lansoprazole vs pantoprazole
Side-by-side comparison of lansoprazole and pantoprazole Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Prevacid
Protonix
Lansoprazole is a medicine that reduces the amount of acid in your stomach. It belongs to a class of drugs called proton pump inhibitors (PPIs).
Pantoprazole is a drug that reduces stomach acid. It belongs to a class of drugs called proton pump inhibitors (PPIs).
Lansoprazole can treat several conditions caused by too much stomach acid. It can heal duodenal and gastric ulcers. It also treats heartburn (GERD) and a damaged esophagus (erosive esophagitis).
This medicine treats gastroesophageal reflux disease (GERD) and erosive esophagitis (EE) in adults, for up to 10 days. GERD is when stomach acid flows back into your esophagus, causing heartburn. It also treats conditions where your stomach makes too much acid, like Zollinger-Ellison (ZE) Syndrome.
Lansoprazole works by blocking the enzyme in the stomach that produces acid. This helps to lower the amount of acid made. Lowering acid helps to heal damage and relieve symptoms.
Pantoprazole works by blocking the enzyme in the stomach that produces acid. This reduces the amount of acid your stomach makes. It helps to heal damage to the esophagus caused by acid reflux.
- • Diarrhea
- • Abdominal pain
- • Nausea
- • Constipation
- • Headache
- • Diarrhea
- • Nausea
- • Abdominal pain
- • Vomiting
- Long-term kidney disease 32,775
- Sudden kidney damage 18,670
- Kidney failure 13,811
- Kidney failure requiring dialysis 9,782
- Kidney damage 9,520
- Tiredness 19,880
- Using the medicine for a condition it is not approved for 17,588
- Feeling sick to your stomach 16,991
- Loose, watery stools 16,631
- Difficulty breathing 16,590
Lansoprazole may hide the symptoms of stomach cancer. If you have a poor response or early return of symptoms, your doctor may do more tests. Long-term use of PPIs like lansoprazole may increase your risk of bone fractures. It may also cause low magnesium levels or Vitamin B-12 deficiency.
Pantoprazole can hide the symptoms of stomach cancer, so tell your doctor if your symptoms don't improve. It may also increase your risk of diarrhea caused by a bacteria called *C. difficile*. Long-term use may increase your risk of bone fractures. This medicine may also cause kidney problems, lupus, low magnesium levels, and polyps in the stomach.
Talk to your doctor if you are pregnant or plan to become pregnant. Lansoprazole may affect bone development in the fetus. If you take lansoprazole with clarithromycin, also consider clarithromycin's pregnancy risks.
Based on animal studies, this medicine may harm your unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
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How to Read This lansoprazole vs pantoprazole Comparison
lansoprazole is classified in the Proton Pump Inhibitor (PPI) drug class, while pantoprazole 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, lansoprazole has 84,558 submissions while pantoprazole has 87,680. 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 substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between lansoprazole and pantoprazole — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.