Magnesium Oxide

SPL v13

SPL

SPL Set ID 52eeac0e-94bb-48c3-81dc-578e96406c01

Route

ORAL

Published

Effective Date 2025-08-05

Document Type 34390-5 HUMAN OTC DRUG LABEL

Drug Facts

Composition & Product

Active Ingredients

Magnesium Cation (400 mg)

Inactive Ingredients

Microcrystalline Cellulose Croscarmellose Sodium Starch, Corn Silicon Dioxide Stearic Acid

Identifiers & Packaging

Pill Appearance

Imprint: AM3 Shape: round Color: white Size: 11 mm Score: 2

Marketing Status

OTC MONOGRAPH DRUG Active Since 2020-10-15

Description

Drug Facts

Purpose

Antacid

Medication Information

Purpose

Antacid

Description

Drug Facts

Use

relieves:

acid indigestion
upset stomach

Section 42229-5

Drug Facts

Section 50565-1

Keep out of reach of children.

Section 50570-1

Do not take more than 2 tablets in a 24 hour period.

May have a laxative effect.

Directions

take one or two antacid tablets daily. Do not exceed two tablets unless directed by a physician.

Questions?

Call 1-844-221-7294 M-F 9am - 5pm EST

Active Ingredient

Magnesium Oxide 400 mg (241.3 mg Elemental Magnesium)

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.

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.

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

Structured Label Content

Use

relieves:

acid indigestion
upset stomach

Section 42229-5 (42229-5)

Drug Facts

Section 50565-1 (50565-1)

Keep out of reach of children.

Section 50570-1 (50570-1)

Do not take more than 2 tablets in a 24 hour period.

May have a laxative effect.

Purpose

Antacid

Directions

take one or two antacid tablets daily. Do not exceed two tablets unless directed by a physician.

Questions?

Call 1-844-221-7294 M-F 9am - 5pm EST

Active Ingredient

Magnesium Oxide 400 mg (241.3 mg Elemental Magnesium)

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.

Ask A Doctor Before Use If (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.

Principal Display Panel 400 Mg Tablet Bottle Label (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

Advanced Ingredient Data

[{"name": "MAGNESIUM CATION", "unii": "T6V3LHY838", "classCode": "ACTIM", "strengthNumerator": "400", "strengthDenominator": "1", "strengthNumeratorUnit": "mg", "strengthDenominatorUnit": "1"}, {"name": "MICROCRYSTALLINE CELLULOSE", "unii": "OP1R32D61U", "classCode": "IACT", "strengthNumerator": "", "strengthDenominator": "", "strengthNumeratorUnit": "", "strengthDenominatorUnit": ""}, {"name": "CROSCARMELLOSE SODIUM", "unii": "M28OL1HH48", "classCode": "IACT", "strengthNumerator": "", "strengthDenominator": "", "strengthNumeratorUnit": "", "strengthDenominatorUnit": ""}, {"name": "STARCH, CORN", "unii": "O8232NY3SJ", "classCode": "IACT", "strengthNumerator": "", "strengthDenominator": "", "strengthNumeratorUnit": "", "strengthDenominatorUnit": ""}, {"name": "SILICON DIOXIDE", "unii": "ETJ7Z6XBU4", "classCode": "IACT", "strengthNumerator": "", "strengthDenominator": "", "strengthNumeratorUnit": "", "strengthDenominatorUnit": ""}, {"name": "STEARIC ACID", "unii": "4ELV7Z65AP", "classCode": "IACT", "strengthNumerator": "", "strengthDenominator": "", "strengthNumeratorUnit": "", "strengthDenominatorUnit": ""}]

Raw Label Data

All Sections (JSON)

{"Use": "relieves: acid indigestion upset stomach", "42229-5": "Drug Facts", "50565-1": "Keep out of reach of children.", "50570-1": "Do not take more than 2 tablets in a 24 hour period. May have a laxative effect.", "Purpose": "Antacid", "Directions": "take one or two antacid tablets daily. Do not exceed two tablets unless directed by a physician.", "Questions?": "Call 1-844-221-7294 M-F 9am - 5pm EST", "Active Ingredient": "Magnesium Oxide 400 mg (241.3 mg Elemental Magnesium)", "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.", "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.", "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"}

Additional Information

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Source: dailymed · Ingested: 2026-02-15T12:06:43.284999 · Updated: 2026-03-14T23:09:39.646164