Prevacid vs. Pepcid
See how Prevacid and Pepcid compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Prevacid is a proton pump inhibitor that blocks acid production more completely than Pepcid, an H2 blocker, making it the stronger choice for healing erosive esophagitis and ulcers.
Pepcid starts easing symptoms within about an hour, while Prevacid can take one to four days to reach its full acid-suppressing effect.
Both drugs treat pathological hypersecretory conditions, but only Prevacid is FDA-approved for H. pylori eradication and lowering NSAID-related ulcer risk.
Prevacid vs. Pepcid Drug Summary
Prevacid
Prevacid (lansoprazole) is a proton pump inhibitor that reduces stomach acid production to treat ulcers, GERD, erosive esophagitis, and H. pylori infection. It comes as a delayed-release capsule, an orally disintegrating tablet, or an IV injection, and is usually taken once daily before a meal.
Pepcid
Pepcid (famotidine) is an H2 blocker that lowers stomach acid to treat ulcers, GERD, and erosive esophagitis, and to manage conditions that cause excess acid production. It comes as an oral tablet taken once or twice daily and starts working within about an hour, faster than a PPI.
Prevacid vs. Pepcid Side Effects
Prevacid
Pepcid
Prevacid vs. Pepcid Dosage
Prevacid
Pepcid
| STAGE | DOSE | WHEN |
| Starting dose | 15 mg once daily | At the start |
| Maximum dose | 60 mg once daily | If needed |
| Dose changes | 3 increases | As tolerated |
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 20-40 mg twice daily | If needed |
| Dose changes | 3 increases | As tolerated |
Prevacid
| STAGE | DOSE | WHEN |
| Starting dose | 15 mg once daily | At the start |
| Maximum dose | 60 mg once daily | If needed |
| Dose changes | 3 increases | As tolerated |
Pepcid
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 20-40 mg twice daily | If needed |
| Dose changes | 3 increases | As tolerated |
Prevacid vs. Pepcid Indications
Prevacid
Prevacid treats duodenal and gastric ulcers, erosive esophagitis, and GERD, and it is used with antibiotics to eradicate H. pylori infection. It also treats rare acid-hypersecretory disorders like Zollinger-Ellison syndrome and can lower the risk of NSAID-related stomach ulcers.
Duodenal and gastric ulcer healing
Erosive esophagitis and GERD
H. pylori eradication (triple therapy)
Zollinger-Ellison syndrome and hypersecretory conditions
Reduces risk of NSAID-associated gastric ulcers
Pepcid
Pepcid treats active duodenal and gastric ulcers, symptomatic non-erosive GERD, and erosive esophagitis confirmed by biopsy. It also treats pathological hypersecretory conditions such as Zollinger-Ellison syndrome and helps reduce the risk of duodenal ulcer recurrence.
Duodenal and gastric ulcer treatment
Non-erosive GERD symptom relief
Erosive esophagitis diagnosed by biopsy
Zollinger-Ellison syndrome and hypersecretory conditions
Reduces risk of duodenal ulcer recurrence
Prevacid vs. Pepcid Pros and Cons
Prevacid
Prevacid provides stronger, longer-lasting acid suppression than Pepcid, making it a common choice for healing erosive damage and ulcers. It is available over-the-counter and by prescription in capsule, dissolving tablet, and IV forms, but long-term daily use carries its own risks.
Pros
Stronger acid suppression, better for healing erosive damage
Available as capsule, dissolving tablet (SoluTab), or IV
FDA-approved for H. pylori eradication and NSAID-ulcer prevention
Available over-the-counter as well as by prescription
Cons
Long-term use linked to fracture risk and fundic gland polyps
Takes one to four days to reach full effect
Carries a Clostridioides difficile diarrhea warning
Not approved for infants under 1 year old
Pepcid
Pepcid works faster than Prevacid, easing symptoms within about an hour, which makes it useful for as-needed dosing. It does not carry the long-term bone or vitamin risks tied to PPIs, but it suppresses acid less completely and usually needs twice-daily dosing.
Pros
Starts working within about an hour
No long-term bone fracture or vitamin B12 warnings
Approved for children weighing 40 kg or more
Can be used on an as-needed basis for occasional symptoms
Cons
Less complete acid suppression than a PPI
Usually needs twice-daily dosing for ulcers and GERD
Can cause confusion or other CNS effects in elderly or kidney-impaired patients
Effectiveness may lessen with continuous long-term use
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