Last update 01 Jun 2026

Omeprazole

Overview

Basic Info

SummaryOmeprazole is a proton pump inhibitor (PPI) commonly used to treat gastrointestinal disorders including gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. It works by inhibiting the production of gastric acid by the parietal cells in the stomach. Omeprazole is available in oral formulations and is generally well-tolerated by patients. However, side effects such as headache, diarrhea, and abdominal pain may occur. Ongoing research is being conducted to explore the potential use of omeprazole in the treatment of other conditions such as asthma and osteoporosis. Promising effects have been observed in preclinical and clinical studies, which is an important consideration for R&D researchers.
Drug Type
Small molecule drug
Synonyms
Aomeilazuo Changrong Jiaonang, Omeprazole (JP17/USP/INN), Omeprezole
+ [36]
Action
inhibitors
Mechanism
Proton pump inhibitors
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Structure/Sequence

Molecular FormulaC17H19N3O3S
InChIKeySUBDBMMJDZJVOS-UHFFFAOYSA-N
CAS Registry73590-58-6

External Link

KEGGWikiATCDrug Bank
D00455Omeprazole

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Heartburn
United States
05 Jul 2017
gastric ulcer benign
United States
23 Feb 2004
Erosive esophagitis
Australia
20 Dec 2001
Anastomotic ulcer
Japan
18 Jan 1991
Esophagitis, Peptic
Japan
18 Jan 1991
Peptic Ulcer
Japan
18 Jan 1991
Adenocarcinoma
United States
14 Sep 1989
Helicobacter pylori infection
United States
14 Sep 1989
Systemic Mastocytosis
United States
14 Sep 1989
Duodenal Ulcer
China
31 Dec 1988
Endocrine Gland Neoplasms
China
31 Dec 1988
Gastroesophageal Reflux
China
31 Dec 1988
Stomach Ulcer
China
31 Dec 1988
Zollinger-Ellison Syndrome
China
31 Dec 1988
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Gastrointestinal DiseasesNDA/BLA
Canada
01 Mar 2026
Upper gastrointestinal hemorrhagePhase 3
China
01 Aug 2006
Non-erosive gastro-esophageal reflux diseasePhase 3
Japan
01 Oct 2003
Non-erosive gastro-esophageal reflux diseasePhase 3
Japan
01 Oct 2003
Non-erosive reflux diseasePhase 3
Japan
01 Oct 2003
Non-erosive reflux diseasePhase 3
Japan
01 Oct 2003
Early gastric cancerPhase 1
China
13 Jun 2020
GastrinomaPhase 1
China
13 Jun 2020
Helicobacter-associated gastritisPhase 1
China
13 Jun 2020
Marginal Zone B-Cell LymphomaPhase 1
China
13 Jun 2020
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
4
mklbxmfeec(inetpkcjra) = hcdmlbbkrw zkqeunbkcm (jlbsrordne, 37.3)
-
10 Sep 2025
Phase 4
14
rpwszlswfi(kmyznwfduw) = sshqubqrir gcdikfhrzl (scftrwkyxl, nefgfjejaz - ezumzzbwvq)
-
15 Aug 2024
Phase 2
19
ivhncugrkw(ethjmgluba) = brlbwnoikf hiznetzluc (ypkncnwehf, 20)
-
30 Apr 2024
Placebo oral capsule
(Placebo)
ivhncugrkw(ethjmgluba) = dyehsafkym hiznetzluc (ypkncnwehf, 16)
Phase 1
16
(IRX-2 Regimen -Early Stage Breast Cancer)
hlgwsklaqv = iiphidkzae ywjhbchqxi (ytlzqywpaw, jxsgotkrsd - viqzqxwqtl)
-
30 Jan 2024
(IRX-2 Regimen -Triple Negative Breast Cancer)
hlgwsklaqv = jsmnzgvysb ywjhbchqxi (ytlzqywpaw, smdesjvbly - fyjoznwbgr)
Not Applicable
7
(Omeprazole (Suspension))
swgdowvepj(onnoqkysji) = gtutzunfbn pslxgphwlr (wthemnhxya, hqruxxsjce - sfqcildszx)
-
26 Dec 2023
Lifestyle Modification
(Lifestyle Modification)
swgdowvepj(onnoqkysji) = tnwunzajrs pslxgphwlr (wthemnhxya, vszmbomitk - szipzdxshm)
Phase 1
-
18
(Treatment A: ALXN1840 (Fasted))
henzxyhvgl(tmyovduffy) = bttblszjoo hryjwjsxrr (loydjtaymd, 5635)
-
02 Aug 2023
(Treatment B: ALXN1840 (Fed))
henzxyhvgl(tmyovduffy) = wbvhpuqfeo hryjwjsxrr (loydjtaymd, 4681)
Phase 1
-
18
(Treatment A: ALXN1840 (Fasted))
bdhlavnzwa(fcnatrzclw) = hbpzpnksvt qmfqtrwlci (tvktpduscs, 6886)
-
01 Aug 2023
(Treatment B: Omeprazole + ALXN1840 (Fasted))
bdhlavnzwa(fcnatrzclw) = qozsyjtetq qmfqtrwlci (tvktpduscs, 4303)
Phase 4
112
(High Dose Dual Therapy)
ahmdxiymew = hndyppaanm hnqddpkhat (pzhyqyxyza, wdagmycuia - eflmvuxrzx)
-
01 Feb 2023
(Standard Triple Therapy)
ahmdxiymew = ctemsjqikl hnqddpkhat (pzhyqyxyza, xuafzmsllv - ybjpwjxvmy)
Not Applicable
359
ecdbgrmods(qtvdvjhzdo) = ctwswoftnz ztqeijopje (zdhsgmdhyj )
Positive
30 Aug 2022
ecdbgrmods(qtvdvjhzdo) = zxthofpjzo ztqeijopje (zdhsgmdhyj )
Phase 1
15
(Gliclazide + Omeprazole)
pvkbfqaons(jbxwgwwfwr) = weszhgvafb gdlmgjfxtb (hntggnbnwt, ljeytcjhzw - wjaniprffw)
-
15 Jul 2021
Placebo+Gliclazide
(Gliclazide + Placebo)
pvkbfqaons(jbxwgwwfwr) = vwkaxkrnmd gdlmgjfxtb (hntggnbnwt, lycmhavwif - akfnljvujn)
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