FDA-filed SPL labeling · retrieved through openFDA

Magnesium Hydroxide

Magnesium hydroxide is an over-the-counter mineral compound used across many products to relieve occasional constipation and, in some formulations, to treat heartburn, acid indigestion, and sour stomach.

Brand names Milk of MagnesiaPedia-LaxPedia-Lax ChewablePhillips Milk of MagnesiaMirafast +11 more
Drug classes ⓘ Calculi Dissolution Agent
OTC Forms 6 Route Oral
Dr. Brian Staiger, PharmD, BCPS
Reviewed by Last reviewed Jul 10, 2026
🧬 Where this information comes from Click to expand

The clinical label records used on this page are FDA-filed Structured Product Labeling (SPL) retrieved through openFDA. We identified 91 clinical label sets within the page’s selected clinical scope after exact ingredient or ingredient-combination matching and applicable route/form matching. Forms, routes, brands, labelers, strengths, and NDC product-record counts are built separately from matching FDA National Drug Code Directory records. The linked DailyMed document is a representative official source for verification, not the page’s only clinical source. View the linked label on DailyMed →

At a glance
Linked label effectiveAug 14, 2026
Clinical labels in scope ⓘ91
AvailabilityOTC
Earliest approval/marketing year ⓘ1979
FDA-listed product records ⓘ282
Boxed warningNone found in compared labels
How we combine label and product data →
✓No current FDA shortage listed · checked Oct 1, 2026
⭐ Magnesium Hydroxide at a glance The quick version — the full detail is in the Patient Information Guide below.
💊
HelloPharmacist Editorial Team Bottom Line
Magnesium hydroxide is a widely available over-the-counter option for occasional constipation, and certain Milk of Magnesia products also relieve heartburn and acid indigestion. It works within half an hour to 6 hours, but it's meant for short-term use only — if you're reaching for a laxative regularly or have kidney disease, talk to your doctor or pharmacist first.
How we write & review this content — our editorial policy →

📖 Magnesium Hydroxide: Patient Information Guide

A plain-language walkthrough of Magnesium Hydroxide — what it treats, how it works, how it’s taken, side effects, warnings and interactions. Tap any section to expand it.

What Magnesium Hydroxide is used for

▾

Magnesium hydroxide is used across many over-the-counter products as a laxative and, in some formulations, as an antacid. Here's the full picture of supported uses:

  • Occasional constipation (laxative use): Supported by all magnesium hydroxide products in this family — including Dulcolax liquids and chewables, Colace Fast-Acting Saline Laxative capsules, MiraFAST and MiraFAST KIDS soft chews, CareOne Milk of Magnesia liquids, Gentle Laxative, CVS Magnesium Hydroxide Laxative Chew, CVS Health Childrens, Childrens Oral Saline Laxative, Milk of Magnesia liquids, suspensions, and concentrates, and Humco Milk of Magnesia. A bowel movement is generally produced within ½ to 6 hours (30 minutes to 6 hours for Colace Fast-Acting Saline Laxative capsules).
  • Heartburn (antacid use): Supported by Milk of Magnesia suspension, Milk of Magnesia Concentrate suspension, and Humco Milk of Magnesia suspension.
  • Sour stomach (antacid use): Supported by Milk of Magnesia suspension, Milk of Magnesia Concentrate suspension, and Humco Milk of Magnesia suspension.
  • Acid indigestion (antacid use): Supported by Milk of Magnesia suspension, Milk of Magnesia Concentrate suspension, and Humco Milk of Magnesia suspension.
  • Upset stomach associated with heartburn, sour stomach, or acid indigestion: Supported by Milk of Magnesia suspension.

How Magnesium Hydroxide is taken (dosage)

▾

How you take magnesium hydroxide depends on your specific product — doses and instructions vary by form, brand, and age group. Always follow the directions on your product's label or your doctor's guidance.

