Aciphex vs. Famotidine

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

Key Takeaways

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

  • Famotidine works faster for occasional heartburn, while Aciphex provides longer healing for erosive GERD and ulcers.

  • Famotidine costs far less and is available over the counter, while Aciphex requires a prescription and costs significantly more.

Aciphex vs. Famotidine Drug Summary

Aciphex

Aciphex (rabeprazole) is a proton pump inhibitor that reduces stomach acid production to treat GERD, ulcers, and hypersecretory conditions like Zollinger-Ellison syndrome. It comes as a delayed-release tablet taken once daily, with higher doses used for severe acid conditions. It is also used with antibiotics to eradicate H. pylori infection.

Famotidine

Famotidine is an H2-receptor antagonist that lowers stomach acid to treat ulcers, GERD, and erosive esophagitis. It is taken as a tablet or liquid, usually once or twice daily, and is available both by prescription and over the counter. It also treats hypersecretory conditions like Zollinger-Ellison syndrome.

Aciphex vs. Famotidine Side Effects

Aciphex

Most common
headache (up to 9.9%)
constipation (up to 2%)
pain (up to 3%)
pharyngitis (up to 3%)

Famotidine

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

Aciphex vs. Famotidine Dosage

Aciphex

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 20 mg once daily At the start
Maximum dose 20 mg once daily Same as starting
Dose changes None Fixed dose

Famotidine

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 20 mg twice daily Weeks 1-6
Maximum dose 40 mg once daily Weeks 1-8
Dose changes 1 increase As tolerated

Aciphex vs. Famotidine Indications

Aciphex

Aciphex treats acid-related conditions including erosive GERD, duodenal ulcers, and Zollinger-Ellison syndrome. It also helps heal ulcers caused by H. pylori infection when combined with antibiotics. Rabeprazole is approved for adults and adolescents 12 and older, but not for younger children.

  • Healing of erosive or ulcerative GERD

  • Maintenance of GERD healing

  • Duodenal ulcer healing

  • H. pylori eradication with antibiotics

  • Zollinger-Ellison syndrome

Famotidine

Famotidine treats duodenal and gastric ulcers, GERD, and erosive esophagitis, and helps manage hypersecretory conditions like Zollinger-Ellison syndrome. It is also used off-label for stress ulcer prevention in critically ill patients and for chronic hives unresponsive to other treatments. Famotidine is approved for both short-term treatment and longer maintenance therapy.

  • Duodenal ulcer treatment and maintenance

  • Benign gastric ulcer treatment

  • GERD and erosive esophagitis treatment

  • Zollinger-Ellison syndrome

  • Off-label stress ulcer prevention in ICU (off-label)

Aciphex vs. Famotidine Pros and Cons

Aciphex

Aciphex offers potent, long-lasting acid suppression and is one of the few PPIs specifically labeled for Zollinger-Ellison syndrome at doses up to 100 mg daily. It requires a prescription and typically costs far more than over-the-counter options like famotidine.

Pros

  • Specifically FDA-approved for Zollinger-Ellison syndrome up to 100 mg/day

  • Also approved for H. pylori eradication when combined with antibiotics

  • Once-daily dosing covers most approved uses

  • Long-standing safety record since FDA approval in 1999

Cons

  • Only available by prescription, with no OTC option

  • Typically costs $658 to $1,536 per month without insurance

  • Only sold as a single 20 mg tablet strength

  • Contraindicated with rilpivirine-containing HIV medications

Famotidine

Famotidine offers effective acid reduction with a strong safety record and no boxed warning, and it comes in prescription and OTC strengths for flexible use. It works faster for occasional symptoms but generally provides less complete acid suppression than a PPI like Aciphex.

Pros

  • Available over the counter as well as by prescription

  • Much lower typical cost, roughly $10 to $90 per month

  • Comes in tablet, liquid, and injectable forms for flexible use

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

Cons

  • Requires dose adjustment in moderate to severe kidney impairment

  • Can cause confusion or hallucinations in elderly or kidney-impaired patients

  • Provides less complete acid suppression than a PPI for severe erosive GERD

  • May need dosing as often as every 6 hours for some conditions

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