutical company traded on NASDAQ under the ticker symbol ENTA. The company is conducting clinical trials to evaluate the safety and pharmacokinetics of this investigational drug.

What phase is EDP-323 in?

EDP-323 is in Phase 1 clinical development. All three completed trials for this drug were Phase 1 studies, and the drug remains investigational, meaning it has not yet received regulatory approval for any use.

What clinical trials is EDP-323 in?

EDP-323 has completed three Phase 1 clinical trials: NCT05587478, a study in healthy subjects; NCT06847464, a drug-drug interaction study with itraconazole, carbamazepine, quinidine, and fluconazole; and NCT06917508, a drug-drug interaction study with midazolam, caffeine, and rosuvastatin. All trials were conducted in the United States.

Is EDP-323 FDA approved?

EDP-323 is not FDA approved. It is an investigational drug currently in Phase 1 clinical development, with all completed trials being early-stage studies in healthy volunteers. The drug has not yet demonstrated efficacy in patients or received marketing authorization.