  • Liquids and suspensions: Shake well before each use. Take with a full 8-ounce glass of liquid. Can be taken as a single daily dose (often at bedtime) or in divided doses throughout the day. Do not exceed the maximum recommended daily dose in any 24-hour period.
  • Chewable tablets and soft chews: Chew thoroughly and follow with a full 8-ounce glass of liquid. May be taken as a single daily dose or in divided doses.
  • Capsules (Colace Fast-Acting Saline Laxative): Follow the product label; expect a bowel movement in 30 minutes to 6 hours.
  • For laxative use, do not use for more than 1 week without a doctor's guidance. For antacid use (in suspension products that support it), do not use the maximum dose for more than 2 weeks without medical supervision.

Magnesium Hydroxide side effects in detail

▾

Magnesium hydroxide's most common effects are related to its action in the gut.

  • Laxative effect — loose stools or diarrhea
  • Stomach cramping or discomfort
  • Nausea

Stop use and contact your doctor right away if you notice rectal bleeding or if you have no bowel movement after use — these could signal a more serious condition. If you've taken too much, contact a Poison Control Center or seek emergency care immediately.

Magnesium Hydroxide warnings and precautions

▾
  • Kidney disease: People with kidney disease should not use magnesium hydroxide products without a doctor's approval. The kidneys are responsible for clearing magnesium from the body, and impaired kidneys may allow it to build up to harmful levels.
  • Magnesium-restricted diet: If you've been told to limit magnesium intake, check with your doctor before use.
  • Short-term use only: As a laxative, do not use for more than 1 week without medical guidance. As an antacid (for products with that use), do not use the maximum dose for more than 2 weeks without a doctor's supervision.
  • Do not use the laxative if you have abdominal pain, nausea, or vomiting, or if you've had a sudden change in bowel habits lasting more than 2 weeks — see a doctor first.
  • Pregnancy and breastfeeding: Ask a health professional before use.
  • Children: Age cut-offs vary by product — some products are not appropriate for children under 2, 4, or 6 years of age without a doctor's guidance. Always check your specific product label.

Magnesium Hydroxide interactions: what it interacts with

▾

Magnesium hydroxide can interact with some medications, so check with your pharmacist or doctor before combining it with anything you're already taking.

  • Prescription drugs (laxative use): This product may interact with certain prescription medications — ask your doctor or pharmacist before use if you take any prescription drug.
  • Prescription drugs (antacid use, for suspension products): Antacids can affect how some prescription drugs are absorbed in your body — always check with your pharmacist before combining antacid forms of magnesium hydroxide with prescription medicines.

This is not a complete list of interactions. Always talk with your doctor or pharmacist before starting, stopping, or changing any medication.

Before taking Magnesium Hydroxide

▾
  • Tell your doctor if you have kidney disease — magnesium can build up in the body if your kidneys aren't working well.
  • Tell your doctor if you follow a magnesium-restricted diet.
  • Do not use the laxative form if you currently have abdominal pain, nausea, or vomiting without speaking to a doctor first.
  • See a doctor before using a laxative if you've had a sudden change in bowel habits lasting more than 2 weeks.
  • Ask a health professional before use if you are pregnant or breastfeeding.
  • Children: Age requirements vary — for some products, children under 2, 4, or 6 years of age should not use the product without a doctor's recommendation. Check your specific label.
  • Check with your doctor or pharmacist if you take any prescription medications, since magnesium hydroxide products can interact with certain drugs.

Magnesium Hydroxide overdose: if you take too much

▾

If you think you or someone else has taken too much magnesium hydroxide, get medical help right away or call a Poison Control Center immediately. Keep this product out of reach of children to prevent accidental ingestion.

How to store Magnesium Hydroxide

▾

store at room temperature, 20° - 25°C (68° - 77°F). Avoid freezing.

📄 Written from Magnesium Hydroxide’s FDA-approved label information, summarized in plain language with AI, and reviewed by our pharmacy team before publication. Every point is grounded in that labeling — nothing is invented. How we use AI →

🩺 Magnesium Hydroxide: pharmacist answers to common questions

Quick, plain-English answers to the questions patients ask most about Magnesium Hydroxide — the kind of thing our pharmacy team would talk through with you at the counter.

