Over-the-counter medicine
Magnesium oxide
Magnesium oxide is an over-the-counter medicine. No generic is listed; pharmacies paid $0.0346 per magnesium oxide 400 mg tablet in the October 7, 2026 NADAC survey.
- No generic listed
- Over the counter
Check it at the source: the magnesium oxide FDA label on DailyMed (effective July 6, 2026); every magnesium oxide label on DailyMed.
Highlights of the record
FDA label of July 6, 2026; NDC Directory, Drugs@FDA and Orange Book, October 8, 2026; NADAC October 7, 2026
Used for
From the label: indications and usagerelieves: acid indigestion upset stomach
Forms and strengths
- 241.3 mg
- 253 mg
- 400 mg
- 420 mg
- 440 mg
Tablet.
On the market
- Generic approvals
- No generic approved
- Labelers listed (NDC)
- 14 of which 0 under generic applications, 0 under brand applications, repackagers included
Supply and safety
- Pharmacy cost (NADAC)
- $0.0346 per tablet Magnesium oxide 400 mg tablet
- Shortage (FDA)
- No current entry
- Recalls by its makers (FDA)
- No recall recorded
- FAERS reports
- 42,078 through July 30, 2026
What is magnesium oxide used for?
From the label: indications and usagerelieves: acid indigestion upset stomach
Conditions named in the indications of magnesium oxide's FDA labels, with every medicine labeled for each:
From other magnesium oxide labelsAcid reflux and ulcers: USES relieves acid indigestion upset stomach
Source: FDA drug label (Magnesium Oxide), Westminster Pharmaceuticals, LLC, effective July 6, 2026 (SPL set 52eeac0e-94bb-48c3-81dc-578e96406c01), via openFDA; the full label on DailyMed
Is there a generic for magnesium oxide?
No generic magnesium oxide is approved (Drugs@FDA, October 8, 2026).
Source: Drugs@FDA, FDA NDC Directory and the Orange Book (openFDA bulk files, October 8, 2026)
What do pharmacies pay for magnesium oxide?
In CMS's NADAC survey of October 7, 2026, pharmacies paid $0.0346 per Magnesium oxide 400 mg tablet, down 4% from $0.0358 on October 8, 2025. The chart's scale runs from the lowest to the highest price shown, not from zero. NADAC is what retail pharmacies paid their wholesalers, per unit, in CMS's monthly survey; what a patient pays depends on insurance and the pharmacy.
- Magnesium oxide 400 mg tablet (generic)
| Strength and form | Brand or generic | Pharmacy cost | 30 tablets, or one pen or vial | 12-month change |
|---|---|---|---|---|
| Magnesium oxide 400 mg tablet | Generic | $0.0346 per tablet | $1.04 | -4% |
| Magnesium oxide 420 mg tablet | Generic | $0.0385 per tablet | $1.15 | -2% |
Source: CMS National Average Drug Acquisition Cost (NADAC) survey, October 7, 2026: what retail pharmacies paid per unit; not a counter price
What does the magnesium oxide label say about other medicines?
The magnesium oxide label names no other medicine on this site. The labels of 1 other medicine name magnesium oxide. The sentences are the labels' own; a label lists what its studies and reports found, not every interaction.
Other labels that name magnesium oxide
Source: FDA drug label (Magnesium Oxide), Westminster Pharmaceuticals, LLC, effective July 6, 2026 (SPL set 52eeac0e-94bb-48c3-81dc-578e96406c01), via openFDA; the full label on DailyMed
What do FAERS reports show for magnesium oxide?
The FDA Adverse Event Reporting System holds 42,078 reports that list magnesium oxide among the medicines taken, through July 30, 2026, each a report of something that happened, not proof the medicine caused it; 6,552 are coded as a death and 20,897 as a hospital stay. Counts follow how widely a medicine is used and watched, and they are not a measure of how risky it is.
Reports received each year
The most reported reactions
Source: FDA Adverse Event Reporting System (FAERS) via openFDA, reports through July 30, 2026
What else is labeled for the same conditions as magnesium oxide?
21 other medicines are given the same way (oral) and in the same FDA class as magnesium oxide or labeled mainly for the same use (acid reflux and ulcers), the same class first. Acid reflux and ulcers lists all 27 medicines labeled for it, by any route. The first 8 are below. They are listed as records, not as substitutes: whether one can replace another is a prescriber's decision.
| Medicine | Shared indication | Generic labelers (oral) | Pharmacy cost | Shortage |
|---|---|---|---|---|
| Calcium carbonate | Acid reflux and ulcers | none listed | $0.0315 per tablet 750 mg tablet chewable | No current entry |
| Omeprazole | Acid reflux and ulcers | 121 labelers | $0.0295 per capsule 20 mg capsule | A presentation being discontinued |
| Famotidine | Acid reflux and ulcers | 144 labelers | $0.0289 per tablet 20 mg tablet | No current entry |
| Esomeprazole | Acid reflux and ulcers | 117 labelers | $0.145 per capsule 20 mg capsule | No current entry |
| Pantoprazole | Acid reflux and ulcers | 52 labelers | $0.0358 per tablet 40 mg tablet | No current entry |
| Lansoprazole | Acid reflux and ulcers | 59 labelers | $0.106 per capsule 30 mg capsule | No current entry |
| Sucralfate | Acid reflux and ulcers | 43 labelers | $0.173 per tablet 1 g tablet | No current entry |
| Metoclopramide | Acid reflux and ulcers | 28 labelers | $0.0439 per tablet 10 mg tablet | No current entry |
Every medicine labeled for the same conditions as magnesium oxide
Source: FDA drug labels (indications), NDC Directory, NADAC of October 7, 2026, FDA shortages (October 8, 2026)
How does magnesium oxide compare with medicines for the same use?
1 side-by-side page set magnesium oxide beside a medicine whose label shares a use: approvals, generics, pharmacy cost, warnings and supply.
What next?
- Alternatives to magnesium oxide
- 21 medicines for the same use
- Magnesium oxide side effects
- the label's list beside FAERS reports
- Check an interaction
- what two or more labels say about each other