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Magnesium Oxide 241.3 mg/1000mg Tablet, 120 mg — NDC 83335-0001-12 package photo
Label image from the product's FDA listing (DailyMed) — may show a different pack size or an older label revision.

Magnesium Oxide 241.3 mg/1000mg Tablet, 120 mg — NDC 83335-001-12 (Billing 83335-0001-12)

by Wittman Pharma, Inc. · 120 mg in 1 BOTTLE, PLASTIC

This is a package of 120 mg of Magnesium Oxide 241.3 mg/1000mg Tablet from Wittman Pharma, Inc., no longer marketed, no longer in the FDA NDC Directory. It is this product's only package size.

NDC 83335-0001-12
🏷️ FDA NDC (as labeled) 83335-001-12 billing pads the product segment with a zero
OTC Discontinued Non-controlled ⚠ Inactivated by FDA ⇄ Compare with another NDC
🗂️ FDA directory synced Oct 1, 2026 · this listing last changed Jul 27, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →

This page is curated, coded, and maintained by

Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

NDC database record

One package, one record: these facts belong to NDC 83335-001-12 alone.

Record
FDA NDC Directory package listing · Human OTC drug
Code segments
83335 labeler · 001 product · 12 package
Barcode (UPC-A, from the NDC)
3 8333500112 7
FDA record last changed
Jul 27, 2026
⚠️
Excluded from the active FDA NDC Directory. FDA inactivated this product’s listing record, so it is excluded from the active NDC Directory. The listing was last certified through Dec 2025. A label may still appear on DailyMed, but the NDC is no longer in the current FDA NDC Directory. Search the FDA NDC Directory ↗

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

FDA NDC (as labeled) 83335-001-12
Product NDC 83335-001
11-digit billing NDC 83335000112
Application # part331
SPL Set ID f7064d17-04b1-160b-e053-6394a90ad8be
Established class (EPC) 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
DEA schedule Non-controlled
Marketing category OTC MONOGRAPH FINAL
Marketing status Discontinued
FDA listing status Inactivated by FDA (certified through Dec 2025)
Route ORAL
Dosage form TABLET
Substance MAGNESIUM OXIDE

Drug-database identifiers Medi-Span GPI and First Databank GCN / HICL / AHFS classification

GPI-14 48400020000310
Quick answers
  • GPI-14 (Medi-Span): 48400020000310
Why two NDCs? The FDA registers this code as 83335-001-12 — a 5-3-2 layout, and that's what's printed on the package and shown on DailyMed. For insurance claims, every NDC is standardized to a uniform 11-digit 5-4-2 format by adding a zero to the product segment → 83335-0001-12. Same drug, same package — only the format differs.
Where does this data come from?
Identifiers from the FDA openFDA NDC Directory and Structured Product Labeling; RxCUI from RxNorm (NLM); GPI from Medi-Span; GCN / HIC / AHFS / legend from First Databank.

Clinical

📗 Our plain-language guide HelloPharmacist
  • It's used to relieve acid indigestion and upset stomach. Some products, like Magnesium Oxide 400mg, are also used as a magnesium supplement. Check which use your product is labeled...
  • For antacid use, the labels say 1 tablet twice a day or as directed by your doctor. For supplement use, the directions vary by product, from 1 tablet daily to 1 to 2 tablets daily....
  • The dietary supplement tablet suggests taking it preferably with food. The other labels don't give a food instruction, so follow what's on your package or what your prescriber tell...
  • The main one is a laxative effect, meaning looser or more frequent stools. If that bothers you or you're using more than the label allows, check in with your doctor or pharmacist.
📖 Read our full Magnesium Oxide guide →

Supplement & herbal interactions

🌿 Drug–supplement interaction checker →
Where does this data come from?
Plain-language summary from MedlinePlus (U.S. National Library of Medicine); supplement & herbal interactions and nutrient depletion data from the Natural Medicines database; our full guide is HelloPharmacist editorial content.

Pricing

A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.

Price systemPer eachPer package
Retail pharmacies payNADAC · weekly Not in the retail survey — common for institutional, discontinued, or low-volume packs.
Medicaid paysCMS SDUD · 12 mo No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data.
Medicare drug plans payPart D · quarterly No Part D plan price is available for this NDC in our data.
ℹ️
No price is published for this exact package yet. CMS surveys NADAC per package size, so a different pack of the same drug often has one.
Where does this data come from?
NADAC (National Average Drug Acquisition Cost) is the CMS weekly pharmacy-acquisition-cost survey — what pharmacies pay. ASP (Average Sales Price) is the CMS Medicare Part B drug-payment file, published quarterly. Medicaid pays is computed by us from CMS State Drug Utilization Data (total reimbursed ÷ units, trailing 12 months) — gross of rebates and inclusive of dispensing fees, so it reflects what Medicaid paid, not an acquisition cost. Medicare drug plans pay is the median negotiated point-of-sale unit cost across plans listing this NDC in the CMS quarterly Prescription Drug Plan pricing files, before rebates. The VA pays is the federal contract price (FSS, and the statutory Big 4 ceiling where listed) from the VA National Acquisition Center pharmaceutical price file. All are free public government data; each measures a different payer, so the figures are not directly comparable.