What is magnesium hydroxide actually used for?

▾
It depends on the product you pick up. Most magnesium hydroxide products — like Dulcolax liquid, Colace Fast-Acting Saline Laxative, MiraFAST soft chews, and many Milk of Magnesia liquids — are used to relieve occasional constipation. You can generally expect a bowel movement within half an hour to 6 hours. Some Milk of Magnesia suspension products also work as an antacid, helping with heartburn, sour stomach, and acid indigestion. Check the label of your specific product to see which uses it's approved for.

How should I take it — does it matter when or how I drink it?

▾
Yes, a few things matter here. If you're taking a liquid or suspension, shake it well before every use. Whatever form you take, follow it with a full 8-ounce glass of water or another liquid — that helps it work. For the laxative, taking your dose at bedtime is a common approach so you're ready for a bowel movement in the morning. You can also split the dose throughout the day. Just don't go over the maximum daily amount listed on your product, and use the measuring cup that comes with liquid products for accuracy.

How long can I keep using this?

▾
Magnesium hydroxide is meant for short-term, occasional use. For constipation relief, don't use it for more than 1 week without talking to your doctor — regular reliance on a laxative can be a sign of something worth checking out. If you're using a Milk of Magnesia product as an antacid, don't use the maximum dose for more than 2 weeks without medical supervision. If things aren't improving, or if you notice rectal bleeding or no bowel movement after using it, stop and call your doctor.

I have kidney disease — is it safe for me to use?

▾
You should check with your doctor before using any magnesium hydroxide product if you have kidney disease. Your kidneys normally filter magnesium out of your body, so if they're not working at full capacity, magnesium can build up to levels that cause problems. The same caution applies if you've been told to follow a low-magnesium diet. It's a quick call to your doctor or pharmacist — don't skip it.

Can I give this to my child?

▾
Some magnesium hydroxide products are made for children, but age limits vary a lot by product. Some are approved for kids as young as 2, others say to ask a doctor for children under 4 or under 6. Always read the label for your specific product. If your child is under 2, consult a doctor before giving any form of magnesium hydroxide. And if your child has rectal bleeding or doesn't have a bowel movement within 6 hours, stop use and call your doctor right away.

Does it interact with my other medications?

▾
It can. Magnesium hydroxide — especially in its antacid form — may affect how some prescription drugs are absorbed by your body. Before you use it, let your pharmacist know what prescription medications you're on. They can quickly check for any interactions. It only takes a minute and can save you from a problem.

Is Magnesium Hydroxide available over the counter?

▾
Yes — Magnesium Hydroxide is available over the counter (without a prescription) in at least some forms, according to its FDA labeling. Follow the package directions and ask your pharmacist if you're unsure which product is right for you.

When was Magnesium Hydroxide first available?

▾
Magnesium Hydroxide has been available in the United States since at least 1979, based on FDA approval history (Drugs@FDA) and product marketing records.

Who makes Magnesium Hydroxide?

▾
Magnesium Hydroxide is supplied by 78 manufacturers listed in the FDA NDC Directory, including Chattem, Inc., Strategic Sourcing Services Llc, SPI Pharma, Inc..

💬 Answers drafted from Magnesium Hydroxide’s FDA-approved label information, summarized in plain language with AI, and reviewed by our pharmacy team before publication. Grounded in that labeling — nothing is made up. How we use AI →

🧰 More about Magnesium Hydroxide on HelloPharmacist

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💊 Magnesium Hydroxide forms and strengths (how it comes)

Magnesium Hydroxide is available in 6 forms. Different forms and brands can have different approved uses, doses, schedules, and directions. Follow the instructions for your exact product, and do not switch forms without guidance from your prescriber or pharmacist.

