Active ingredient
Magnesium Oxide
27 finished FDA listings contain Magnesium Oxide as their only active ingredient; 57 combination products also contain it.
FDA NDC Directory
- Ingredient names as written by FDA
- MAGNESIUM OXIDE
- Dosage forms
- Pellet, Tablet
- Routes
- Oral
- Manufacturers / labelers
- 15
- Strengths listed
- 1 [hp_m]/1 · 1 [hp_q]/1 · 100 [hp_c]/1 · 12 [hp_c]/1 · 200 [hp_c]/1 · 241.3 mg/1000mg · 253 mg/1 · 30 [hp_c]/1 · 400 mg/1 · 420 mg/1 · 440 mg/1 · 500 [hp_c]/1 · 6 [hp_c]/1
- Brand names in FDA listings
- Mag 440
RxNorm (National Library of Medicine)
Ingredient concept RxCUI 6582
Drugs@FDA applications
Linked only where the FDA listing’s application number matches Drugs@FDA exactly. A listing in the NDC Directory does not by itself mean FDA approval.
No matching Drugs@FDA applications.
Official labeling on DailyMed
- MAGNESIUM OXIDE TABLET [WESTMINSTER PHARMACEUTICALS, LLC] · version 16 · 2026-07-24
- MAGNESIUM OXIDE TABLET [BRYANT RANCH PREPACK] · version 103 · 2026-05-25
- MAGNESIUM OXIDE TABLET [BRYANT RANCH PREPACK] · version 105 · 2026-04-27
- MAGNESIUM OXIDE TABLET [BRYANT RANCH PREPACK] · version 101 · 2026-03-31
- MAGNESIUM OXIDE TABLET [MARLEX PHARMACEUTICALS INC.] · version 7 · 2025-11-18
- MAGNESIUM OXIDE TABLET [MARLEX PHARMACEUTICALS INC] · version 3 · 2025-11-18
- MAGNESIUM OXIDE TABLET [METHOD PHARMACEUTICALS, LLC] · version 7 · 2025-11-17
- MAGNESIUM OXIDE TABLET [KESIN PHARMA] · version 2 · 2025-11-17
- MAGNESIUM OXIDE TABLET [A-S MEDICATION SOLUTIONS] · version 3 · 2025-11-17
- MAG 440 (MEGNESIUM OXIDE) TABLET [ALLEGIS PHARMACEUTICALS, LLC] · version 3 · 2025-04-18
- MAGNESIUM OXIDE TABLET [BELLEVIEW BIOSCIENCES] · version 1 · 2025-04-07
- MAGNESIUM OXIDE TABLET [RICHMOND PHARMACEUTICALS, INC.] · version 13 · 2024-12-30
Showing the 12 most recent of 20 labels.
Sources: FDA NDC Directory (2026-09-29), RxNorm, Drugs@FDA, DailyMed. Each source’s facts are shown separately as published.