Packaging — all sizes for this product

Package NDCDescription Marketing startMarketing endStatus
83335-0001-12 You're viewing this Main listing 120 mg in 1 BOTTLE, PLASTIC 2023-03-16 — Inactivated by FDA

Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Magnesium Oxide 241.3 mg/1000mgthis 83335-0001-12 Wittman 120 mg — — Discontinued —
About this product: other versions of the same ingredient, strength and form are listed above, least expensive first, with FDA equivalence ratings where available.
Where does this data come from?
Equivalents are other NDCs of the same ingredient, form and route from the openFDA NDC Directory, ranked least-expensive-first by NADAC. Therapeutic-equivalence (AB) ratings come from the FDA Orange Book; biologics use the FDA Purple Book for biosimilar & interchangeable status.

Availability & generic status

📍
2026
Currently FDA-listed
listed with the FDA
🔒
·
No generic listed yet
brand only
ℹ️No FDA-approved generic found

We did not find an FDA-approved generic match for this exact strength, form and route.

Where does this data come from?
Patents and exclusivity from the FDA Orange Book (small-molecule drugs), refreshed from public FDA data. Generic launch timing is an estimate, not a guarantee.

What it looks like

Color white
ShapeRound
ImprintMG
Size4 mm
One label can cover several strengths, so colors may be combined — always confirm a loose pill against the dispensed prescription label or a pharmacist.
Where does this data come from?
Physical description (imprint, shape, color, scoring, coating) from this product’s FDA Structured Product Labeling (SPL), mirrored from DailyMed / openFDA.

Inactive Ingredients / Excipients

Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.

💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.

  • UNII OP1R32D61U
    Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
  • UNII 5856J3G2A2
    A starch-based powder made from potatoes and processed with sodium. It acts as a disintegrant, helping the tablet or capsule break apart quickly in the stomach so the medicine can be absorbed.
  • UNII 4ELV7Z65AP
    Stearic acid is a fatty acid derived from plant or animal sources. It acts as a binder and lubricant in tablets and capsules, helping them hold together and flow smoothly during manufacturing.

3 inactive ingredients listed in the exact product block matched to this NDC.

The official label also statesMicrocrystaline Cellulose, Sodium Starch Glycolate, Stearic Acid

Label-section wording can be broader than the structured product block and may mention additional formulation ingredients.

Where does this data come from?
Data sourced from official FDA Structured Product Labeling (SPL) via DailyMed — ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.

Inactive ingredient FAQ

Are inactive ingredients the same for every manufacturer?
No. Inactive ingredients can differ by manufacturer, dosage form, strength, and package / product version.
Why might an inactive ingredient be missing?
Some SPLs do not provide a complete structured inactive-ingredient list, and older or unusual labels may only include the information in narrative text.
Can inactive ingredients matter?
Yes. They can matter for allergies, intolerances, dyes, gluten / lactose concerns, preservatives, and formulation differences — but confirm with a pharmacist or the manufacturer when it’s clinically important.

Manufacturer & labeler

LabelerWittman Pharma, Inc.
FDA applicationpart331 (OTC MONOGRAPH FINAL)
Labeler code83335
Product typeHuman Otc Drug
The labeler markets the product; the application holder owns the FDA approval. They’re often the same company but can differ (e.g. a repackager or an authorized generic). A mailing address / phone appears here when the manufacturer includes it in the product’s FDA label (not all do).
Where does this data come from?
Labeler, application holder and registered establishment from the FDA openFDA NDC Directory and Drugs@FDA; address/contact from the product’s FDA label.