Oral suspension

By mouth
Brands Equaline milk of magnesia Milk of Magnesia Milk of Magnesia cherry Milk of Magnesia Concentrate Milk of Magnesia Mint Milk Of Magnesia Original Sunmark Milk Of Magnesia Original
How this form is used
What it may be used for
  • Milk of Magnesia (suspension): relieves heartburn, sour stomach, acid indigestion, and upset stomach as an antacid; also relieves occasional constipation as a laxative
  • Humco Milk of Magnesia: helps relieve acid indigestion, heartburn and sour stomach as an antacid; also for temporary relief of occasional constipation
  • Milk of Magnesia Concentrate: relieves heartburn, upset/sour stomach, and acid indigestion as an antacid; relieves occasional constipation as a laxative
  • Equaline milk of magnesia, Milk of Magnesia cherry, Milk of Magnesia Mint: relieve occasional constipation, generally producing a bowel movement in ½ to 6 hours
Important instructions
  • All suspension forms: shake well before use; drink a full 8 oz glass of liquid with each laxative dose
  • Milk of Magnesia Concentrate (antacid use): do not exceed 20 mL in a 24-hour period; can be taken with water
  • Humco Milk of Magnesia (laxative): adults and children 12 and older take 1 to 4 tablespoonfuls followed by a full glass of water; children 6–11 take 1 to 2 tablespoonfuls
  • Dose may be taken once a day preferably at bedtime, in divided doses, or as directed by a doctor; do not exceed the maximum daily dose in a 24-hour period
Available strengths 6 strengths
80 mg/mL 400 mg/5 mL 1200 mg/15 mL 2400 mg/10 mL 2400 mg/30 mL 16000000 mg/16000000 mg
125 FDA-listed product records ⓘ

Oral solution

By mouth
Brands Dulcolax Gentle Laxative Milk Of Magnesia Milk Of Magnesia Cherry Milk Of Magnesia Mint Milk Of Magnesia Original Sunmark Milk Of Magnesia Original
How this form is used
What it may be used for
  • Dulcolax (liquid): for relief of occasional constipation and irregularity, generally producing a bowel movement in ½ to 6 hours
  • CareOne Milk of Magnesia Cherry, Careone Milk of magnesia Original: relieves occasional constipation, usually producing a bowel movement in ½ to 6 hours
  • Gentle Laxative, Milk Of Magnesia, Milk Of Magnesia Cherry (liquid): relieves occasional constipation, generally producing a bowel movement in ½ to 6 hours
Important instructions
  • Dulcolax liquid: shake well immediately before each use; use the pre-measured dose cup; drink a full 8 oz glass of liquid with each dose
  • CareOne Milk of Magnesia Cherry, Careone Milk of magnesia Original: shake well before use; drink a full 8 oz glass of liquid; use the provided dosing cup for accurate measurement
  • Milk Of Magnesia liquid: shake well before use; dose may be taken once a day preferably at bedtime, in divided doses, or as directed by a doctor
  • Do not exceed the maximum recommended daily dose in a 24-hour period
Available strengths 1 strength
1200 mg/15 mL
88 FDA-listed product records ⓘ

Chewable tablet

By mouth
Brands Dulcolax Soft Chews Mixed Berry Dulcolax Soft Chews Watermelon Pedia-Lax Walgreens Blueberry Raspberry Gentle Laxative
How this form is used
What it may be used for
  • Dulcolax Chewy Bites Assorted Fruits, Dulcolax Chewy Fruit Bites Cherry Berry, Dulcolax Soft Chews Mixed Berry: for relief of occasional constipation, generally producing a bowel movement in ½ to 6 hours
  • CVS Magnesium Hydroxide Laxative Chew, CVS Health Childrens, Childrens Oral Saline Laxative: for relief of occasional constipation, usually producing a bowel movement in ½ to 6 hours
Important instructions
  • Dulcolax Soft Chews Mixed Berry: drink a full 8 oz glass of liquid with each dose; dose may be taken as a single daily dose or in divided doses
  • Dulcolax Chewy Bites Assorted Fruits, Dulcolax Chewy Fruit Bites Cherry Berry: drink a full 8 oz glass of liquid with each dose
  • Do not exceed the maximum recommended daily dose in any 24-hour period
  • For children under 4 years of age, ask a doctor before use (Dulcolax chewable products)
Available strengths 3 strengths
400 mg 600 mg 1200 mg
35 FDA-listed product records ⓘ

