Pepcid vs. Aciphex

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

Key Takeaways

  • Pepcid is an H2 blocker that lowers stomach acid quickly and is available over the counter, while Aciphex is a prescription-only proton pump inhibitor that suppresses acid more completely.

  • Aciphex generally requires only once-daily dosing for most uses, while Pepcid is often dosed twice a day for active ulcers, GERD, and esophagitis.

  • Both drugs treat ulcers and GERD, but Aciphex is also FDA-approved for H. pylori eradication and Zollinger-Ellison syndrome at higher doses.

Pepcid vs. Aciphex Drug Summary

Pepcid

Pepcid (famotidine) is an H2 receptor blocker that reduces stomach acid to treat active ulcers, GERD, and erosive esophagitis. It is taken as a tablet, once or twice daily depending on the condition, and lower-dose versions are also sold over the counter for occasional heartburn.

Aciphex

Aciphex (rabeprazole) is a proton pump inhibitor that blocks acid production at the source to heal erosive GERD, duodenal ulcers, and hypersecretory conditions like Zollinger-Ellison syndrome. It is taken as a delayed-release tablet, usually once daily, with higher or split doses used for severe acid conditions.

Pepcid vs. Aciphex 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%)

Aciphex

Most common
Headache (up to 9.9%)
Pain (up to 3%)
Pharyngitis (up to 3%)
Flatulence (up to 3%)

Pepcid vs. Aciphex 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

Aciphex

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 20 mg once daily At the start
Maximum dose 60 mg twice daily If needed
Dose changes 3 increases As tolerated

Pepcid vs. Aciphex Indications

Pepcid

Pepcid is FDA-approved for active duodenal and gastric ulcers, symptomatic non-erosive GERD, and erosive esophagitis confirmed by biopsy. It is also used to reduce the risk of duodenal ulcer recurrence and for pathological hypersecretory conditions like Zollinger-Ellison syndrome.

  • Active duodenal ulcer

  • Active gastric ulcer

  • Symptomatic non-erosive GERD

  • Erosive esophagitis due to GERD

  • Pathological hypersecretory conditions

Aciphex

Aciphex is FDA-approved for healing erosive or ulcerative GERD, maintaining that healing, and treating symptomatic GERD in adults and adolescents 12 and older. It is also used for duodenal ulcer healing, H. pylori eradication with antibiotics, and hypersecretory conditions like Zollinger-Ellison syndrome.

  • Healing of erosive or ulcerative GERD

  • Maintenance of GERD healing

  • Symptomatic GERD in adults and teens 12+

  • Duodenal ulcer healing

  • H. pylori eradication with antibiotics

Pepcid vs. Aciphex Pros and Cons

Pepcid

Pepcid works quickly and has a long safety record since its 1986 approval, with a lower-dose version available without a prescription. As an H2 blocker it suppresses acid less completely than a PPI, which can matter for severe erosive disease.

Pros

  • Available over the counter at lower doses

  • Can be used as needed for quick symptom relief

  • Lower risk of long-term bone fracture linked to PPIs

  • Roughly $10 to $100 per month without insurance

Cons

  • Often dosed twice daily for active disease

  • Less potent acid suppression than a PPI

  • Not indicated for H. pylori eradication

  • Effectiveness can lessen with continuous long-term use

Aciphex

Aciphex offers stronger, more sustained acid suppression and simpler once-daily dosing for most uses, plus a specific dose path for Zollinger-Ellison syndrome up to 100 mg a day. As a PPI it carries its own long-term risks and a much higher price tag.

Pros

  • Once-daily dosing for most approved uses

  • Stronger acid suppression for healing erosive GERD

  • Approved combination therapy for H. pylori

  • Specifically labeled for Zollinger-Ellison syndrome

Cons

  • Roughly $658 to $1,536 per month without insurance

  • Not approved for GERD treatment under age 12

  • Long-term or high-dose use raises bone fracture risk

  • Carries PPI risks like C. difficile diarrhea and kidney inflammation

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