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Stomachin Antacid magnesium carbonate and sodium bicarbonate 58 mg/g; 809 mg/g Powder — NDC 43337-9329-09 package photo

Stomachin Antacid magnesium carbonate and sodium bicarbonate 58 mg/g; 809 mg/g Powder

by Chang Kuo Chou Pharmaceutical Co., Ltd. · 20 PACKET in 1 BOX (43337-9329-9) / 2 g in 1 PACKET
NDC 43337-9329-09
🏷️ FDA NDC (as labeled) 43337-9329-9 billing pads the package segment with a zero
This package
Contains2 g in 1 packet Pack sizes3 compare ↓
Also comes in: 95 g 43337-9329-07 450 g 43337-9329-08
OTC On market Non-controlled
🗂️ Data synced Jul 24, 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

🆔 Identity & classification

FDA NDC (as labeled) 43337-9329-9
Product NDC 43337-9329
11-digit billing NDC 43337932909
UNII 0E53J927NA, 8MDF5V39QO
Application # M001
SPL Set ID 60fa0650-8785-4cb3-8f88-1a437296252f
Mechanism of action Alkalinizing Activity
DEA schedule Non-controlled
Marketing category OTC MONOGRAPH DRUG
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2009-04-30
Route ORAL
Dosage form POWDER
Substance MAGNESIUM CARBONATE; SODIUM BICARBONATE
Why two NDCs? The FDA registers this code as 43337-9329-9 — a 5-4-1 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 package segment → 43337-9329-09. 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.

🏭 Manufacturer & labeler

LabelerChang Kuo Chou Pharmaceutical Co., Ltd.
FDA applicationM001 (OTC MONOGRAPH DRUG)
Labeler code43337
First marketedApr 2009
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.

🩺 Clinical

🧪 What is this product?

Stomachin Antacid is an over-the-counter powder taken by mouth that contains magnesium carbonate and sodium bicarbonate. These ingredients are alkaline salts commonly used in antacid products to help neutralize stomach acid. This product is marketed as an OTC monograph drug, meaning it follows established FDA rules for antacid formulations rather than being individually reviewed by the FDA.

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.

🧪 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.

  • 29 mg / 1 g UNII K48IKT5321
    A plant extract from clove buds used as a flavoring agent and natural fragrance in medications. It adds taste and aroma to improve how the medicine smells and tastes.
  • 86 mg / 1 g UNII 61ZBX54883
    Licorice is a natural extract from the licorice plant root. It's used in medicines as a flavoring agent to mask bitter tastes and improve how the medicine tastes.
  • 4 mg / 1 g UNII L7T10EIP3A
    A cooling compound from mint plants used as a flavoring agent and to create a fresh sensation in medicines. It helps mask bitter tastes and improve how the product feels in the mouth.
  • 14 mg / 1 g UNII G280W4MW6E
    Rhubarb is a plant extract used as a natural colorant and flavoring agent in medicines. It provides a distinctive color and taste to make the medication more appealing.

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

The official label also statesclove, licorice, menthol, rhubarb

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.

💲 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 gPer 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.
Try another pack size: 95 g 450 g
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.

🔁 Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Stomachin Antacid 58 mg/g; 809 mg/gthis 43337-9329-09 Chang 20 packets — — FDA listed —
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

🏛️
2009
On the market since
Apr 2009
📍
2026
Currently FDA-listed
17 years listed
🔒
·
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.

📦 Packaging — all sizes for this product

Package NDCDescription Marketing startStatus
43337-9329-07 95 g in 1 CAN (43337-9329-7) 2009-04-30 Active
43337-9329-08 450 g in 1 CAN (43337-9329-8) 2009-04-30 Active
43337-9329-09 You're viewing this 20 PACKET in 1 BOX (43337-9329-9) / 2 g in 1 PACKET 2009-04-30 Active

Pack size FAQ

What quantity is in NDC 43337-9329-09?
NDC 43337-9329-09 is listed by the FDA — 20 packet in 1 box / 2 g in 1 packet.
What NDC number is used to bill for this package of Stomachin Antacid magnesium carbonate and sodium bicarbonate 58 mg/g; 809 mg/g Powder?
Bill NDC 43337-9329-09 — the 11-digit billing format is 43337932909. Pharmacy and medical claims use the 11-digit form; the FDA label may print a shorter form of the same code.

🧭 About this NDC listing & data coverage

Over-the-counter (OTC) product
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 Drug". 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.
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 FDA registers it as 43337-9329-9, which is what is printed on the packaging and shown on DailyMed. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero: 43337-9329-09, written without dashes as 43337932909. The Identity section at the top of this page lists every form of this code.
What do the three segments of this NDC mean?
In 43337-9329-09, the first segment (43337) is the labeler code FDA assigned to Chang Kuo Chou Pharmaceutical Co., Ltd.; the middle segment (9329) identifies this specific product — its ingredient, strength, and dosage form; and the last segment (09) identifies this exact package size and type. Together they name one specific package of one specific product.
Is this package still being marketed?
Yes, per the latest FDA NDC Directory data on this page: this package is listed as actively marketed, with no marketing end date reported by Chang Kuo Chou Pharmaceutical Co., Ltd.. Listing status can change — the directory data on this page refreshes weekly.
Does this product come in other package sizes?
Yes — the FDA directory lists 2 other package presentations of this same product, including 95 g (43337-9329-07), 450 g (43337-9329-08). Each has its own NDC and its own page — see the package list near the top of this page.
Who lists this product with the FDA?
Chang Kuo Chou Pharmaceutical Co., Ltd. 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.

📄 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 📦 Storage and Handling 🧪 Active Ingredient 🧪 Inactive Ingredients 🎯 Purpose
🎯 Indications and Usage 15 words ▾

Uses relieves: acid indigestion heartburn sour stomach upset stomach from overindulgence in food or drink

⏱️ Dosage and Administration 12 words ▾

Directions Take 2 gram (one packet) with water, 3 times a day

⚠️ Warnings 101 words ▾

Warnings Allergy alert Do not use if you are allergic to the antacid. Do not use more than 3 packets in a 24-hour period, or use the maximum dosage of this product for more than 2 weeks, except under the advice and supervision of a physician. Ask a doctor or pharmacist before use if you are presently taking a prescription drug.

Antacid may interact with certain prescription drugs. On magnesium or sodium restricted diet. Stop use and ask a doctor if symptoms persist or worsen.

If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children.

📦 Storage and Handling 19 words ▾

Other information each gram contains : magnesium 16 mg and sodium 221 mg store at cool and dry place

🧪 Active Ingredient 14 words ▾

Active ingredients (in each gram) Purpose Magnesium carbonate 58mg Antacid Sodium bicarbonate 809mg Antacid

🧪 Inactive Ingredients 6 words ▾

Inactive ingredients clove, licorice, menthol, rhubarb

🎯 Purpose 14 words ▾

Active ingredients (in each gram) Purpose Magnesium carbonate 58mg Antacid Sodium bicarbonate 809mg Antacid

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗
← 43319-0074-11 · Zero 43347-0158-01 · Derma →
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.