Nexium vs. Famotidine

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

Key Takeaways

  • Nexium is a proton pump inhibitor that blocks acid production more completely than famotidine, an H2 blocker.

  • Famotidine works faster for occasional heartburn, while Nexium is better suited for healing erosive esophagitis and long-term acid control.

  • Both drugs come in prescription and over-the-counter strengths, but they differ in potency, onset, and long-term risk profile.

Nexium vs. Famotidine Drug Summary

Nexium

Nexium (esomeprazole) is a proton pump inhibitor that reduces stomach acid production by blocking the enzyme that makes it. It treats erosive esophagitis, GERD-related heartburn, and stomach ulcers, and is taken as a once-daily capsule before eating.

Famotidine

Famotidine is an H2 blocker that reduces acid production by blocking histamine signals in the stomach. It treats GERD, duodenal and gastric ulcers, and heartburn, and is taken as a tablet once or twice daily.

Nexium vs. Famotidine Side Effects

Nexium

Most common
headache (up to 5.5%)
diarrhea (up to 4%)
abdominal pain (up to 4%)
nausea (>1%)

Famotidine

Most common
headache (≥1%)
diarrhea (<1%)
dizziness (≥1%)
constipation (≥1%)

Nexium vs. Famotidine Dosage

Nexium

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 20 mg once daily Weeks 1-4
Maximum dose 20-40 mg IV 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

Nexium vs. Famotidine Indications

Nexium

Nexium is FDA-approved to heal and maintain healing of erosive esophagitis, treat short-term GERD symptoms, and reduce the risk of NSAID-related stomach ulcers. It is also used with antibiotics to eradicate H. pylori and to manage rare acid-overproduction disorders like Zollinger-Ellison syndrome.

  • Healing of erosive esophagitis

  • Maintenance of erosive esophagitis healing

  • Short-term treatment of GERD and heartburn

  • Risk reduction of NSAID-associated ulcers

  • H. pylori eradication (with antibiotics)

Famotidine

Famotidine is FDA-approved to treat duodenal and gastric ulcers, GERD, and erosive esophagitis, and to manage rare acid-overproduction disorders. It is also used off-label for stress ulcer prevention in critically ill patients and for chronic urticaria.

  • Treatment of duodenal ulcer

  • Maintenance therapy for duodenal ulcer

  • Treatment of gastric ulcer and GERD

  • Treatment of erosive esophagitis due to GERD

  • Off-label: stress ulcer prophylaxis and chronic urticaria

Nexium vs. Famotidine Pros and Cons

Nexium

Nexium provides stronger, more sustained acid suppression than famotidine, making it the preferred option for healing erosive esophagitis and long-term GERD control. It usually requires only once-daily dosing, but extended use carries risks like bone fracture and low magnesium that famotidine does not share.

Pros

  • More potent, longer-lasting acid suppression

  • FDA-approved for healing erosive esophagitis

  • Available as an IV option for hospitalized patients

  • Used with antibiotics for H. pylori eradication

Cons

  • Slower symptom relief (hours, not minutes)

  • Long-term use linked to bone fracture risk

  • Higher list price, roughly $160 to $280 a month before savings programs

  • Not approved for GERD symptoms alone in infants under 1 year

Famotidine

Famotidine works within about an hour, making it useful for quick symptom relief, but it generally produces less complete acid suppression than Nexium for severe esophagitis. It has a long safety record with no boxed warning, though people with kidney problems need lower doses.

Pros

  • Faster onset of action, often within an hour

  • Lower list price, roughly $10 to $90 a month before savings programs

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

  • Long track record dating back to its 1986 approval

Cons

  • Less complete acid suppression than a PPI

  • Requires dose adjustment in kidney impairment

  • Risk of confusion or hallucinations in elderly or renal patients

  • Shorter duration often means more frequent dosing

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