Esomeprazole Alternative Names
Esomeprazole is also known as Nexium (brand name) and S-omeprazole (chemical name), representing the S-isomer of the racemic mixture omeprazole 1, 2.
Brand and Chemical Nomenclature
Esomeprazole has several recognized names in clinical practice:
- Nexium: The primary brand name under which esomeprazole is marketed 1, 2, 3
- S-omeprazole: The chemical designation indicating it is the S-enantiomer of omeprazole 2, 4, 3
- Esomeprazole magnesium: The full pharmaceutical name, often specified as esomeprazole magnesium trihydrate in formulations 1
Clinical Context
Esomeprazole represents the first proton pump inhibitor developed as a single optical isomer rather than a racemic mixture 2, 4, 5. This distinction is clinically relevant because the S-isomer formulation provides improved pharmacokinetics compared to the racemic omeprazole, with reduced first-pass metabolism and increased systemic exposure 4, 3.
The drug is available in multiple formulations including delayed-release capsules at standard doses of 20 mg and 40 mg 1. Recent guidelines recognize esomeprazole as one of the higher-potency proton pump inhibitors, with 20 mg esomeprazole considered equivalent to 32 mg omeprazole 6.
When prescribing or discussing this medication with patients, any of these names—esomeprazole, Nexium, or S-omeprazole—refer to the same therapeutic agent.