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 $22.78, but a SingleCare Magnesium Oxide coupon brings this cost down to $12.04. SingleCare discounts are eligible on over-the-counter products, like Magnesium Oxide, when prescribed by a physician.

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Magnesium Oxide coupon at Publix Pharmacy
$ 12.04

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Magnesium Oxide coupon at Food Lion Pharmacy
$ 12.29

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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: 12/18/2025

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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 $22.78, but a SingleCare Magnesium Oxide coupon brings this cost down to $12.04. 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, 400mg

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, 400mg
PharmacyMagox 400 Retail PriceMagnesium Oxide Retail PriceMagnesium Oxide SingleCare Price
Walmart-$11.40$9.00
Walgreens$22.50$15.57$11.44
Kroger Pharmacy-$18.37$17.81
Albertsons Pharmacy-$11.70$11.70

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 $22.78, but a SingleCare Magnesium Oxide coupon brings this cost down to $12.04. SingleCare discounts are eligible on over-the-counter products, like Magnesium Oxide, when prescribed by a physician.

Magnesium Oxide FAQs

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 $22.78 for Magnesium Oxide. With a SingleCare discount card and a prescription for Magnesium Oxide, you pay only $12.04.

How much does Magnesium Oxide cost with insurance?

Magnesium Oxide is not covered by insurance. Currently, however, you will pay only $12.04 for Magnesium Oxide with a SingleCare savings card and a prescription for Magnesium Oxide. SingleCare is welcomed at major pharmacies throughout the nation, including CVS, Longs Drugs, Fry's, and Walgreens.

Does Medicare cover Magnesium Oxide and how much does it cost?

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 $12.04.

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, and 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.”

What is Magnesium Oxide?

Magnesium Oxide (also: MgO or magnesia) is a mineral that is used in dietary supplements or as a treatment for constipation or indigestion.

Magnesium is a critical element for the body and is used in several vital processes. It helps produce energy, activates muscles, sends electrical signals through nerves, maintains heartbeat, regulates glucose level, and mineralizes bone.

In dietary supplements, Magnesium Oxide is intended to help maintain normal levels of magnesium in the body. A balanced diet will provide sufficient magnesium, but a deficiency may result from poor nutrition, a problem with the kidneys, or use of certain medications, such as diuretics.

Several forms of magnesium are available as supplements: Magnesium Oxide, magnesium citrate, magnesium glycinate, and magnesium malate. Of the four, Magnesium Oxide is the most poorly absorbed by the body.

Magnesium Oxide is also an osmotic laxative and is commonly sold as “magnesia” for that purpose. Magnesium Oxide draws water into the intestines from the intestinal tissues to soften stools and make them easier to pass.

Magnesia also relieves indigestion and excess stomach acid. Magnesium Oxide neutralizes the acid in the stomach that causes indigestion.

What are the side effects of Magnesium Oxide?

The most common side effects of Magnesium Oxide are diarrhea, nausea, vomiting, slow heartbeats, or rectal bleeding. Allergic reactions are rare. However, Magnesium Oxide supplements or remedies often have other inactive ingredients, which may cause allergic reactions. These side effects include itching, rash, hives, eye pain, trouble breathing, or headache. If you have any reaction to Magnesium Oxide supplements, stop taking the supplement and consult with your physician.

Where are Magnesium Oxide coupons from SingleCare accepted?

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

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