Magnesium Oxide · MAGNESIUM OXIDE 400 mg/1 · Tablet · Oral · Westminster Pharmaceuticals, LLC
NDC 69367-0298-20 · 120 TABLET in 1 BOTTLE · OTC MONOGRAPH DRUG · View full market →
13 companies supply this market — deep enough that no single failure threatens the supply. The price has held steady around $0.0347 per unit over the past year. Put together: this looks like a healthy supply — the boring kind, which is exactly what you want.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.
Medicare Part D does not cover over-the-counter drugs — by law it pays only for products requiring a prescription.
How Part D pricing works →Estimates: latest NADAC unit price × quantity. Pharmacy acquisition cost only — excludes dispensing fees, markup, and insurance terms.
Nothing here is signaling trouble: several manufacturers, no current shortage, no recent serious recalls, stable pricing. In drug supply, boring is the good outcome.
The score counts pressure that is already visible — fewer makers, shortages, recalls, falling prices. 0 means none of it; 100 means all of it at once. Recomputed daily · as of Sep 3, 2026
sole-source market
For scale: the typical drug’s chance is about 0.1% — this one is in ordinary territory.
Backtested statistical model over the whole market, not this package alone. Model details →
There's no legal definition — it meets 1 of 6 public criteria. Why that matters →
No FDA shortage reports for this drug or its presentations.
No enforcement reports list this package NDC.
| Labeler | Strength | First seen | Last seen |
|---|---|---|---|
| Aphena Pharma Solutions - Tennessee, LLC | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| Bryant Ranch Prepack | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 3, 2026 |
| A-S Medication Solutions | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Apnar Pharma Lp | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Belleview Bioscience LLC | MAGNESIUM OXIDE 400 mg/400mg | Jul 15, 2026 | Sep 2, 2026 |
| Belleview Biosciences | MAGNESIUM OXIDE 241.3 mg/1000mg | Jul 15, 2026 | Sep 2, 2026 |
| Endo USA | MAGNESIUM OXIDE 253 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Endo USA | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Kesin Pharma | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Marlex Pharmaceuticals Inc | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Marlex Pharmaceuticals Inc. | MAGNESIUM OXIDE 420 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Method Pharmaceuticals, LLC | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Richmond Pharmaceuticals, Inc. | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Richmond Pharmaceuticals, Inc. | MAGNESIUM OXIDE 420 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
| Westminster Pharmaceuticals, LLC | MAGNESIUM OXIDE 400 mg/1 | Jul 15, 2026 | Sep 2, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
DrugDashboards, "Magnesium Oxide — NDC 69367-0298-20," retrieved September 3, 2026, https://drugdashboards.com/drug/69367029820.
Free to cite with attribution — see how the data is put together.