Magnesium Oxide Coupons & Prices

Magox 400

Magnesium Oxide is a mineral commonly found in over-the-counter dietary supplements or constipation and indigestion remedies. Magnesium Oxide is often packaged as “MgO” or “magnesia.” Magnesium Oxide costs around $17.35, but a SingleCare Magnesium Oxide coupon brings this cost down to $12.25. SingleCare discounts are eligible on over-the-counter products, like Magnesium Oxide, when prescribed by a physician.

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30 capsule400mgEdit

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Magnesium Oxide coupon at Publix Pharmacy
$15.25
$ 12.25
$3 off with signupwith signup

Show this free card to your pharmacist.

This coupon is not insurance.
Magnesium Oxide coupon at Food Lion Pharmacy
$ 12.29
Magnesium Oxide coupon at Costco Pharmacy
$ 14.29
Magnesium Oxide coupon at Kroger Pharmacy
$21.65
$ 18.65
$3 off with signupwith signup
Magnesium Oxide coupon at Harris Teeter Pharmacy
$21.65
$ 18.65
$3 off with signupwith signup
Magnesium Oxide coupon at Walgreens Pharmacy
$30.56
$ 27.56
$3 off with signupwith signup

About SingleCare Pricing

SingleCare’s prescription prices are based on multiple sources. The prices we publish are our best estimate, but we cannot guarantee that the price we display will exactly match the price you receive at the pharmacy. For an exact price, please contact your pharmacy and provide the BIN/GRP/PCN numbers shown on your SingleCare card.

Any SingleCare bonus savings, including the $3 signup bonus, may only be used once.

Prices updated: 03/20/2026

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About Magnesium Oxide

Magnesium Oxide is a mineral commonly found in over-the-counter dietary supplements or constipation and indigestion remedies. Magnesium Oxide is often packaged as “MgO” or “magnesia.” Magnesium Oxide costs around $17.35, but a SingleCare Magnesium Oxide coupon brings this cost down to $12.25. SingleCare discounts are eligible on over-the-counter products, like Magnesium Oxide, when prescribed by a physician.

Magnesium Oxide Price History & Information

Price History for Magnesium Oxide (Generic) & Magox 400 (Brand)

90 count, tablet, 400 (240 mg)mg

Our price history metrics are calculated from aggregate prescription data that we receive from all participating pharmacies. This chart updates daily to show new price fluctuations. If a data point is missing from the chart, it is because we do not have enough data to produce a reliable figure.

Average 1-Month Prices for Magnesium Oxide (Generic) & Magox 400 (Brand)

90 count, tablet, 400 (240 mg)mg
PharmacyMagox 400 Retail PriceMagnesium Oxide Retail PriceMagnesium Oxide SingleCare Price
Walmart-$10.53$7.65
Walgreens$25.20$20.80$15.75
Kroger Pharmacy-$18.73$18.10
Albertsons Pharmacy-$196.20$119.70

These prices are based on the last month of SingleCare prescription fill data by major pharmacy. This table updates daily to show the most accurate typical prices by pharmacies. If a data point is missing from the table, it is because we do not have enough data to produce a reliable figure.

About Magnesium Oxide

Magnesium Oxide is a mineral commonly found in over-the-counter dietary supplements or constipation and indigestion remedies. Magnesium Oxide is often packaged as “MgO” or “magnesia.” Magnesium Oxide costs around $17.35, but a SingleCare Magnesium Oxide coupon brings this cost down to $12.25. SingleCare discounts are eligible on over-the-counter products, like Magnesium Oxide, when prescribed by a physician.

Magnesium Oxide FAQs

Medically reviewed by Jesse P. HoughtonMD, FACG
Fellow of the American College of Gastroenterology

How much is Magnesium Oxide with SingleCare?

The generic form of Magnesium Oxide costs $12.25 for 90, 400mg tablets with a free Magnesium Oxide coupon from SingleCare. But, you could pay less depending on your Rx information. Use the dropdown menu above to enter your Rx info (i.e., brand/generic, quantity, form, dosage) to find the most accurate price of Magnesium Oxide with SingleCare at your local pharmacies.

