Reviewed by the Help Dementia Editorial Team — our editors review every article for accuracy against guidance from the National Institute on Aging, the Alzheimer’s Association, and peer-reviewed sources.
Mayo clinic sits at the center of this dementia and brain health question.
Recent research has revealed a concerning connection between common heartburn medications and dementia risk that millions of people taking these drugs need to understand. A landmark study from Mayo Clinic researchers published in August 2023 found that people taking proton pump inhibitors (PPIs)—the most popular class of heartburn medications—for more than 4.4 years had a 33 percent higher risk of developing dementia compared to those who never took these medications. While an earlier 2019 study found an even higher association of 44 percent increased risk, the larger and more rigorous 2023 research provides important confirmation that long-term use of these widely prescribed drugs warrants serious consideration. Consider the case of someone like Robert, a 65-year-old who has been taking Prilosec daily for acid reflux for the past seven years.
He’s among millions of Americans who rely on these medications for relief from heartburn and acid reflux symptoms. Yet he may not realize that his extended use of this medication puts him at a measurably higher risk for cognitive decline later in life—a risk that medical professionals are only now systematically studying and trying to understand. The implications are significant because PPIs are among the most commonly prescribed medications in America, with millions of people taking them for conditions ranging from simple heartburn to more serious acid reflux disease. Understanding what this research means for your health and what steps you can take is essential for making informed decisions about your long-term healthcare.
Table of Contents
- What Are Proton Pump Inhibitors and Why Are They So Widely Used?
- The Research Findings: What Does 33 Percent Higher Risk Actually Mean?
- How Might PPIs Affect Brain Health?
- Should You Stop Taking Your Heartburn Medication?
- The Complication of Long-Term Use and Age Considerations
- Other Medications and Brain Health: A Broader Perspective
- The Future of Research and What Patients Should Watch For
- Conclusion
- Frequently Asked Questions
What Are Proton Pump Inhibitors and Why Are They So Widely Used?
Proton pump inhibitors work by reducing the amount of acid your stomach produces, providing relief from heartburn, acid reflux, and gastrointestinal ulcers. The most familiar brand names include Prilosec (omeprazole), Nexium (esomeprazole), and Prevacid (lansoprazole). These medications have become remarkably popular since they were introduced in the 1990s, and many are available without a prescription, which has contributed to their widespread use among people who may not even realize they’re taking a medication that’s becoming a subject of medical concern. What makes PPIs so appealing to consumers and doctors alike is their effectiveness at controlling acid symptoms. For someone with severe acid reflux, these medications can be genuinely life-changing, allowing people to eat foods they previously had to avoid and sleep through the night without painful symptoms.
A person who has suffered with uncontrolled acid reflux for years may experience dramatic relief within days of starting a PPI. This powerful symptom control has made these drugs a default first-line treatment for many gastroenterologists and primary care physicians. However, the widespread adoption and ease of access to PPIs has led to a troubling trend: many people take these medications long-term without having their ongoing need reassessed. Some patients who start PPIs for a temporary condition continue taking them for years, even after their original problem has resolved. This pattern of extended use is precisely what concerns researchers studying the dementia connection.
The Research Findings: What Does 33 Percent Higher Risk Actually Mean?
The 2023 Mayo Clinic study, which was more comprehensive than the earlier 2019 research, examined data from thousands of patients and found a consistent pattern: those who took PPIs continuously for more than 4.4 years showed a 33 percent increase in dementia risk. To put this in perspective, if the baseline dementia risk for an average 65-year-old is roughly 1 in 10 over a remaining lifespan, a 33 percent increase would elevate that to approximately 1 in 7. This is a meaningful increase, though it’s important to note that it doesn’t mean everyone taking PPIs will develop dementia. One critical limitation that researchers emphasize repeatedly is that this is an association, not proof of causation. The studies show that PPI users and non-users have different dementia rates, but they don’t definitively prove that the medication itself causes the cognitive decline.
It’s possible that people who need long-term PPIs have other underlying health conditions that also increase dementia risk, or that other lifestyle factors play a role. This is why the medical community has not recommended abruptly stopping PPIs—doing so could cause serious harm to people with legitimate gastrointestinal conditions. The earlier 2019 study that found 44 percent higher risk included fewer participants and had a different study design, which is why the more recent 2023 findings are considered more reliable. However, both studies consistently pointed in the same direction: extended PPI use correlates with increased dementia risk. This consistency across multiple studies is what has prompted serious medical institutions like Mayo Clinic to begin investigating the mechanism behind this association and to advise patients and physicians to reconsider whether long-term PPI use is truly necessary.
