omeprazole
noun
omep·ra·zole
ō-ˈme-prə-ˌzōl 
-ˈmē-,
-ˌzȯl
: a benzimidazole derivative C17H19N3O3S that inhibits gastric acid secretion
Examples of omeprazole in a Sentence
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Proton pump inhibitors: Acid-reducing drugs such as Prilosec (omeprazole) may cause low magnesium levels when taken for prolonged periods.
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Trang Tran, Verywell Health, 30 Jan. 2026
Examples of these medications include Prilosec (omeprazole) and Pepcid (famotidine).
—Health, 20 Jan. 2026
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Trang Tran, Verywell Health, 30 Jan. 2026
Examples of these medications include Prilosec (omeprazole) and Pepcid (famotidine).
—Health, 20 Jan. 2026
See All Example Sentences for omeprazole
Cite this Entry
“Omeprazole.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/omeprazole. Accessed 17 Feb. 2026.
Copy CitationMedical Definition
omeprazole
noun
omep·ra·zole
ō-ˈmep-rə-ˌzōl
-ˈmē-prə-
-ˈmē-prə-
-ˌzȯl
: a drug C17H19N3O3S that inhibits gastric acid secretion and is taken orally in the short-term treatment of duodenal and gastric ulcers, gastroesophageal reflux disease, erosive esophagitis, and disorders (such as Zollinger-Ellison syndrome) involving gastric acid hypersecretion
Note: Omeprazole is a benzimidazole derivative that acts by inhibiting the activity of proton pumps in the stomach. It is marketed under the trademark Prilosec.
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