Dosage and administration
take one or two antacid tablets daily. Do not exceed two tablets unless directed by a physician.
Magnesium Oxide
- Manufacturer
- Westminster Pharmaceuticals, LLC
- Effective date
- 2026-07-06
- Label type
- HUMAN OTC DRUG LABEL
- Version
- 16
- Source
- daily-update
- Hydrated at
- 2026-07-25 05:10:26
Label at a glance#
ProductMagnesium Oxide
Active ingredientMAGNESIUM OXIDE
Label structure10 sections
Storage and handling
Store at controlled room temperature 15° to 30°C (59° to 86°F). Tamper evident, do not use if imprinted safety seal under cap is broken or missing.
Contacts and useful links#
Label contents#
Full prescribing information#
SPL UNCLASSIFIED SECTION
Drug Facts
Active Ingredient
Magnesium Oxide 400 mg (241.3 mg Elemental Magnesium)
Purpose
Antacid
Use
relieves:
- acid indigestion
- upset stomach
Warnings
Ask a doctor before use if
- you have kidney disease
- you are taking a prescription drug (antacids may interact with certain prescription drugs)
- you are pregnant or breast feeding.
OTC - DO NOT USE SECTION
Do not take more than 2 tablets in a 24 hour period.
- May have a laxative effect.
OTC - KEEP OUT OF REACH OF CHILDREN SECTION
Keep out of reach of children.
Directions
- take one or two antacid tablets daily. Do not exceed two tablets unless directed by a physician.
Other Information
- Store at controlled room temperature 15° to 30°C (59° to 86°F).
- Tamper evident, do not use if imprinted safety seal under cap is broken or missing.
Inactive Ingredients
Colloidal Silicon Dioxide, Corn Starch, Croscarmellose Sodium, Microcrystalline Cellulose, and Stearic Acid.
Questions?
Call 1-844-221-7294 M-F 9am - 5pm EST
PRINCIPAL DISPLAY PANEL - 400 mg Tablet Bottle Label
NDC 69367-298-20
Magnesium
Oxide 400 mg
241.3 mg Elemental Magnesium
Antacid
Sugar and Gluten Free
120 Tablets
Westminster
Pharmaceuticals
DailyMed Product Concepts#
Products#
Every source-derived product name is available through these pages.
- Magnesium Oxide
- MAGNESIUM CATION
- MICROCRYSTALLINE CELLULOSE
- CROSCARMELLOSE SODIUM
- STARCH, CORN
- SILICON DIOXIDE
- STEARIC ACID
NDC Codes#
| Product NDC | Package NDC |
|---|---|
| 69367-298 | 69367-298-20 |
Ingredients#
Every source-derived ingredient row is available through these pages.
| Name | UNII | Kind |
|---|---|---|
| MAGNESIUM OXIDE | 3A3U0GI71G | ACTIM |
| MICROCRYSTALLINE CELLULOSE | OP1R32D61U | IACT |
| CROSCARMELLOSE SODIUM | M28OL1HH48 | IACT |
| STARCH, CORN | O8232NY3SJ | IACT |
| SILICON DIOXIDE | ETJ7Z6XBU4 | IACT |
| STEARIC ACID | 4ELV7Z65AP | IACT |
Source Document#
Older Hydrated Versions#
| Version | Effective date | Source | Hydrated |
|---|---|---|---|
| 15 | 2026-07-06 | weekly-update | 2026-07-17 21:44:02 |
| 13 | 2025-08-05 | full-release | 2026-06-01 01:09:47 |
openFDA label cross-check#
OpenFDA label data provides additional search and identifier links. DailyMed’s Structured Product Label is the canonical label on FDA.report. Matching records are deduplicated before they are shown below.
| Brand | Generic | Manufacturer | SPL set ID | Effective date | Available safety fields | Join |
|---|---|---|---|---|---|---|
| Magnesium Oxide | MAGNESIUM OXIDE | Westminster Pharmaceuticals, LLC | 52eeac0e-94bb-48c3-81dc-578e96406c01 | 2026-07-06 | Warnings | 69367-298-20 69367-298 69367029820 7afa67e6-50ba-4aac-9607-d38b690e5dc0 52eeac0e-94bb-48c3-81dc-578e96406c01 |
Reported adverse events (FAERS/openFDA)#
Adverse event summaries are temporarily unavailable. Other product information remains available.