Magnesium Oxide

Product NDC: 54738-973
11-digit product format: 547380973
Labeler code: 54738
Product ID: 54738-973_2a329845-3f50-540c-e063-6394a90af0a9
Type: HUMAN OTC DRUG
Nonproprietary name: Magnesium Oxide
Dosage form: TABLET
Route: ORAL
Labeler: Richmond Pharmaceuticals, Inc.
Application: M001
Marketing category: OTC MONOGRAPH DRUG
Marketing start: 2016-02-01
Substance: MAGNESIUM OXIDE
Active strength: 400 mg/1
Pharmacologic classes: Calculi Dissolution Agent [EPC], Increased Large Intestinal Motility [PE], Inhibition Large Intestine Fluid/Electrolyte Absorption [PE], Inhibition Small Intestine Fluid/Electrolyte Absorption [PE], Magnesium Ion Exchange Activity [MoA], Osmotic Activity [MoA], Osmotic Laxative [EPC], Stimulation Large Intestine Fluid/Electrolyte Secretion [PE]
NDC exclude flag: No
Listing certified through: 2026-12-31
Current FDA listing: Yes

NDC auxiliary status#

These records are reproduced from FDA’s unfinished, excluded, and compounder listings. They describe what appeared in the source files; a missing record does not establish a regulatory status. View all current auxiliary records, including entries without an NDC. · View the auxiliary file history.

Current NDC status page 1 of 1 · 2 matching rows.

Dataset, Scope, Product NDC table
Dataset	Scope	Product NDC	Package NDC	Code	Status	Reporting period	Source date
excluded product	product	54738-973		D	Discontinued by firm		2026-08-03
excluded package	package	54738-973	54738-973-12	D	Discontinued by firm		2026-08-03

Observed NDC auxiliary status history#

This history shows the information present in each captured FDA auxiliary file. It is not a continuous regulatory timeline, and a missing record does not establish a status.

Historic NDC status page 1 of 1 · 24 matching rows.

View current auxiliary records. · View the auxiliary file history.

Captured / source date, Dataset, Scope table
Captured / source date	Dataset	Scope	Package NDC	Snapshot	Source SHA-256
2025-12-14 17:58 UTC · source 2025-12-05	excluded product	product		`d630ba8d3edf…`	`732f749b63fb…`
2025-12-14 17:58 UTC · source 2025-12-05	excluded package	package	54738-973-12	`d630ba8d3edf…`	`732f749b63fb…`
2025-08-27 00:01 UTC · source 2025-08-26	excluded product	product		`f5e01cc5f278…`	`a2eaf40c39c3…`
2025-08-27 00:01 UTC · source 2025-08-26	excluded package	package	54738-973-12	`f5e01cc5f278…`	`a2eaf40c39c3…`
2025-04-01 02:39 UTC · source 2025-03-31	excluded product	product		`2ef7874e63bc…`	`57b86245f4fa…`
2025-04-01 02:39 UTC · source 2025-03-31	excluded package	package	54738-973-12	`2ef7874e63bc…`	`57b86245f4fa…`
2025-03-28 20:22 UTC · source 2025-03-28	excluded product	product		`a1b67e2a42f9…`	`c4cf2c586c0d…`
2025-03-28 20:22 UTC · source 2025-03-28	excluded package	package	54738-973-12	`a1b67e2a42f9…`	`c4cf2c586c0d…`
2025-03-22 03:12 UTC · source 2025-03-21	excluded product	product		`cfe11265f3b6…`	`090c488252e2…`
2025-03-22 03:12 UTC · source 2025-03-21	excluded package	package	54738-973-12	`cfe11265f3b6…`	`090c488252e2…`
2025-03-10 12:48 UTC · source 2025-03-10	excluded product	product		`cdf11ea48f46…`	`ba0047e9e063…`
2025-03-10 12:48 UTC · source 2025-03-10	excluded package	package	54738-973-12	`cdf11ea48f46…`	`ba0047e9e063…`
2025-02-02 03:52 UTC · source 2025-01-31	excluded product	product		`302b2466d912…`	`e7b80fea0513…`
2025-02-02 03:52 UTC · source 2025-01-31	excluded package	package	54738-973-12	`302b2466d912…`	`e7b80fea0513…`
2025-01-20 13:05 UTC · source 2025-01-20	excluded product	product		`ed331223b511…`	`672a5bd82f5f…`
2025-01-20 13:05 UTC · source 2025-01-20	excluded package	package	54738-973-12	`ed331223b511…`	`672a5bd82f5f…`
2025-01-11 03:41 UTC · source 2025-01-10	excluded product	product		`0efc9e666f02…`	`f202fb6c5f17…`
2025-01-11 03:41 UTC · source 2025-01-10	excluded package	package	54738-973-12	`0efc9e666f02…`	`f202fb6c5f17…`
2024-11-09 02:27 UTC · source 2024-11-08	excluded product	product		`ad56d346431e…`	`cc804d4bbf1e…`
2024-11-09 02:27 UTC · source 2024-11-08	excluded package	package	54738-973-12	`ad56d346431e…`	`cc804d4bbf1e…`
2024-10-04 04:10 UTC · source 2024-10-03	excluded product	product		`367a005e9d99…`	`383a685ebd0f…`
2024-10-04 04:10 UTC · source 2024-10-03	excluded package	package	54738-973-12	`367a005e9d99…`	`383a685ebd0f…`
2024-07-10 04:00 UTC · source 2024-07-09	excluded product	product		`557ba5c1ecfa…`	`9c80585c8c6e…`
2024-07-10 04:00 UTC · source 2024-07-09	excluded package	package	54738-973-12	`557ba5c1ecfa…`	`9c80585c8c6e…`

