Prilosec vs. Zantac 360
See how Prilosec and Zantac 360 compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Prilosec is a proton pump inhibitor that treats and heals underlying conditions like ulcers and erosive esophagitis, while Zantac 360 is an H2 blocker that only relieves occasional heartburn symptoms.
Zantac 360 can start working within about an hour, but Prilosec can take one to four days to reach full effect because it works by blocking acid production over time.
Prilosec requires a prescription for its full range of doses and uses, while Zantac 360 is available over the counter for short-term, as-needed relief.
Prilosec vs. Zantac 360 Drug Summary
Prilosec
Prilosec (omeprazole) is a proton pump inhibitor used to treat ulcers, erosive esophagitis, GERD, and rare acid hypersecretion disorders. It comes as a delayed-release capsule, tablet, or oral suspension, typically taken once or twice daily depending on the condition being treated.
Zantac 360
Zantac 360 (famotidine) is an over-the-counter H2 receptor antagonist used to relieve and prevent occasional heartburn from acid indigestion or sour stomach. It comes as a film-coated tablet taken as needed, with adults typically choosing between a 10 mg dose for mild symptoms or a 20 mg dose for stronger relief.
Prilosec vs. Zantac 360 Side Effects
Prilosec
Zantac 360
Prilosec vs. Zantac 360 Dosage
Prilosec
Zantac 360
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 120 mg three times daily | If needed |
| Dose changes | 4 increases | As tolerated |
| 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 |
Prilosec
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 120 mg three times daily | If needed |
| Dose changes | 4 increases | As tolerated |
Zantac 360
| 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 |
Prilosec vs. Zantac 360 Indications
Prilosec
Prilosec is FDA-approved to treat duodenal and gastric ulcers, erosive esophagitis caused by GERD, and to maintain healing after erosive esophagitis clears. It's also used in combination therapy to eradicate H. pylori infection and to manage rare acid hypersecretion disorders like Zollinger-Ellison syndrome. Off-label, it's sometimes used for stress ulcer prevention in critically ill patients.
Duodenal and gastric ulcer treatment
Erosive esophagitis from GERD
Maintenance of healed erosive esophagitis
H. pylori eradication (combination therapy)
Zantac 360
Zantac 360 is FDA-approved to relieve heartburn from acid indigestion and sour stomach, and to prevent it when taken before trigger foods or drinks. It's intended for short-term, occasional use rather than chronic acid-related conditions requiring ongoing treatment. It isn't approved for children under 12 without a doctor's guidance.
Relief of heartburn from acid indigestion
Relief of sour stomach
Prevention of heartburn before trigger foods or drinks
Short-term, as-needed symptom control
Prilosec vs. Zantac 360 Pros and Cons
Prilosec
Prilosec treats the underlying cause of acid-related damage, including ulcers and erosive esophagitis, rather than just masking symptoms. It requires consistent daily dosing to reach full effect and is available both by prescription and over the counter as Prilosec OTC.
Pros
Treats underlying causes like ulcers and erosive esophagitis, not just symptoms
Available in capsule, tablet, and oral suspension, plus an OTC option
Used as part of H. pylori eradication therapy
Approved for rare acid hypersecretion disorders like Zollinger-Ellison syndrome
Cons
Not for immediate heartburn relief; can take 1 to 4 days for full effect
Long-term use linked to higher risk of bone fracture and C. diff infection
Higher doses and specialized regimens require a prescription
Roughly $15 to $95 per month without insurance, more than Zantac 360
Zantac 360
Zantac 360 works quickly to ease occasional heartburn but doesn't treat or heal underlying tissue damage the way a PPI does. It's sold over the counter for short-term use and isn't meant to replace prescription treatment for chronic acid conditions.
Pros
Works within about an hour for occasional heartburn relief
Available over the counter without a prescription
Simple as-needed dosing, with no titration schedule
Roughly $8 to $15 per month, less than Prilosec
Cons
Only relieves symptoms; does not treat ulcers or heal esophagitis
Not intended for symptoms lasting more than 14 days
Not recommended for children under 12 without medical guidance
May be less effective for severe or chronic acid-related conditions
Common Symptoms and Related Diseases You Can Explore
Explore a range of common symptoms the Doctronic Symptom Checker can help you understand.