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A report based on National Institutes of Health and FDA information says long-term use of some proton pump inhibitors and diuretics can lower magnesium. It advises discussing medicines and possible testing with a health professional; patients should not stop prescribed drugs or start supplements without guidance.
A Sixty and Me report drawing on information from the National Institutes of Health and the U.S. Food and Drug Administration says long-term use of some heartburn medicines and diuretics can lower magnesium, and urges patients to ask a health professional whether testing is appropriate. The report stresses that people should not stop prescribed medicines or begin supplements without discussing it with their clinician.
The medicines highlighted are proton pump inhibitors (PPIs), including omeprazole, esomeprazole, lansoprazole and pantoprazole. The NIH Office of Dietary Supplements says prescription PPIs may cause low magnesium when used over a long period, typically more than a year. The report says the FDA advises doctors to consider checking magnesium before long-term PPI treatment and periodically afterward. People taking an over-the-counter PPI daily are advised to tell their clinician how long they have used it.
Some loop and thiazide diuretics can increase magnesium loss in urine with long-term use, according to the NIH information cited in the report. Examples include furosemide and hydrochlorothiazide. Potassium-sparing diuretics, including spironolactone, are described as having the opposite effect on magnesium loss. The effects vary by medicine, so the article recommends reviewing a complete medication list rather than assuming every heartburn or water pill poses the same risk.
The report notes that magnesium may not appear on routine blood work. The NIH says less than one percent of the body’s magnesium is in blood, and blood levels do not closely reflect total body stores. A blood test remains the most commonly used and readily available assessment, but no single test is considered fully satisfactory. Clinicians may interpret results alongside a person’s medicines, health history and symptoms.
Medication Reviews Can Flag Magnesium Risk
The issue matters because long-term medicine use is common, while magnesium may not be included in standard electrolyte testing. Older adults are listed by the NIH as being at greater risk of low magnesium; factors can include lower dietary intake, reduced absorption, greater urinary losses, chronic illness and medications. The report frames a medication review and a direct question about magnesium as a way to identify whether further assessment is warranted—not as evidence that every person taking these drugs has a deficiency.
Early signs listed by the NIH include loss of appetite, nausea, fatigue and weakness. More severe deficiency can involve tingling, numbness, muscle cramps, seizures, personality changes or an abnormal heart rhythm. These symptoms can have many causes, so they cannot establish low magnesium on their own. The report says seizures or a racing or irregular heartbeat require immediate medical care.
Supplement use also merits discussion. The report warns that people with kidney disease may have trouble clearing excess magnesium. It recommends asking a clinician or pharmacist about medicines and testing before starting a supplement, while noting that magnesium-rich foods can contribute to dietary intake.
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Which Medicines Affect Magnesium
PPIs reduce stomach acid and are used for conditions such as reflux and ulcers. The NIH information cited in the source concerns prescription PPIs and long-term use, generally more than a year. The report also says that in FDA-reviewed cases of PPI-associated low magnesium, supplements often raised levels, but in about one quarter of those reported cases they did not, and the patient had to stop the PPI. That figure describes cases reviewed by the FDA; it does not estimate an individual user’s likelihood of developing low magnesium.
Diuretics increase urine production, but their effects on magnesium depend on the type. Loop and thiazide medicines can increase urinary magnesium loss, while potassium-sparing drugs can reduce that loss. The report also emphasizes that a basic chemistry panel may not include a magnesium measurement. A normal result, if one is available, does not necessarily show the body’s full magnesium stores, though clinicians can use the test as one part of an assessment.
“The FDA advises doctors to consider checking magnesium before starting long-term PPI treatment and to check it periodically after that.”
— U.S. Food and Drug Administration guidance, as summarized in the supplied report
Testing Cannot Show Every Magnesium Store
The source does not provide the report’s publication date, new clinical research, or estimates of how often users of these medicines develop low magnesium. The FDA-reviewed case figure is not a measure of personal risk. It is also not clear from a blood result alone how much magnesium is stored throughout the body, and symptoms such as fatigue or cramps are not specific to deficiency. Whether testing is appropriate depends on an individual’s medication duration, health conditions and clinical assessment.
The report does not say that everyone taking a PPI or diuretic needs a test or supplement. It also does not establish that a particular symptom in an individual is caused by a medicine. Those questions require discussion with a qualified health professional.
Bring a Medicine List to Your Clinician
The practical next step described in the report is to write down all prescription and over-the-counter medicines, including how long each has been taken, and review the list with a doctor or pharmacist. Patients can ask whether any medicines may affect magnesium, whether their level has been checked and whether testing is appropriate. They should keep taking prescribed medicines unless their clinician advises a change.
People considering magnesium supplements should ask first, particularly if they have kidney disease. The report also points to food sources such as pumpkin seeds, almonds, spinach and black beans. Any decision about testing, diet changes or treatment should be based on individual circumstances and professional guidance.
Key Questions
Which heartburn medicines are mentioned?
The report names proton pump inhibitors, including omeprazole, esomeprazole, lansoprazole and pantoprazole. The NIH information cited says prescription use over a long period, typically more than a year, may cause low magnesium.
Can every water pill lower magnesium?
No. The report says loop and thiazide diuretics can increase magnesium loss in urine, while potassium-sparing diuretics such as spironolactone can reduce that loss. Ask a clinician or pharmacist about the specific medicine you take.
Does routine blood work include a magnesium test?
Not necessarily. The source says routine electrolyte testing may not include magnesium. A blood test is commonly used, but it does not fully represent magnesium stored in bones and soft tissues, so clinicians may consider other information too.
Should I stop my medicine or start a supplement?
Do not stop a prescribed medicine or start a magnesium supplement without discussing it with a health professional. The report specifically advises people with kidney disease to seek guidance before taking supplements.
Source: sixtyandme.com
