Pepcid vs. Famotidine

See how Pepcid and Famotidine compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Pepcid is the brand name for famotidine, so both contain the exact same active ingredient and work the same way in the body.

  • Both reduce stomach acid by blocking H2 receptors, and FDA data show similar rates of headache, diarrhea, dizziness, and constipation.

  • The main practical differences are manufacturer, appearance, and availability rather than effectiveness, since generic famotidine works identically to Pepcid.

Pepcid vs. Famotidine Drug Summary

Pepcid

Pepcid is a brand-name histamine H2-receptor antagonist that lowers stomach acid to treat GERD, ulcers, and erosive esophagitis. It comes as tablets, an oral suspension, and an IV injection, dosed once or twice daily depending on the condition being treated.

Famotidine

Famotidine is the generic version of Pepcid, reducing stomach acid through the same H2-blocking mechanism for GERD, ulcers, and esophagitis. It's available as tablets, oral suspension, and injection, and it's also sold over the counter for occasional heartburn.

Pepcid vs. Famotidine Side Effects

Pepcid

Most common
Headache (up to 4.7%)
Diarrhea (up to 1.7%)
Dizziness (up to 1.3%)
Constipation (up to 1.2%)

Famotidine

Most common
Headache (≥1%)
Diarrhea (<1%)
Dizziness (≥1%)
Constipation (≥1%)

Pepcid vs. Famotidine Dosage

Pepcid

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 40 mg once daily At the start
Maximum dose 20 mg once daily If needed
Dose changes 3 increases As tolerated

Famotidine

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 20 mg once daily At the start
Maximum dose 20 mg every 6 hours If needed
Dose changes 3 increases As tolerated

Pepcid vs. Famotidine Indications

Pepcid

Pepcid is FDA-approved to treat and prevent duodenal and gastric ulcers, GERD, and erosive esophagitis. It's also used for hypersecretory conditions like Zollinger-Ellison syndrome. Some doctors prescribe it off-label to prevent stress ulcers in critically ill patients.

  • Duodenal ulcer treatment and maintenance

  • Gastric ulcer treatment

  • GERD and erosive esophagitis

  • Hypersecretory conditions (e.g., Zollinger-Ellison syndrome)

  • Off-label: stress ulcer prevention in the ICU

Famotidine

Famotidine carries the same FDA approvals as Pepcid, covering duodenal and gastric ulcers, GERD, erosive esophagitis, and hypersecretory conditions. It's sold both by prescription and over the counter for occasional heartburn. Off-label, it's sometimes used for stress ulcer prevention or chronic hives.

  • Duodenal ulcer treatment and maintenance

  • Gastric ulcer treatment

  • GERD and erosive esophagitis

  • Hypersecretory conditions (e.g., Zollinger-Ellison syndrome)

  • Off-label: stress ulcer prevention and chronic urticaria

Pepcid vs. Famotidine Pros and Cons

Pepcid

Pepcid contains the same active ingredient as generic famotidine and works identically in the body. Because it comes from a single manufacturer, its appearance and formulation stay consistent from refill to refill.

Pros

  • Made by a single manufacturer, so pill appearance stays consistent

  • Long-standing brand recognized by doctors and pharmacists

  • No boxed warning, unlike some other acid-reducing drug classes

  • Available in prescription-strength IV form for hospital use

Cons

  • Offers no clinical advantage over generic famotidine

  • Only available under one brand name, limiting manufacturer choice

  • Prescription-strength doses require a doctor's visit

Famotidine

Famotidine is the generic form of Pepcid, delivering the same acid-reducing effect through the same mechanism. Because multiple manufacturers produce it, pharmacies typically stock several store-brand versions alongside it.

Pros

  • Sold by multiple manufacturers, giving pharmacies more supply options

  • Available over the counter in lower-dose tablets for occasional heartburn

  • Same FDA-approved efficacy and safety as the brand-name version

  • Widely stocked as a store-brand option at most pharmacies

Cons

  • Pill shape, color, and inactive ingredients vary by manufacturer

  • Less brand recognition may cause confusion when switching manufacturers

  • OTC version only treats occasional heartburn, not ulcers or GERD long-term

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