Nexium vs. Omeprazole
See how Nexium and Omeprazole compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Nexium and omeprazole are both proton pump inhibitors that treat GERD, heartburn, and ulcers by lowering stomach acid production.
Nexium is the active isomer of omeprazole, and the two drugs share overlapping side effects and similar effectiveness for most patients.
Generic omeprazole costs a fraction of brand-name Nexium, making it the more budget-friendly starting point for most people with GERD.
Nexium vs. Omeprazole Drug Summary
Nexium
Nexium (esomeprazole) is a proton pump inhibitor used to treat GERD, heal erosive esophagitis, and reduce ulcer risk from long-term NSAID use. It comes as a delayed-release capsule, an oral suspension, or an IV injection, and is usually taken once a day before eating.
Omeprazole
Omeprazole (Prilosec) is a proton pump inhibitor used to treat GERD, heartburn, and stomach or duodenal ulcers, including ulcers caused by H. pylori infection. It comes as a delayed-release capsule or oral suspension, and is typically taken once a day before a meal.
Nexium vs. Omeprazole Side Effects
Nexium
Omeprazole
Nexium vs. Omeprazole Dosage
Nexium
Omeprazole
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 20 mg or 40 mg IV daily | If needed |
| Dose changes | 3 increases | As tolerated |
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 40 mg once daily | If needed |
| Dose changes | 1 increase | As tolerated |
Nexium
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 20 mg or 40 mg IV daily | If needed |
| Dose changes | 3 increases | As tolerated |
Omeprazole
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 40 mg once daily | If needed |
| Dose changes | 1 increase | As tolerated |
Nexium vs. Omeprazole Indications
Nexium
Nexium is FDA-approved to heal erosive esophagitis, treat short-term heartburn from GERD, and lower the risk of stomach ulcers caused by long-term NSAID use. It is also combined with antibiotics to eradicate H. pylori infection and used for rare acid-overproduction disorders like Zollinger-Ellison syndrome.
Healing and maintenance of erosive esophagitis
Short-term treatment of heartburn from GERD
Risk reduction of NSAID-related stomach ulcers
H. pylori eradication (with antibiotics)
Zollinger-Ellison syndrome and other hypersecretory conditions
Omeprazole
Omeprazole treats active duodenal and gastric ulcers, heals erosive esophagitis, and relieves heartburn from GERD. It is also combined with antibiotics to eradicate H. pylori and used for rare conditions that cause excess stomach acid, such as Zollinger-Ellison syndrome.
Treatment of active duodenal and gastric ulcers
Healing and maintenance of erosive esophagitis
Short-term treatment of GERD and heartburn
H. pylori eradication (with antibiotics)
Zollinger-Ellison syndrome and other hypersecretory conditions
Nexium vs. Omeprazole Pros and Cons
Nexium
Nexium offers an IV option for patients who cannot take oral medication and covers infants as young as 1 month for erosive esophagitis. As a brand-name drug, it typically costs more out of pocket than generic omeprazole, even though both work through the same acid-blocking mechanism.
Pros
Available as an IV injection for patients who cannot swallow pills
FDA-approved for infants as young as 1 month with erosive esophagitis
Available in both prescription and OTC strengths
Cons
Costs roughly $160 to $280 per month without insurance
Not approved for symptomatic GERD in infants under 1 year
No FDA-approved use for active duodenal or gastric ulcers
Omeprazole
Omeprazole has been available as a generic for decades, making it one of the most affordable PPIs on the market. It covers active duodenal and gastric ulcers, which Nexium's label does not, though it is not approved for infants under 1 year of age.
Pros
Generic version costs roughly $5 to $25 per month
FDA-approved for treating active duodenal and gastric ulcers
Approved for pediatric GERD treatment down to 1 year of age
Cons
No IV formulation for patients unable to take oral medication
Not approved for infants under 1 year of age
Requires twice-daily dosing for H. pylori triple therapy, unlike Nexium's once-daily regimen
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