Other oral form

By mouth
Brands MiraFAST KIDS soft chews MiraFAST soft chews
How this form is used
What it may be used for
  • MiraFAST soft chews: relieves occasional constipation, usually producing a bowel movement in ½ to 6 hours
  • MiraFAST KIDS soft chews: relieves occasional constipation, usually producing a bowel movement in ½ to 6 hours
Important instructions
  • MiraFAST soft chews and MiraFAST KIDS soft chews: take by mouth as directed on the product label
  • Do not exceed the maximum recommended daily dose in a 24-hour period
Available strengths 1 strength
1200 mg
4 FDA-listed product records ⓘ

Capsule

By mouth
Brands Colace Fast-Acting Saline Laxative
How this form is used
What it may be used for
  • Colace Fast-Acting Saline Laxative: for relief of occasional constipation (irregularity)
  • Colace Fast-Acting Saline Laxative: generally produces a bowel movement in 30 minutes to 6 hours
Important instructions
  • Colace Fast-Acting Saline Laxative: take by mouth as directed on the label
  • Do not exceed the maximum recommended daily dose in a 24-hour period
Available strengths 1 strength
800 mg
1 FDA-listed product record ⓘ

📊 Magnesium Hydroxide on the U.S. market: products, makers and brands

How Magnesium Hydroxide appears in the FDA’s National Drug Code Directory — including its dosage forms, strengths, brand names, manufacturers, and FDA-listed product records. These are directory records, not sales or prescription volume.

6
Dose forms ⓘ
78
Manufacturers
40
Brand names
282
FDA-listed product records ⓘ
1979
First marketed ⓘ

FDA-listed product records by dose form (tablet variants merged) — FDA National Drug Code Directory. Record counts are not sales or prescription volume.

Also listed with the FDA, not a patient dose form: Powder (16) — bulk drug substance sold to compounders/manufacturers and multi-item kits. These aren’t counted in the dose-form total above.

Chattem, Inc.8%
Strategic Sourcing Services Llc7%
SPI Pharma, Inc.6%
Walgreen Company5%
Geri-Care Pharmaceuticals, Corp4%
Cvs4%
Other makers66%

Share of FDA-listed product records by manufacturer — FDA National Drug Code Directory. Record counts are not sales or prescription volume.

📈 How widely Magnesium Hydroxide is used (Medicaid data)

A general measure of how commonly Magnesium Hydroxide is prescribed, based on Medicaid — one of the largest public drug programs. The figure below is prescriptions filled in Q1–Q4 2025, summed across every form and brand of the drug.

Think of this as a proxy for how widely Magnesium Hydroxide is used, drawn from freely available public data. Medicaid is just one program — these numbers don’t include Medicare, other government coverage, or commercial and cash-pay prescriptions, so real-world use is higher than what’s shown here.

72,007
Medicaid prescriptions filled (Q1–Q4 2025)
$759,226 gross Medicaid reimbursement (before mandatory rebates — net cost is lower)

How commonly is Magnesium Hydroxide prescribed? Of the 1,599 medications we measure, Magnesium Hydroxide ranks #558 by Medicaid prescriptions — more than 65% of them.

Where Magnesium Hydroxide ranks among the drugs we measure · Q1–Q4 2025 · neighbors ±5
Total prescriptions — #558 of 1,599
#553 Ruxolitinib Topical 76,226 Rx #554 Calcipotriene Topical 74,990 Rx #555 Clotrimazole Vaginal 73,195 Rx #556 Ixekizumab Injection 72,831 Rx #557 Pentoxifylline 72,461 Rx #558 Magnesium Hydroxide 72,007 Rx #559 Denosumab Injection 71,350 Rx #560 Cromolyn Ophthalmic 71,026 Rx #561 Cabergoline 70,969 Rx #562 Griseofulvin 70,618 Rx #563 Sodium Zirconium Cyclo... 70,530 Rx

Utilization by Magnesium Hydroxide product

Pick a product to see its own Medicaid numbers. Each chip is one clinical product — a specific strength & dosage form as defined by RxNorm — with brand-name and generic versions combined.

