A 24-year-old male asked:
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how long it takes zantac (ranitidine) to work for gastritis?

3 doctor answers
Dr. Michael Jones
A Verified Doctor answered
A US doctor answered Learn more
1 hour : Or less if it's gonna work.
Answered on Sep 28, 2016
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Dr. Charles Cattano
38 years experience Gastroenterology
Zantac (ranitidine) dosedependent: Zantac (ranitidine) in doses less than 100mg (otc dosing is 75mg) effectively inhibits basal and nighttime acid output by the stomach. However, food-stimulated acid production is more difficult to suppress and needs bigger doses. Prescription-strength doses of Zantac (ranitidine) are 150-300mg twice daily. So, if a little Zantac (ranitidine) doesn't "work for gastritis" symptoms, ask your doctor to up the dose or switch medication.
Answered on Aug 25, 2018
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Dr. Gregg Albers
40 years experience Addiction Medicine
Depends: Depends on the source and severity of the gastritis. Chronic damage from alcohol use will cause more severe damage that may or may not get better with zantac (ranitidine). Those with gastritis and ulcers will need stronger medication for days to weeks to get rid of the symptoms. Mild gastritis due to increased acid may be improved in a shorter period of time with zantac (ranitidine), 1-2 hours likely.
Answered on Jan 5, 2018
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Related questions:

A 18-year-old female asked:
Dr. Laura Anissian
20 years experience Internal Medicine
May take longer: I would give it a week to work, if not, then you may need a different medication. Was this rec by your doctor?
A 21-year-old male asked:
Dr. Howard Brown
25 years experience Gastroenterology
Antral gastritis : Depending on the PPI medication orH2 blocker used (such as zantac) it may take as much as 4 to 6 weeks. Be patient for a little while
2
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A 32-year-old female asked:
Dr. Charles Cattano
38 years experience Gastroenterology
Time for a change...: Zantac (ranitidine) in doses less than 100mg (otc dosing is 75mg) effectively inhibits basal & nighttime acid output by the stomach. However, food-sti ... Read More
2
2 thanks
A female asked:
Dr. George Valdez
Specializes in Family Medicine
More info: it depends on what caused the gastritis. did your doctor check for h pylori infection, or do endoscopy? Usually over-the-counter Nexium (esomeprazole) ... Read More

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