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QCH Maximum Strength Antacid 516 aluminum hydroxide, magnesium hydroxide, simethicone 800 mg/10mL; 800 mg/10mL; 80 mg/10mL Liquid, 355 mL

by Chain Drug Marketing Association Inc. · 355 mL in 1 BOTTLE (83324-122-12)
NDC 83324-0122-12
🏷️ FDA NDC (as labeled) 83324-122-12 billing pads the product segment with a zero
OTC On market Non-controlled
🗂️ Data synced Sep 17, 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) 83324-122-12
Product NDC 83324-122
11-digit billing NDC 83324012212
NCPDP billing unit ML — per mL (volume)
RxCUI 237870
UNII 5QB0T2IUN0, NBZ3QY004S, 92RU3N3Y1O
Application # M001
SPL Set ID 1794c35a-79c5-48c2-e063-6394a90a6d29
Physiologic effect Skin Barrier Activity
DEA schedule Non-controlled
Marketing category OTC MONOGRAPH DRUG
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2024-08-28
Route ORAL
Dosage form LIQUID
Substance ALUMINUM HYDROXIDE; MAGNESIUM HYDROXIDE; DIMETHICONE
GPI-14 48991003101835
GCN Seq No 002706
GCN 63915
HICL code 001168
Ingredient (HICL) Mag Hydrox/Aluminum Hyd/Simeth
HIC1 code D
Therapeutic class — broad (HIC1) Biliary System/Gastro-Intestinal System
HIC2 code D4
Therapeutic class — intermediate (HIC2) Drugs Acting Principally On The Alimentary Tract
HIC3 code D4B
Therapeutic class — specific (HIC3) Antacids
AHFS code 56:04.00.00
AHFS class Antacids And Adsorbents
FDB label name QC ANTACID-ANTIGAS MAX STR LIQ
FDB brand name Antacid-Antigas
Legend status O — Over-the-counter (OTC) drug or device
Why two NDCs? The FDA registers this code as 83324-122-12 — 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 → 83324-0122-12. 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.

🏷️ RxNorm drug class

This medicine belongs to the Aluminium compounds class.

Drug family (ATC) Aluminium compounds
Where does this data come from?
Therapeutic classes from RxNorm RxClass (U.S. National Library of Medicine) — Established Pharmacologic Class (FDA), ATC drug family (WHO) and mechanism of action, matched by this product’s RxCUI.

🏭 Manufacturer & labeler

LabelerChain Drug Marketing Association Inc.
FDA applicationM001 (OTC MONOGRAPH DRUG)
Labeler code83324
First marketedAug 2024
Product typeHuman Otc Drug
Portfolio72 products on file
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

Label name QC ANTACID-ANTIGAS MAX STR LIQ Ingredient Mag Hydrox/Aluminum Hyd/Simeth
📖 About the active ingredient MedlinePlus · NLM
General information about the ingredient itself — the description of this specific product follows below.

Aluminum Hydroxide, Magnesium Hydroxide are antacids used together to relieve heartburn, acid indigestion, and upset stomach. They may be used to treat these symptoms in patients with peptic ulcer, gastritis, esophagitis, hiatal hernia, or too much acid in the stomach (gastric hyperacidity). They combine with stomach acid and neutralize it. Aluminum Hydroxide, Magnesium Hydroxide are available without a prescription. This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

Read the full MedlinePlus article ↗
🧪 What is this product?

QCH Maximum Strength Antacid is an over-the-counter liquid suspension taken by mouth that contains aluminum hydroxide and magnesium hydroxide, which are typically used as antacids to help neutralize stomach acid and relieve heartburn and indigestion. The product also contains simethicone (sometimes called dimethicone), which functions as an anti-gas ingredient commonly used to help reduce bloating and gas discomfort. This is an OTC monograph drug, meaning it is marketed under established FDA guidelines for antacid products rather than through individual product approval.

5
Nutrient depletion considerations

Aluminum Hydroxide, Magnesium Hydroxide, Simethicone (OTC drug) may be associated with lower levels of 5 nutrients — worth a chat with your pharmacist, not a cause for alarm.

🧪 Full Aluminum Hydroxide, Magnesium Hydroxide, Simethicone (OTC drug) nutrient depletion report →
An association is not a deficiency. Educational only — don't start or stop anything without professional guidance.
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.