FDA label — Drug Facts FDA SPL

The complete FDA label for this product — the official Drug Facts labeling, verbatim, section by section. Jump with a chip, search within the label, or expand everything.
🎯 Indications and Usage ⏱️ Dosage and Administration ⚠️ Warnings 🧪 Active Ingredient 🧪 Inactive Ingredients 🎯 Purpose 📄 Keep Out of Reach of Children 📄 Package Label / Principal Display Panel
🎯 Indications and Usage 6 words ▾

relieves acid indigestion and upset stomach

⏱️ Dosage and Administration 15 words ▾

Tablet taken Orally Do not take more than 2 tablets in a 24 hour period

⚠️ Warnings 32 words ▾

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

🧪 Active Ingredient 13 words ▾

Active Ingredient (in each tablet) Magnesium Oxide 400 mg (241.3 mg Elemental Magnesium)

🧪 Inactive Ingredients 7 words ▾

Microcrystaline Cellulose, Sodium Starch Glycolate, Stearic Acid

🎯 Purpose 1 words ▾

Antacid

📄 Keep Out of Reach of Children 6 words ▾

Keep out of reach of children

📄 Package Label / Principal Display Panel 128 words ▾

Drug Facts ACTIVE INGREDIENT (In each tablet) Magnesium Oxide 400mg (241.3mg elemental magnesium) Purpose Antacid USES 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. Do not take more than 2 tablets in a 24 hour period.

May have a laxative effect. 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 Magnesium content per tablet: 241.3mg store at room temperature 59°- 86° F (15°- 30°C) INACTIVE INGREDIENTS microcrystalline cellulose, sodium starch, glyocolate, stearic acid Questions? 1-352-549-9917 M-F 9am - 5pm EST Mag Label

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗

About this NDC listing & data coverage

Over-the-counter (OTC) product No longer marketed (per FDA listing data)
What data is (and isn’t) available for this NDC — tap to expand
NDC identity (package / product / labeler codes) ✓ Available
Labeler ✓ Available
Product & package description ✓ Available
Marketing category & status ✓ Available
Active ingredient / dosage form / route ✓ Available
FDA label (SPL via DailyMed) ✓ Available
Package photos ✓ Available
Inactive ingredients (structured) ✓ Available
NADAC pharmacy acquisition price (CMS) — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey.
Orange Book / therapeutic-equivalence data — Not published for this NDC Applies only to products approved under an NDA/ANDA; many listings are out of scope.
HCPCS J-code billing crosswalk — Not published for this NDC Most self-administered / retail products have no J-code — that is normal.
Medicaid utilization (CMS SDUD) — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold.
“Not published” reflects what the public FDA / CMS / NLM sources provide for this exact package code — it is a property of the data feeds, not a judgment about the product.

Questions about this listing

Is this NDC FDA-approved?
An NDC listing does not by itself establish FDA approval — the NDC Directory records that a product is listed with FDA, not that it was reviewed and approved. This listing's marketing category is "Otc Monograph Final". Products approved under an application carry an NDA, ANDA, or BLA number.
Why is there no price listed?
The pricing shown on our NDC pages comes from CMS NADAC, a voluntary survey of retail community pharmacy invoices. CMS does not publish a NADAC for every NDC — packages outside the retail survey (institutional and hospital products, bulk packages, discontinued items, and many OTC items) may never receive one. A missing price reflects the survey's scope, not this product's actual cost, and does not mean the product is free or unavailable.
What does the discontinued status mean for this NDC?
The labeler reported a marketing end date (or the listing was delisted), so this specific package is no longer actively marketed. Remaining stock may still be dispensed for a time, and the NDC stays valid for historical records and claims — but data feeds (pricing, labeling) typically stop updating for it. Other package sizes or other manufacturers' versions of the same medication may still be marketed — see the equivalents section where available.
Is the NDC printed on the package the same as the 11-digit billing NDC?
Yes, they identify this exact package in different formats. The form printed on the packaging and shown on DailyMed is the one the FDA registered. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero and the dashes are dropped. The Identity section at the top of this page lists each form of this code.
Who lists this product with the FDA?
Wittman Pharma, Inc. is the labeler of record for this NDC — the company under whose FDA-assigned code the package is listed. The labeler may be the manufacturer itself or a distributor marketing the product under its own code.
Do I need a prescription for this product?
This NDC is listed with FDA as an over-the-counter product, so it does not require a prescription. Follow the package directions, and ask your pharmacist if you are unsure whether it is right for you.
This page identifies an FDA-listed package (the NDC) and reports public regulatory and pricing data about the listing. It is reference information, not a medical recommendation — talk to your pharmacist or prescriber about your own medication.
Where does this data come from?
Listing facts (marketing category, packager status, marketing dates) from the FDA openFDA NDC Directory; label availability from DailyMed; pricing coverage from CMS NADAC; equivalence scope from the FDA Orange Book.
← 83326-0004-03 · Personal 83336-0391-02 · YAY →
For educational and professional reference only — not medical advice. Pricing reflects published NADAC and CMS ASP (free public data) and may differ from your acquisition cost; always verify before billing or dispensing.