Famotidine vs. Zantac 360

See how Famotidine and Zantac 360 compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Famotidine and Zantac 360 both contain the same active ingredient, so they work identically in the body.

  • Prescription famotidine treats ulcers, GERD, and erosive esophagitis, while Zantac 360 is sold over-the-counter only for occasional heartburn.

  • Zantac 360 costs less and needs no prescription, but it cannot treat the tissue damage that prescription-strength famotidine can.

Famotidine vs. Zantac 360 Drug Summary

Famotidine

Famotidine is an H2-receptor blocker prescribed for duodenal and gastric ulcers, GERD, erosive esophagitis, and rare acid-overproduction conditions like Zollinger-Ellison syndrome. It comes as a tablet, oral suspension, or IV injection, with doses from 20 mg to 40 mg depending on the condition being treated.

Zantac 360

Zantac 360 is the over-the-counter version of famotidine, an H2 blocker sold only to relieve or prevent occasional heartburn from acid indigestion. It comes as a film-coated tablet taken as needed at 10 mg or 20 mg, without a prescription.

Famotidine vs. Zantac 360 Side Effects

Famotidine

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

Zantac 360

Most common
Headache (frequency not specified on OTC label)
Dizziness (frequency not specified on OTC label)
Constipation (frequency not specified on OTC label)
Diarrhea (frequency not specified on OTC label)

Famotidine vs. Zantac 360 Dosage

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

Zantac 360

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 10 mg as needed At the start
Maximum dose 20 mg as needed If needed
Dose changes 1 increase As tolerated

Famotidine vs. Zantac 360 Indications

Famotidine

Famotidine is FDA-approved for a range of acid-related conditions beyond simple heartburn, including duodenal and gastric ulcers and erosive esophagitis caused by GERD. It is also used for rare conditions that cause excess stomach acid, such as Zollinger-Ellison syndrome.

  • Duodenal ulcer treatment and maintenance

  • Benign gastric ulcer treatment

  • GERD treatment

  • Erosive esophagitis due to GERD

Zantac 360

Zantac 360 is FDA-approved only for occasional heartburn caused by acid indigestion or sour stomach. It is meant for short-term relief or prevention before trigger foods, not for diagnosed conditions like ulcers or esophagitis.

  • Relieves heartburn from acid indigestion

  • Prevents heartburn before trigger foods or drinks

  • Not intended for diagnosed GI conditions

  • Not for children under 12 without a doctor

Famotidine vs. Zantac 360 Pros and Cons

Famotidine

Prescription famotidine treats a broader range of confirmed GI conditions, including ulcers and erosive esophagitis, and comes in higher doses and IV form for hospital use. Coverage and price vary widely depending on insurance and the strength prescribed.

Pros

  • Treats erosive esophagitis and ulcers, not just symptoms

  • Approved for rare hypersecretory conditions like Zollinger-Ellison syndrome

  • Available in higher doses (up to 40 mg) and IV form for severe cases

  • Often covered by insurance at low copays as a generic

Cons

  • Requires a doctor visit and prescription for stronger doses

  • Needs dose adjustment in moderate to severe kidney impairment

  • Costs roughly $10 to $90 a month out of pocket, depending on dose and coverage

  • Carries a warning about confusion or hallucinations in elderly patients

Zantac 360

Zantac 360 offers the same active ingredient as prescription famotidine but only for occasional heartburn, sold without a doctor visit. It is meant for short-term use and does not treat structural GI damage.

Pros

  • Available without a prescription at pharmacies and grocery stores

  • Simple as-needed dosing at 10 mg or 20 mg

  • Costs roughly $8 to $15 a month out of pocket, before any coupons

  • No doctor visit needed for occasional symptom relief

Cons

  • Not approved for ulcers, erosive esophagitis, or Zollinger-Ellison syndrome

  • Label instructs stopping use if symptoms last more than 14 days

  • Not intended for children under 12 without a doctor's guidance

  • Offers no clinical advantage over other OTC famotidine products like Pepcid AC

Common Symptoms and Related Diseases You Can Explore

Explore a range of common symptoms the Doctronic Symptom Checker can help you understand.