Additional Listing Data#

Finished product: Yes
Brand name base: Magnesium Oxide
Listing expiration: 2026-12-31

Active Ingredients#

Ingredient, Strength table
Ingredient	Strength
MAGNESIUM OXIDE	400 mg/1

Harmonized UNII identifiers#

UNII identifiers page 1 of 1 · 1 matching rows.

Identifier, FDA.report destination table
Identifier	FDA.report destination
3A3U0GI71G	Internal UNII lookup

Harmonized RxCUI identifiers#

RxCUI identifiers page 1 of 1 · 1 matching rows.

Identifier, FDA.report destination table
Identifier	FDA.report destination
198741	Internal RxNorm lookup

Harmonized SPL set identifiers#

SPL set identifiers page 1 of 1 · 1 matching rows.

Identifier, FDA.report destination table
Identifier	FDA.report destination
9119b7f0-3e8a-7be7-e053-2995a90a4634	Available on FDA.report

DailyMed Product Concepts#

Product concept, Relation, Version table
Product concept	Relation	Version	Effective
6e3c022f-0786-43f1-8857-edff89d5153f	Product name	1	20260309
95250459-30e4-45c1-b08a-993044f49109	Product name	2	20250805
efd58652-cb8f-4018-91ca-4b0eb2ff729f	Product name	7	20240226
362d7abb-94e6-4c60-9a58-266894157713	Product name	1	20231023
e2db08c6-133f-4f4f-afb4-e90a2418d6f6	Product name	1	20230320
6bd95106-a412-1dad-b9cc-4cb74bfb27ce	Product name	2	20230315
9badc7be-250a-44ab-aa36-926af3f02679	Product name	1	20210527
2641ccb3-721d-4fbf-9f2f-ca2f18157a62	Product name	3	20210309
11ed6f83-cdd2-4637-8379-b1a1d3ae3cde	Product name	1	20181101
7cda52fc-125f-421c-8fea-bc1974370c49	Product name	2	20180703
86c45a79-b9f0-4476-a27c-6e10db098497	Product name	1	20180125
26acd337-b838-40ac-bcbc-05c3b81c8712	Product name	1	20170323
d5e51f11-ad28-caa4-4b49-4143974782ad	Product name	1	20150831
290f523a-f9db-9774-b5a9-e1f908ac1782	Product name	1	20150828
e7e58cd3-cacb-49df-8d34-1ee335614abb	Product name	1	20150609
0ca1d589-929b-4b33-bc5b-1d84abdafa6a	Product name	1	20150324
fc363c46-397b-4476-ac0f-70e43e8e4592	Product name	1	20150324
c6b65c52-69c7-df49-550a-a50c137f6218	Product name	1	20140508