  • UNII 3K9958V90M
    A liquid solvent derived from fermentation or chemical synthesis. In medicines, alcohol dissolves active ingredients, helps preserve the product, and improves how the body absorbs certain drugs.
  • UNII PDC6A3C0OX
    Glycerin is a clear, thick liquid derived from plant oils or fats. It acts as a humectant to retain moisture, a sweetener, and a solvent in medications.
  • UNII S38J6RZN16
    Hydroxyethyl cellulose is a plant-derived thickening agent made from cellulose. In medicines, it acts as a binder to hold ingredients together, a thickener to adjust product texture, and a film-former to create smooth coatings on tablets.
  • UNII A2I8C7HI9T
    Methylparaben is a preservative derived from benzoic acid that prevents growth of bacteria, fungi, and mold in medicines. It extends the product's shelf life and maintains safety during storage.
  • UNII 6DC9Q167V3
    Propylene glycol is a clear liquid derived from petroleum or vegetable sources. It acts as a solvent, humectant, and preservative in medicines, helping dissolve active ingredients and maintain product stability.
  • UNII Z8IX2SC1OH
    Propylparaben is a chemical preservative used to prevent bacterial and fungal growth in medicines and personal care products. It helps extend shelf life and maintain product safety during storage.
  • UNII SB8ZUX40TY
    Saccharin sodium is an artificial sweetener made from saccharin salt. It's added to medicines to improve taste, especially in liquid formulations for children or bitter drugs.
  • UNII 506T60A25R
    Sorbitol is a natural sugar alcohol derived from glucose. It serves as a sweetener, humectant, and bulking agent in medications to improve taste and help maintain moisture in the product.
  • UNII 059QF0KO0R
    Water is a liquid solvent that dissolves and mixes ingredients together in liquid medicines, syrups, and injections. It helps distribute the active drug evenly throughout the product.

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

The official label also statesethyl alcohol, flavor, glycerin, hydroxyethyl cellulose, methylparaben, propylene glycol, propylparaben, purified water, saccharin sodium, simethicone emulsion, sorbitol

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 mLPer package
Retail pharmacies payNADAC · weekly $0.012 $4.30 / 355 ml
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.
NADAC price history (per mL) — tap or hover for the price & month
Dec 2025 Feb 2026 May 2026 Aug 2026 $0.012 $0.012
▲ Up 3% over the last 9 months.
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
Maximum Strength Antacid 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 63868-0715-57 Chain 355 ml $0.010 — FDA listed save 14%
Almacone Double Strength 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 00536-0015-83 RUGBY 355 ml $0.012 — Availability likely —
Mintox Maximum Strength 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 00904-5725-14 MAJOR 355 ml $0.012 — Availability likely —
Antacid Antigas Nta 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 46122-0431-40 AMERISOURCEBERGEN 355 ml $0.012 — Availability likely —
Antacid Antigas Nta 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 46122-0432-40 AMERISOURCEBERGEN 355 ml $0.012 — Availability likely —
Maximum Strength Antacid 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 70000-0062-01 CARDINAL 355 ml $0.012 — Availability likely —
Maximum Strength Antacid 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 70000-0422-01 CARDINAL 355 ml $0.012 — Availability likely —
Maximum Strength Antacid Antigas 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 70677-1064-01 STRATEGIC 355 ml $0.012 — Availability likely —
Maximum Strength Antacid And Antigas 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 70677-1065-01 STRATEGIC 355 ml $0.012 — Availability likely —
QCH Maximum Strength Antacid 516 800 mg/10mL; 800 mg/10mL; 80 mg/10mLthis 83324-0122-12 Chain 355 ml $0.012 — Availability likely —
Mag-AL Plus XS 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 00121-1762-30 PAI 10 cups — — FDA listed —
Maximum Strength Antacid Antigas 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 00363-1691-12 WALGREEN 355 ml — — FDA listed —
Maximum Strength Antacid And Gas Relief 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 11822-3727-06 RITE 355 ml — — FDA listed —
Maximum Strength Antacid And Antigas 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 11822-5742-00 RITE 355 ml — — Discontinued —
Mintox Maximum Strength 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 17856-5725-03 ATLANTIC 30 ml — — FDA listed —
Antacid 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 21130-0508-05 Safeway 177 ml — — FDA listed —
Antacid Plus 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 21130-0691-12 BETTER 355 ml — — FDA listed —
Maximum Strength Antacid 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 30142-0638-12 KROGER 355 ml — — FDA listed —
Maximum Strength Antacid Mint 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 36800-0342-40 Topco 355 ml — — FDA listed —
Maximum Strength Antacid Cherry liquid 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 36800-0587-40 Topco 355 ml — — FDA listed —
maximum strength antacid cherry 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 41163-0065-05 UNITED 355 ml — — FDA listed —
Maximum Strength Antacid Cherry 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 49035-0638-12 WAL-MART 355 ml — — FDA listed —
Maximum Strength Antacid 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 49035-0681-12 WAL-MART 355 ml — — FDA listed —
Maximum Strength Antacid And Gasrelief 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 50804-0619-12 GOODSENSE 355 ml — — FDA listed —
Antacid And Gasrelief 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 50804-0638-12 GOODSENSE 355 ml — — FDA listed —
Maximum Strength Antacid 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 51316-0142-12 CVS 355 ml — — FDA listed —
Mag-Al Plus XS 2400 mg/30mL; 2400 mg/30mL; 240 mg/30mL 55154-9422-05 Cardinal 5 cups — — FDA listed —
Maximum Strength Advanced Antacid 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 55910-0638-12 DOLGENCORP, 355 ml — — FDA listed —
Aluminum Hydroxide, Magnesium Hydroxide and Simethicone 2400 mg/30mL; 2400 mg/30mL; 240 mg/30mL 57237-0324-31 Rising 100 cups — — FDA listed —
Geri-Lanta Maximum Strength 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 57896-0619-12 Geri-Care 355 ml — — FDA listed —
Geri-Mox Max Cherry 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 57896-0638-10 Geri-Care 100 cups — — FDA listed —
MAXIMUM STRENGTH Antacid 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 57896-0664-12 Geri-Care 355 ml — — FDA listed —
Aluminum Hydroxide, Magnesium Hydroxide, and Dimethicone 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 60687-0888-76 American 10 cups — — FDA listed —
Mylanta Maximum Strength Classic Flavor 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 62372-0500-12 Infirst 355 ml — — FDA listed —
Mylanta Maximum Strength Vanilla Caramel Flavor 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 62372-0504-12 Infirst 355 ml — — FDA listed —
Maximum Strength Antacid And Antigas 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 63941-0619-12 VALU 355 ml — — FDA listed —
Maximum Strength Antacid And Antigas Cherry 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 63941-0638-12 VALU 355 ml — — FDA listed —
Geri-Lanta Maximum Strength 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 68071-3423-01 NuCare 355 ml — — FDA listed —
Mintox Maximum Strength 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 68071-4114-01 NuCare 355 ml — — FDA listed —
Maximum Strength Antacid Cherry 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 69256-0508-40 Harris 355 ml — — FDA listed —
Maximum Strength Antacid 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 69256-0517-05 Harris 355 ml — — FDA listed —
Maximum Strength Antacid Mint 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 69842-0296-73 CVS 355 ml — — FDA listed —
Antacid 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 69842-0508-05 CVS 355 ml — — FDA listed —
Maximum Strength Antacid 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 69842-0619-12 CVS 355 ml — — FDA listed —
Maximum Strength Antacid Cherry 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 69842-0683-12 CVS 355 ml — — Discontinued —
Mintox Maximum Strength 400 mg/5mL; 400 mg/5mL; 40 mg/5mL 71205-0515-35 Proficient 355 ml — — FDA listed —
Antacid 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 72476-0516-05 Retail 355 ml — — FDA listed —
Maximum Strength Antacid and Antigas 800 mg/10mL; 800 mg/10mL; 80 mg/10mL 79481-0638-01 Meijer, 355 ml — — FDA listed —
Kesin MAG-AL Plus XS 40 mg/5mL; 400 mg/5mL; 400 mg/5mL 81033-0007-01 Kesin 100 cups — — FDA listed —
Aluminum Hydroxide, Magnesium Hydroxide and Simethicone 2400 mg/30mL; 2400 mg/30mL; 240 mg/30mL 84415-0010-01 Everpharm 100 cups — — 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

