omeprazole

From o(xy)- +‎ me(tho)- +‎ -prazole (“benzimidazole derivative”).

• (Received Pronunciation) IPA^(key): /əʊˈmɛp.ɹə.zəʊl/
• (General American) IPA^(key): /oʊˈmɛp.ɹəˌzoʊl/

omeprazole (uncountable)

1. (pharmacology) A substituted benzimidazole (trademark Losec, Prilosec) which is a proton pump inhibitor and inhibits secretion of gastric acid, being given orally in the treatment of ulcers and gastroesophageal reflux; 5-methoxy-2-(4-methoxy-3,5-dimethyl-2-pyridylmethylsulfinyl)benzimidazole, C₁₇H₁₉N₃O₃S.
   • 2001: The first successful drug of this class was omeprazole (sold under the trade name Losec®), and it helped to change the medium-sized Swedish pharmaceutical company Astra, which discovered it, into a major player in the pharmaceutical industry. — Leslie Iversen, Drugs: A Very Short Introduction (Oxford 2001, p. 46)

• esomeprazole

• “omeprazole”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “omeprazole”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.