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D961H

Phase 3

Reflux Esophagitis | Small molecule | Gastrointestinal |AstraZeneca PLC|Last Updated: Mar 4, 2026

Success Probability

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment50

FDA Designations

No designations recorded

Clinical trial landscape

D961H · 3 trials · 5 indications

Phase 3 1Phase 1 2
NCT03553563A Study of Esomeplazole (D961H) in Japanese Paediatric Patients With Reflux Esophagitis, Gastric Ulcer or Duodenal UlcerReflux Esophagitis
COMPLETED50 Analytics
PHASE3COMPLETED
A Study of Esomeplazole (D961H) in Japanese Paediatric Patients With Reflux Esophagitis, Gastric Ulcer or Duodenal Ulcer
Reflux EsophagitisUnlock trial analytics

Study Endpoints

Primary Endpoints

Presence/Absence of Reflux Esophagitis Relapse
8 to 32 weeks

Maintenance therapy for healed reflux esophagitis study part: Presence/absence of reflux esophagitis relapse from 8 to 32 weeks for all participants by assessment of the composite endpoint (reflux esophagitis -related symptoms or optional esophagogastroduodenoscopy findings) during the maintenance therapy.

Presence/Absence of Gastric Ulcer or Duodenal Ulcer Recurrence
0 to 32 weeks

Prevention of gastric ulcer or duodenal ulcer recurrence associated with long term non-steroidal anti-inflammatory drugs or low-dose aspirin therapy study part: Presence/absence of gastric ulcer or duodenal ulcer recurrence from 0 to 32 weeks for all participants by assessment of the composite endpoint (gastric ulcer or duodenal ulcer-related symptoms or optional esophagogastroduodenoscopy findings) during the prevention therapy.

Adverse Events During Reflux Esophagitis Maintenance Therapy
8 to 32 weeks

Maintenance therapy for healed reflux esophagitis study part: Safety from 8 to 32 weeks for all participants. Number of participants with any adverse event during the period.

Adverse Events During Gastric Ulcer or Duodenal Ulcer Recurrence Prevention Therapy
0 to 32 weeks

Prevention of gastric ulcer or duodenal ulcer recurrence associated with long term non-steroidal anti-inflammatory drugs or low-dose aspirin therapy study part: Safety from 0 to 32 weeks for all participants. Number of participants with any adverse event during the period.

To assess the pharmacodynamics (intragastric pH) after repeated administration of D961H 10 mg and omeprazole 10 mg in Japanese healthy male subjects by the assessment of percentage of time with intragastric pH>4.
A range of 24 hrs
Confirm the HPMC capsule of D961H 40 mg is bioequivalent to the gelatin capsule of D961H 40 mg by assessment of area under the plasma concentration-time curve at steady state on Day 5
PK sample at Day 5 of treatment period 1 and treatment period 2

Secondary Endpoints

Presence/Absence of Reflux Esophagitis Relapse
8 to 52 weeks
Presence/Absence of Gastric Ulcer or Duodenal Ulcer Recurrence
0 to 52 weeks
Adverse Events During Reflux Esophagitis Maintenance Therapy
8 to 52 weeks
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
Group1EXPERIMENTALInitial healing phase (8 weeks), D961H 10 mg once-daily; Maintenance phase (24 or 44 weeks), D961H 10 mg once-daily
Group2EXPERIMENTALInitial healing phase (8 weeks), D961H 20 mg once-daily; Maintenance phase (24 or 44 weeks) starts with D961H 10 mg once-daily and may be increased to 20 mg once-daily based on investigator's discretion
Group3EXPERIMENTALD961H 10 mg once-daily (32 or 52 weeks)
Group4EXPERIMENTALD961H starts with 10 mg once-daily, and may be increased to 20 mg once-daily based on investigator's discretion (32 or 52 weeks)
D961H 10 mg capsuleEXPERIMENTAL2 way crossover
Omeprazole 10 mg tabletEXPERIMENTAL2 way crossover
D961H 40 mg gelatin capsuleEXPERIMENTAL2 way crossover
D961H 40 mg HPMC capsuleEXPERIMENTAL2 way crossover

Interventions

NameTypeDescription
D961H capsule 10mgDRUGAll Groups can select either capsule or sachet during the study.
D961H sachet 10mgDRUGAll Groups can select either capsule or sachet during the study.
D961HDRUGOral, capsule
OmeprazoleDRUGOral, tablet
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Eligibility Criteria

Age Range1 Year to 14 Years
SexALL
Healthy VolunteersNo
Study Sites15

Inclusion Criteria: For healed reflux esophagitis study * Endoscopically verified reflux esophagitis, Grade A or higher according to the Los Angels classification as judged by central evaluation committee. For prevention of gastric ulcer or duodenal ulcer recurrence study * Patients with documen...

Countries:Japan
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Frequently asked questions about D961H

What is D961H used for?

D961H is an investigational small molecule being studied for use in reflux esophagitis, gastric ulcer, and duodenal ulcer, primarily in Japanese patients. It has also been evaluated in healthy volunteers for pharmacodynamic and pharmacokinetic studies. The drug is being developed by AstraZeneca PLC (AZN) and is currently in clinical development.

How does D961H work?

D961H is a small molecule developed by AstraZeneca. While its specific molecular target is not publicly detailed, it is being studied for acid-related gastrointestinal conditions such as reflux esophagitis and peptic ulcers, suggesting it acts to reduce gastric acid secretion. The drug is being evaluated in clinical trials for these indications.

Who makes D961H?

D961H is being developed by AstraZeneca PLC, a multinational pharmaceutical company listed on the NASDAQ under the ticker AZN. AstraZeneca is conducting clinical trials of D961H in Japan, focusing on gastrointestinal conditions such as reflux esophagitis and peptic ulcers.

What phase is D961H in?

D961H is in Phase 1 clinical development, with one completed Phase 1 trial. However, a Phase 3 trial in pediatric patients with reflux esophagitis, gastric ulcer, or duodenal ulcer has also been completed. The drug is investigational and has not been approved by regulatory authorities.

What clinical trials is D961H in?

D961H has been studied in three completed clinical trials: NCT00930215, a Phase 1 study comparing gelatine and HPMC capsules in healthy Japanese males; NCT01159145, a Phase 1 pharmacodynamic/pharmacokinetic study; and NCT03553563, a Phase 3 study in Japanese pediatric patients with reflux esophagitis, gastric ulcer, or duodenal ulcer.

Is D961H the same as esomeprazole?

Yes, D961H is also known as esomeprazole, as indicated in the Phase 3 trial title. Esomeprazole is a proton pump inhibitor used to treat acid-related conditions. D961H is being studied for similar indications, including reflux esophagitis and peptic ulcers, in Japanese populations.