🏛️
2024
On the market since
Aug 2024
📍
2026
Currently FDA-listed
2 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.

🔬 Reported adverse events (FAERS)

Read carefully: FAERS reports are voluntary and unverified. Counts are not incidence, do not establish causation, are subject to reporting bias, and cannot be used to compare one drug to another. Shown for signal context only. Reports for QCH Maximum Strength Antacid 516 (this brand).

Top reported reactions

Electrocardiogram Qt Prolonged4
Drug Interaction2
Drug Level Increased2
Schizoaffective Disorder2
Abdominal Discomfort1
Abdominal Distension1
Abdominal Pain1

Reporter sex

0 reports

Serious outcomes

Disabling1
Death1
Reports over time (by year) — tap or hover for the count & year
2021 2022 2024 2026 1 0
Most recent year is provisional (FAERS lags ~3 months).
Where does this data come from?
Adverse-event reports from the FDA Adverse Event Reporting System (FAERS) via openFDA. FAERS reports are voluntary and unverified — counts are not incidence and don’t establish causation.

📦 Packaging — all sizes for this product

Package NDCDescription Marketing startStatus
83324-0122-12 You're viewing this 355 mL in 1 BOTTLE (83324-122-12) 2024-08-28 Active

📄 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 ▾

USE(S) relieves: acid indigestion heartburn sour stomach upset stomach and gas associated with these symptoms

⏱️ Dosage and Administration 38 words ▾

DIRECTIONS shake well before use adults and children 12 years and older: take 10 mL - 20 mL two times a day, or as directed by a doctor children under 12 years: consult a doctor mL = milliliter

⚠️ Warnings 34 words ▾

WARNINGS Do not take more than 60 mL 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 doctor.

📦 Storage and Handling 19 words ▾

OTHER INFORMATION each 10 mL contains: magnesium 340 mg, sodium 5 mg store at 20ºC-25ºC (68º-77ºF) do not freeze

🧪 Active Ingredient 23 words ▾

ACTIVE INGREDIENTS (in each 10 mL ) Aluminum hydroxide (equiv. to dried gel, USP) 800 mg Magnesium hydroxide 800 mg Simethicone 80 mg

🧪 Inactive Ingredients 19 words ▾

INACTIVE INGREDIENTS ethyl alcohol, flavor, glycerin, hydroxyethyl cellulose, methylparaben, propylene glycol, propylparaben, purified water, saccharin sodium, simethicone emulsion, sorbitol

🎯 Purpose 4 words ▾

PURPOSE Antacid Antacid Antigas

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗
← 83324-0121-12 · Chain 83324-0125-12 · Chain →
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.