Nexium 40mg contains Esomeprazole, the S-enantiomer of Omeprazole. By using only the pharmacologically active S-isomer rather than the racemic mixture of R and S isomers in Omeprazole, Nexium achieves more complete and consistent acid suppression because the S-isomer undergoes less first-pass hepatic metabolism, resulting in higher bioavailability and more predictable proton pump inhibition. At the 40mg dose, Nexium provides the strongest level of acid suppression appropriate for erosive oesophagitis, refractory GERD, and conditions requiring more complete acid control than standard 20mg PPI therapy provides.
Specs
- Active ingredient: Esomeprazole Magnesium 40mg
- Drug class: Proton Pump Inhibitor (PPI) - S-isomer of Omeprazole
- Form: Enteric-coated tablets
- Pack size: 14 tablets
- Key advantage: More complete and consistent acid suppression than Omeprazole
- Indication: GERD, erosive oesophagitis, Zollinger-Ellison syndrome
Benefits
- The S-isomer formulation provides higher and more consistent plasma concentrations after oral dosing compared to racemic Omeprazole, because the S-isomer (Esomeprazole) undergoes significantly less first-pass hepatic metabolism than the R-isomer - resulting in more reliable acid suppression across patients with different CYP2C19 metabolizer genotypes
- Provides clinically superior healing rates for erosive oesophagitis compared to Omeprazole in head-to-head trials - this is the primary evidence distinguishing Nexium from generic Omeprazole for the most severe presentations of acid-related oesophageal disease
- The 40mg dose provides maximal PPI effect appropriate for conditions where standard 20mg doses provide insufficient acid suppression - erosive oesophagitis grade C/D, refractory GERD, and Zollinger-Ellison syndrome
- Enteric-coated tablet format protects the Esomeprazole from gastric acid degradation until it reaches the small intestine, where it is absorbed and activated - the coating is essential for efficacy and the tablet must not be crushed or chewed
- 14-tablet pack provides a two-week course appropriate for initial treatment of erosive oesophagitis or symptom relief in symptomatic GERD, which is the standard assessment period before reviewing treatment response
How to Use
- Take as directed by your physician
- Swallow the tablet whole with water - do not crush, chew, or split
- Take 30 to 60 minutes before the first meal of the day for best effect
- Standard adult dose for GERD: 40mg once daily for 4 to 8 weeks
- Do not take for longer than prescribed without physician review
- If you cannot swallow the tablet, dissolve carefully in a glass of water without crushing - swallow the dispersed granules immediately
- Consult physician before stopping treatment - abrupt discontinuation after prolonged PPI use can cause rebound acid secretion
