dexlansoprazole vs omeprazole
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of dexlansoprazole and omeprazole. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Dexilant
Prilosec
Dexlansoprazole (Dexilant) is a medicine that lowers stomach acid. It belongs to a class of drugs called proton pump inhibitors (PPIs).
Omeprazole (Prilosec) is a medicine that reduces the amount of acid in your stomach. It belongs to a class of drugs called proton pump inhibitors (PPIs).
This medicine can help heal damage to your esophagus (the tube connecting your mouth to your stomach). It can also help with heartburn caused by acid reflux. Dexlansoprazole can also treat heartburn from GERD, a condition where stomach acid flows back into your esophagus.
This medicine treats frequent heartburn, which is heartburn that occurs 2 or more days a week. It is not meant to give you immediate relief from heartburn. It may take 1 to 4 days for the medicine to fully work.
Dexlansoprazole works by reducing the amount of acid your stomach makes. It does this by blocking a specific system in your stomach cells. This helps to heal damage caused by stomach acid.
Omeprazole works by blocking the production of acid in your stomach. It does this by targeting the cells that make stomach acid. This helps to reduce heartburn symptoms.
- • Diarrhea
- • Abdominal pain
- • Nausea
- • Upper respiratory tract infection
- • Vomiting
- • Headache
- Chronic Kidney Disease 16,100
- Acute Kidney Injury 7,791
- Renal Failure 6,721
- End Stage Renal Disease 4,842
- Renal Injury 4,339
- Fatigue 19,901
- Nausea 19,842
- Diarrhoea 19,627
- Dyspnoea 16,336
- Headache 14,629
Dexlansoprazole may hide signs of stomach cancer, so tell your doctor if your symptoms don't improve. It can also cause kidney problems, severe diarrhea from a Clostridium difficile infection, and bone fractures with long-term use. Some people may have severe skin reactions or lupus. Long-term use may also lead to low vitamin B12 or magnesium levels.
Children under 18 should ask a doctor before use. Heartburn in children may be a sign of a serious condition.
Based on animal studies, this medicine may harm a developing baby's bones. Talk to your doctor if you are pregnant or plan to become pregnant.
Talk to your doctor if you are pregnant or breastfeeding before taking this medicine. It is important to weigh the benefits and risks with your doctor.
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How to Read This dexlansoprazole vs omeprazole Comparison
dexlansoprazole is classified in the Proton Pump Inhibitor (PPI) drug class, while omeprazole sits within the Proton Pump Inhibitor (PPI) class. Because both drugs share the same classification, they are often considered interchangeable in theory, but clinical outcomes rarely track that cleanly. Both drugs are split between OTC and prescription status, which affects access and supervision.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, dexlansoprazole has 39,793 submissions while omeprazole has 90,335. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for dexlansoprazole or omeprazole.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.