DailyMed Package Descriptions#

Package NDC, Product, Description table
Package NDC	Product	Description	Form	Quantity	Strength	SPL version
54738-973-12	Magnesium Oxide	120 in 1 BOTTLE	TABLET	120		13

DailyMed Billing Units#

Package NDC, Billing unit, Product NDC table
Package NDC	Billing unit	Product NDC	DailyMed indexing SPL	SPL version	Effective
54738-973-12	EA - Each	54738-973	cda5701d-ab64-44dd-ae6a-54bd03c6e7fa	1	2018-10-11

DailyMed Dashboard NDC Coverage#

NDC, Dashboard title, SPL version table
NDC	Dashboard title	SPL version	Validation	Dashboard ZIP
54738-973	MAGNESIUM OXIDE TABLET [RICHMOND PHARMACEUTICALS, INC.]	13	Current NDC, Legacy NDC, 1 package rows	20241228_9119b7f0-3e8a-7be7-e053-2995a90a4634.zip

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.

Matched openFDA labels page 1 of 38 · 742 matching rows.

Brand, Generic, Manufacturer table
Brand	Generic	Manufacturer	SPL set ID	Effective date	Available safety fields	Join
TUMS ULTRA	CALCIUM CARBONATE	Haleon US Holdings LLC	348d3dfa-6a52-4583-96e3-83c4bf2df45b	2026-07-27	Warnings	Exact identifier application number: M001
Extra Strength Assorted Berry	CALCIUM CARBONATE	BJWC	bc56a82e-b875-4a4c-9b49-4bfbc6918724	2026-07-22	Warnings	Exact identifier application number: M001
Best Choice Ultra Strength	ANTACID TABLETS (CALCIUM CARBONATE)	BEST CHOICE (VALU MERCHANDISERS COMPANY)	1547b549-efd0-46da-8f91-3d7e4d4a2f3a	2026-07-17	Warnings	Exact identifier application number: M001
Best Choice Extra Strength Berry Flavor	CALCIUM CARBONATE ,MAGNESIUM HYDROXIDE,SIMETHICONE	BEST CHOICE (VALU MERCHANDISERS COMPANY)	529d7da6-5997-41f5-bfb8-33d2bbdce78e	2026-07-17	Warnings	Exact identifier application number: M001
Best Choice Extra Strength Tropical Fruit	CALCIUM CARBONATE	BEST CHOICE (VALU MERCHANDISERS COMPANY)	09e25e8e-a861-45cb-a919-36c30d3b7f7b	2026-07-17	Warnings	Exact identifier application number: M001
LEADER ULTRA STRENGTH	ANTACID CALCIUM CARBONATE	CARDINAL HEALTH 110, LLC. DBA LEADER	713c74bf-f586-4c63-82aa-5ed3a611d7a0	2026-07-17	Warnings	Exact identifier application number: M001
Best Choice Regular Strength	CALCIUM CARBONATE	BEST CHOICE (VALU MERCHANDISERS COMPANY)	a05bc8e7-ffc1-4abb-ade5-c3394a7e49bd	2026-07-17	Warnings	Exact identifier application number: M001
Fast Acting Heartburn Relief Peppermint Flavor	CALCIUM CARBONATE	Raritan Pharmaceuticals Inc	a7c5a5db-bdfe-4601-ae51-dedd81626b0d	2026-07-17	Warnings	Exact identifier application number: M001
Best Choice Extra Strength	CALCIUM CARBONATE ,MAGNESIUM HYDROXIDE	BEST CHOICE (VALU MERCHANDISERS COMPANY)	1989551d-b977-4d5e-8b01-153cd9d638fc	2026-07-17	Warnings	Exact identifier application number: M001
Best Choice Extra Strength Assorted Berry	CALCIUM CARBONATE	BEST CHOICE (VALU MERCHANDISERS COMPANY)	412a5be3-2f90-483c-8169-b733861f3aa1	2026-07-17	Warnings	Exact identifier application number: M001
Best Choice Assorted Fruit	CALCIUM CARBONATE	BEST CHOICE (VALU MERCHANDISERS COMPANY)	cd9e2e11-25a8-4096-870a-9d0269e6c7a9	2026-07-17	Warnings	Exact identifier application number: M001
Best Choice Extra Strength	SMOOTH ANTACID TABLETS	BEST CHOICE (VALU MERCHANDISERS COMPANY)	c5141eb9-d851-453e-b51c-f436a647495a	2026-07-17	Warnings	Exact identifier application number: M001
Gelfos-M	ALUMINUM PHOSPHATE, COLLOIDAL, MAGNESIUM HYDROXIDE, SIMETHICONE	Masaem Company	56b9a769-08fb-738f-e063-6294a90a9eb2	2026-07-16	Warnings	Exact identifier application number: M001
Extra Strength Gas Relief	SIMETHICONE	Shield Pharmaceuticals Corp	e62f6f6f-59a9-4df4-91ca-a76c4de93fe0	2026-07-15	Warnings	Exact identifier application number: M001
Simethicone	TARGET BERRY BLAST ANTACID HBG CHEW	Target	5245af45-77c7-c95f-e063-6294a90a24f7	2026-07-15	Warnings	Exact identifier application number: M001
Amazon Basics Cherry Antacid SC	CALCIUM CARBONATE	Amazon	4b1d6e4e-8b59-ec06-e063-6394a90aa60d	2026-07-15	Warnings	Exact identifier application number: M001
FEVIA Acid Control	CALCIUM CARBONATE	VIVUNT PHARMA LLC	4b1bd2d1-c909-f5db-e063-6394a90a84bc	2026-07-15	Warnings	Exact identifier application number: M001
FEVIA Acid Control	CALCIUM CARBONATE	VIVUNT PHARMA LLC	4d695a90-6502-3020-e063-6394a90ab0c3	2026-07-15	Warnings	Exact identifier application number: M001
GOOD NEIGHBOR PHARMACY Antacid Extra Strength	ALUMINUM HYDROXIDE AND MAGNESIUM CARBONATE	Amerisource Bergen	5e346dc0-69ce-4cc5-bb5d-bfa833e11c1f	2026-07-13	Warnings	Exact identifier application number: M001
Good Neighbor Extra Strength Assorted Fruits	CALCIUM CARBONATE	AMERISOURCE BERGEN	abf564a1-0823-433d-a023-8be4e085daf4	2026-07-13	Warnings	Exact identifier application number: M001