How much does Magnesium Oxide cost without insurance?

Magnesium Oxide is an over-the-counter dietary supplement. With or without insurance, customers can expect to pay $17.35 for Magnesium Oxide. With a SingleCare discount card and a prescription for Magnesium Oxide, you pay only $12.25.

How much does Magnesium Oxide cost with insurance?

Magnesium Oxide is typically not covered by insurance, as it is available over the counter. Currently, however, you will pay only $12.25 for Magnesium Oxide with a SingleCare savings card and a prescription for Magnesium Oxide. SingleCare is accepted at major pharmacies nationwide, including CVS, Longs Drugs, Fry's, and Walgreens.

Does Medicare cover Magnesium Oxide

Medicare prescription drug plans do not typically cover Magnesium Oxide. An easy way to reduce the cost of Magnesium Oxide is by using a SingleCare discount card with your prescription for Magnesium Oxide. A SingleCare Magnesium Oxide coupon reduces the price of Magnesium Oxide to $12.25.

What is the brand name of Magnesium Oxide?

Generic versions of Magnesium Oxide as a supplement are widely available under brand names such as Piping Rock, Nature Made, WonderLabs, and many others. The most popular brand for Magnesium Oxide remedies is Phillips Milk of Magnesia from Bayer. Generic Magnesium Oxide remedies are available under brands such as Equate, CVS, and Walgreens, but are often marketed as “MgO” or “magnesia.”

Ways to save on Magnesium Oxide

There are several ways to save on Magnesium Oxide if your insurance won’t cover it or if the cost with your insurance is unaffordable. Bayer, the manufacturer of Phillips Milk of Magnesia, may offer a patient assistance program or manufacturer rebates. Individuals with Medicare Part D may be eligible for the Extra Help program. Savings can also be achieved by using an HSA (health savings account)/FSA (flexible spending account) to cover your prescription costs. If you are willing to pursue all avenues, obtaining free samples from your healthcare provider may provide temporary support, but it is not a viable long-term solution. One such long-term solution that is always available—regardless of your insurance—is the SingleCare savings coupon.

Is there a cheaper alternative to Magnesium Oxide?

If Magnesium Oxide brands are too expensive for your budget, and you have been unsuccessful in pursuing savings options, there are other formulations of magnesium out there. These include magnesium glycinate, magnesium citrate, magnesium malate, and the topical forms of magnesium chloride and magnesium sulfate (both topical and intravenous). 

These other forms of magnesium can work just as well to enhance your magnesium levels as magnesium oxide. Just be careful when reading the recommended dosage on each bottle, as the milligrams may vary widely depending on the formulation.

How to use SingleCare for Magnesium Oxide

You can use SingleCare coupons at most major pharmacies and grocers, including Walgreens, Kroger, Walmart, CVS, Safeway, and more. Simply text, email, print, or save your free Magnesium Oxide coupon to your mobile wallet and show your pharmacist at checkout.

Medically reviewed by Jesse P. HoughtonMD, FACG
Fellow of the American College of Gastroenterology

Jesse P. Houghton, MD, FACG, was born and raised in New Jersey, becoming the first physician in his entire family. He earned his medical degree from New Jersey Medical School (Now Rutgers Medical School) in 2002. He then went on to complete his residency in Internal Medicine and his fellowship in Gastroenterology at the Robert Wood Johnson University Hospital in 2005 and 2008, respectively. He moved to southern Ohio in 2012 and has been practicing at Southern Ohio Medical Center as the Senior Medical Director of Gastroenterology since that time.

Dr. Houghton is the author of What Your Doctor Doesn't (Have the Time to) Tell You: The Gastrointestinal System. He is also an Adjunct Clinical Associate Professor of Medicine at the Ohio University School of Osteopathic Medicine. He has been in practice since 2008 and has remained board-certified in both Internal Medicine and Gastroenterology for his entire career. He has lent his expertise to dozens of online articles in the medical field.

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Where are Magnesium Oxide coupons from SingleCare accepted?

SingleCare is accepted at most national pharmacies and grocers, including the following:

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