How Might PPIs Affect Brain Health?
Researchers have proposed several potential mechanisms by which long-term PPI use could contribute to cognitive decline, though none have been definitively proven. One theory involves vitamin B12 absorption: PPIs reduce stomach acid, which is necessary for absorbing B12 from food. Chronic B12 deficiency is known to cause neurological problems, including memory loss and cognitive decline. A person on long-term PPI therapy might gradually develop B12 deficiency without realizing it, potentially damaging nerve cells in the process. Another hypothesis involves changes to the gut microbiome. Stomach acid plays a critical role in controlling which bacteria can survive in the digestive system.
When PPIs reduce acid production, the bacterial balance shifts, potentially allowing harmful bacteria to flourish while beneficial species decline. Research has increasingly shown links between gut bacteria and brain function, including conditions like depression, anxiety, and possibly cognitive decline. If PPIs are fundamentally altering the gut environment, they might indirectly affect brain health through this pathway. A third mechanism relates to calcium absorption and magnesium depletion. PPIs can interfere with the absorption of minerals essential for bone health and proper nervous system function. Some researchers wonder whether long-term mineral depletion from PPI use could accumulate over years, eventually affecting the brain’s ability to function optimally. These theories remain speculative, and much more research is needed to determine which, if any, explains the observed association between PPIs and dementia risk.
Should You Stop Taking Your Heartburn Medication?
The short answer is no—you should not abruptly stop taking a PPI without medical guidance, even if you’re concerned about dementia risk. For people with severe acid reflux disease, Barrett’s esophagus, or other serious gastrointestinal conditions, PPIs are genuinely protective and stopping them could cause significant harm. The comparison here is important: the known risks of uncontrolled acid reflux—including esophageal damage, ulcers, and impaired nutrition—must be weighed against the observed but not-yet-proven connection to dementia risk. Instead, the appropriate step is to have a conversation with your doctor about whether your long-term PPI use is still necessary. Many people who were prescribed PPIs years ago never had a formal reassessment of whether they still need the medication.
The American College of Gastroenterology recommends using PPIs at the lowest effective dose for the shortest duration possible. If you’ve been on a PPI for years, your doctor might try gradually reducing your dose or switching you to a less potent acid-reducing medication like an H2 blocker (such as Pepcid) to see if you can maintain symptom control with a lower-risk option. For people with mild or moderate heartburn who may be using PPIs unnecessarily, there’s a stronger case for exploring alternatives. Lifestyle modifications—such as avoiding trigger foods, eating smaller meals, losing weight if needed, and not eating close to bedtime—can sometimes control symptoms adequately without medication. Some people successfully manage their acid reflux with antacids or H2 blockers, which carry less research concern than PPIs.
The Complication of Long-Term Use and Age Considerations
One important warning from this research is that the dementia risk association appears strongest in people who have taken PPIs for extended periods—specifically more than 4.4 years. This means that short-term PPI use, such as taking one for a few weeks after a flare-up of acid reflux, appears to carry minimal dementia risk based on current evidence. The danger seems to emerge with chronic, continuous use over many years. This distinction matters greatly because it changes the risk-benefit calculation for different patient populations. Age is another consideration that deserves attention. Older adults who start taking PPIs late in life for legitimate medical reasons face a different risk calculus than younger people who might use them for minor heartburn symptoms.
A 70-year-old person who has just been diagnosed with an ulcer and needs a PPI for a year probably faces less dementia risk from the medication than someone who started taking over-the-counter Prilosec at age 45 for occasional heartburn and continues it 25 years later. The limitation of current research is that we don’t have precise data on how age at initiation, total duration, or dosage interact to determine individual risk. Additionally, there’s a significant warning about deprescribing—the medical term for carefully stopping medications that may no longer be needed. Some patients experience “rebound acid hypersecretion” when they stop PPIs, meaning their acid production temporarily spikes to uncomfortable levels. This can make it difficult for people to discontinue these medications even if they want to. Working with a gastroenterologist who can provide proper tapering and monitoring is essential if you decide to reduce or stop PPI use.
Other Medications and Brain Health: A Broader Perspective
The PPI-dementia connection isn’t an isolated concern among medications used by older adults. Research has raised similar questions about other commonly used drugs, including anticholinergic medications (used for allergies, urinary incontinence, and other conditions) and benzodiazepines (anxiety and sleep medications). Some studies suggest that cumulative exposure to these types of medications over years may contribute to cognitive decline.
