Omeprazole Long Term: Is It Safe, What Are the Risks and How to Stop
Written by Naurah Gaspard, DNP, FNP-C, FNP-BC · Medically reviewed by Cherlie Joseph, MSN, FNP-BC · Updated November 2026
For many people with a clear reason, such as severe erosive esophagitis or Barrett’s esophagus, long-term omeprazole is reasonable and the benefits outweigh the risks. For others, the goal is the lowest dose that controls symptoms, or stopping. Do not stop suddenly on your own if you have taken it for months; rebound heartburn is common, and a plan helps.
In this guide
Who actually needs omeprazole long term
Omeprazole is a proton pump inhibitor (PPI). It lowers stomach acid and helps the esophagus heal. The American Gastroenterological Association (AGA) says long-term use is generally appropriate for people with:
- Severe erosive esophagitis
- Barrett’s esophagus
- A history of bleeding ulcers, or high bleeding risk while taking NSAIDs or blood thinners
- GERD symptoms that come right back whenever the PPI is stopped
If you started omeprazole for a short-term problem and never stopped, or you are not sure why you take it, it is worth a review.
The 14-day OTC limit
Over-the-counter omeprazole (such as Prilosec OTC) is labeled for frequent heartburn: one 14-day course, no more often than every 4 months, unless a provider tells you otherwise. It can take 1 to 4 days to reach full effect, so it is not meant for instant relief. Needing it longer or more often is a signal to be evaluated, not a reason to keep repeating courses on your own.
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Request a medication refill →Risks listed in FDA labeling
Most people tolerate omeprazole well. These are the longer-term risks described in prescribing information and FDA safety communications. Many come from observational studies, which show an association rather than proof that the PPI caused the problem.
| Possible risk | What to know |
|---|---|
| Low magnesium | More likely after a year or more, or with diuretics; can cause cramps, tremor or abnormal heart rhythm |
| Low vitamin B12 | Reported with long-term use, usually 3 years or more |
| Bone fractures | Higher risk with high doses or use for a year or more |
| C. difficile diarrhea | Watery diarrhea that will not stop needs prompt care |
| Kidney inflammation (acute interstitial nephritis) | Uncommon; can occur any time |
| Fundic gland polyps | Usually harmless stomach polyps seen with use over a year |
Your provider may check magnesium or B12 levels if you have been on omeprazole for a long time or have symptoms.
How to safely stop or step down
Stopping a PPI suddenly after months of use can cause rebound acid, where heartburn temporarily gets worse than before. That does not mean you still need the medicine. The AGA suggests tapering for people who have used a PPI longer than about 8 weeks. Common approaches a provider may recommend include:
- Reducing from twice daily to once daily
- Lowering the dose or taking it every other day before stopping
- Switching to on-demand use when symptoms flare
- Using an antacid or H2 blocker such as famotidine to get through rebound symptoms
Keep up the habits that reduce reflux: smaller meals, no food 2 to 3 hours before bed and head-of-bed elevation. If symptoms come back strongly after a careful taper, you may be someone who benefits from staying on it.
Do not stop just because you are worried
The AGA advises against stopping a PPI only out of fear of side effects when there is a clear reason to take it. For someone with Barrett’s esophagus or a history of bleeding ulcers, stopping can be riskier than continuing. The right answer depends on why you take it, how long and at what dose, which is exactly what a medication review is for.
Get in-person care or call 911 if you have:
- Black, tarry stools or vomiting blood
- Trouble swallowing or food getting stuck
- Severe or ongoing watery diarrhea, especially with fever or belly pain
- Fainting, very irregular heartbeat or severe muscle spasms
- Chest pain, which should never be assumed to be heartburn
Frequently asked questions
Is it okay to take omeprazole every day for years?
For people with a clear medical reason, yes, under a provider’s care and at the lowest effective dose. If you have no ongoing reason, a provider may help you taper off.
What happens when you stop taking omeprazole?
Many people get rebound heartburn for a few days to a few weeks after stopping, because the stomach temporarily makes extra acid. Tapering and short-term use of antacids or famotidine can help.
Does omeprazole cause dementia?
Some observational studies raised this question, but others have not confirmed it, and no cause-and-effect link has been shown. Do not stop a needed medicine because of it; talk with your provider about your own risks and benefits.
Sources
- AGA Clinical Practice Update on De-Prescribing of Proton Pump Inhibitors (Gastroenterology, 2022)
- MedlinePlus: Omeprazole
- ACG Clinical Guideline for the Diagnosis and Management of GERD (Katz et al., 2022)
Keep reading
- Omeprazole vs pantoprazole
- Vitamin B12 test explained
- Magnesium test explained
- GERD diet: foods to avoid and foods that help
- Browse all conditions and treatments A to Z
Need a refill for your omeprazole?
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Naurah Gaspard, DNP, FNP-C, FNP-BC
Board-certified family nurse practitioner licensed in Florida, New Mexico, Oregon and Washington, caring for adults online at OurTopClinic. Meet our providers.
This article is for general education and is not a substitute for medical advice. Treatment, including any prescription, is decided by a licensed provider after reviewing your health history. OurTopClinic is not for emergencies; if you have a medical emergency, call 911. OurTopClinic serves adults located in Florida, New Mexico, Oregon and Washington. Learn more at ourtopclinic.com.