UNII, Preferred term, Registry number table
UNII	Preferred term	Registry number	Matched term
3A3U0GI71G	MAGNESIUM OXIDE	1309-48-4	MAGNESIUM OXIDE

DailyMed RxNorm Mappings#

RxCUI, RxNorm string, TTY table
RxCUI	RxNorm string	TTY	DailyMed	SPL version
198741	magnesium oxide 400 MG Oral Tablet	PSN	9119b7f0-3e8a-7be7-e053-2995a90a4634	13
198741	magnesium oxide 400 MG Oral Tablet	SCD	9119b7f0-3e8a-7be7-e053-2995a90a4634	13
198741	magnesium oxide 400 MG (magnesium 241.3 MG) Oral Tablet	SY	9119b7f0-3e8a-7be7-e053-2995a90a4634	13
198741	magnesium oxide 400 MG Oral Tablet	PSN	edabc9e4-60ad-407f-97c8-dfec5ee7eeb1	1
198741	magnesium oxide 400 MG Oral Tablet	SCD	edabc9e4-60ad-407f-97c8-dfec5ee7eeb1	1
198741	magnesium oxide 400 MG (magnesium 241.3 MG) Oral Tablet	SY	edabc9e4-60ad-407f-97c8-dfec5ee7eeb1	1

Packages#

Package NDC, 11-digit format, Description table
Package NDC	11-digit format	Description	Units	Marketing start	Marketing end	Sample	Exclude flag	Status
54738-973-12	54738097312	120 TABLET in 1 BOTTLE (54738-973-12)	120 tablet	2016-02-01	0000-00-00	No	No	Current

Title, Manufacturer, Effective date table
Title	Manufacturer	Effective date	Type	Version
Magnesium Oxide Tablets	Richmond Pharmaceuticals, Inc. \| Advance Pharmaceutical, Inc.	2024-12-26	HUMAN OTC DRUG LABEL	13
Magnesium Oxide Tablets	Aphena Pharma Solutions - Tennessee, LLC	2018-10-25	HUMAN OTC DRUG LABEL	1