This doesn’t mean all these medications are bad—many are essential for quality of life—but it underscores the importance of periodic medication reviews with your doctor. For someone taking multiple medications, this research highlights why having a comprehensive medication review is valuable. A pharmacist or doctor can evaluate whether each medication is still necessary, whether alternatives exist, and whether any combinations might pose particular risks. Many older adults are taking medications that were prescribed years ago but no longer provide clear benefit, and deprescribing these medications can sometimes improve overall health outcomes while reducing dementia risk.
The Future of Research and What Patients Should Watch For
As research into PPIs and dementia risk continues, future studies will likely focus on understanding the mechanism of action—that is, determining exactly how these medications might increase dementia risk. This knowledge could lead to identifying which patients are at highest risk, whether alternative medications would be safer, or whether specific interventions (like B12 supplementation for PPI users) might mitigate the risk. The field of medication safety is increasingly recognizing that long-term effects often go undetected until large populations have been exposed for many years.
The conversation around PPIs and dementia also reflects a broader shift in medicine toward questioning whether we use some medications too broadly and for too long. The fact that millions of people are taking PPIs for minor heartburn—when lifestyle changes or other treatments might suffice—suggests there’s room for a cultural shift in how these medications are prescribed and used. In the coming years, expect to see more emphasis on deprescribing and on reassessing the necessity of long-term medication use, particularly in older adults.
Conclusion
The Mayo Clinic research linking long-term proton pump inhibitor use to a 33 percent increased risk of dementia is significant enough that anyone taking these medications should discuss their continued necessity with their doctor. While the research shows association rather than proven causation, the consistency of findings across multiple studies and the massive number of people taking these drugs makes this a public health concern worth taking seriously. The good news is that this doesn’t necessarily mean stopping your medication—it means having an informed conversation with your healthcare provider about whether your current regimen is truly necessary and whether there are safer alternatives.
If you’re taking a PPI, schedule an appointment to review your medication list with your doctor or pharmacist. Ask whether you still need the medication, whether a lower dose might work, or whether you could try stepping down to an H2 blocker or lifestyle modifications. For those just starting PPIs for new symptoms, it’s worth exploring non-medication approaches first and using the lowest effective dose for the shortest time necessary. By taking an active role in understanding your medications and their long-term effects, you can make informed decisions that support both your current comfort and your long-term brain health.
Frequently Asked Questions
If I’ve been taking PPIs for 10 years, do I definitely have dementia?
No. The research shows an increased statistical risk, not a certainty. Many people who take PPIs long-term never develop dementia. This is why the finding is described as an “association”—it shows a correlation in large populations, not a guaranteed outcome for individuals.
Are all PPIs equally risky, or is one brand safer than others?
Current research hasn’t identified significant differences in dementia risk between different PPIs. All medications in this class work similarly by reducing stomach acid. The risk appears related to the class of medication and duration of use rather than to specific brands.
What’s the difference between a PPI and an H2 blocker?
Both reduce stomach acid but work differently. H2 blockers (like Pepcid or Zantac) are less potent and are typically used for milder heartburn. PPIs are stronger and more effective for severe acid reflux, but they’re also associated with the dementia risk. H2 blockers haven’t been linked to similar dementia concerns in research studies.
How quickly can I stop taking my PPI?
You shouldn’t stop suddenly without medical guidance. Some people experience uncomfortable rebound acid production. Your doctor can help you taper the dose gradually, typically over weeks or months, while monitoring your symptoms.
What if lifestyle changes don’t control my acid reflux without medication?
Then medication is appropriate and necessary. The key is using the lowest effective dose for the shortest duration needed. If you need long-term medication for a legitimate medical condition, the benefits of controlling that condition typically outweigh the dementia risk shown in current research.
Should older adults avoid PPIs completely?
Not necessarily. The risk-benefit calculation differs based on age, health status, and the severity of the condition being treated. An older adult with an ulcer or severe reflux disease may genuinely need a PPI despite the increased dementia risk, while someone with occasional heartburn might achieve better outcomes through alternatives.
You Might Also Like
- Yale Researchers Identify New Brain Protein That Could Reverse Dementia Damage
- Stanford Study Finds Single Gene Mutation Doubles Dementia Risk in 1 in 50 People
- Why Losing Interest in Hobbies You Once Loved May Be a Dementia Warning Sign
For more, see NIH MedlinePlus — dementia.