The 80 mg/mL oral suspension is the most-dispensed Magnesium Hydroxide product — about 100% of these Medicaid prescriptions.

magnesium hydroxide 80 MG/ML Oral Suspension Most dispensed

71,776 Medicaid prescriptions (Q1–Q4 2025) 100% of Magnesium Hydroxide prescriptions shown $749,848 gross reimbursement (before rebates) ≈ $10 per prescription (gross)

Summed across the 15 of 168 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 253017

magnesium hydroxide 400 MG Chewable Tablet

148 Medicaid prescriptions (Q1–Q4 2025) <1% of Magnesium Hydroxide prescriptions shown $3,265 gross reimbursement (before rebates) ≈ $22 per prescription (gross)

Summed across the 1 of 5 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 790436

magnesium hydroxide 240 MG/ML Oral Suspension

83 Medicaid prescriptions (Q1–Q4 2025) <1% of Magnesium Hydroxide prescriptions shown $6,113 gross reimbursement (before rebates) ≈ $74 per prescription (gross)

Summed across the 1 of 3 listed NDC products with Medicaid activity — every brand and generic of this exact strength & form. RxNorm 314087

Shares are of the Medicaid prescriptions shown here. Product grouping follows RxNorm (the National Library of Medicine’s drug terminology), so “one product” means one strength & dosage form regardless of manufacturer. Dollar figures are gross Medicaid reimbursement before mandatory rebates — rebates (often large, especially for brand-name drugs) are confidential, so actual net cost to Medicaid is lower than shown.

Source: Medicaid State Drug Utilization Data (CMS), aggregated by generic ingredient — summed across every NDC (all brands, strengths, salt forms and dosage forms) of Magnesium Hydroxide, and across all states and both fee-for-service and managed-care claims. A general popularity signal; it excludes Medicare, commercial insurance and cash prescriptions, so it is not total U.S. use. Based on the 17 of 176 listed Magnesium Hydroxide NDCs with Medicaid activity.

🔍 Compare Magnesium Hydroxide products

A representative set of FDA-listed product records for Magnesium Hydroxide — across manufacturers, strengths, and dosage forms, grouped by form with each product’s manufacturer and how the FDA approved it. The same medicine may be made and packaged by different companies, so a single drug can have many directory entries. (It’s also why a refill can look different — a new shape, color, or box — even though it contains the same medication.)

Showing 200 of 282 products — FDA National Drug Code Directory. See every product, package size and price: browse all 282 Magnesium Hydroxide NDCs →

RxNorm Concept Web — From Ingredient to Every Form and Strength

This page starts with one ingredient concept (IN). The branches below show its dose-form concepts (SCDF), then the available clinical drug and strength concepts (SCD). Combination products remain separate concepts with their own pages.

Ingredient (IN) Magnesium Hydroxide RxCUI 6581 4 dose forms · 10 strengths
  1. Dose form (SCDF) Chewable Tablet RxCUI 372685 In current FDA listings
    Clinical drug / strength (SCD) 311 MG RxCUI 311427 400 MG RxCUI 790436 600 MG RxCUI 2602839 1200 MG RxCUI 2280709
  2. Dose form (SCDF) Oral Capsule RxCUI 2738918 In current FDA listings
    Clinical drug / strength (SCD) 800 MG RxCUI 2738919
  3. Dose form (SCDF) Oral Suspension RxCUI 243353 In current FDA listings
    Clinical drug / strength (SCD) 80 MG/ML RxCUI 253017 83 MG/ML RxCUI 104015 160 MG/ML RxCUI 204760 240 MG/ML RxCUI 314087
  4. Dose form (SCDF) Oral Tablet RxCUI 372687 No current FDA listing
    Clinical drug / strength (SCD) 311 MG RxCUI 242189

Look up RxCUI 6581 in the RxCUI Atlas →

RxNorm is the U.S. National Library of Medicine’s normalized drug vocabulary. Its concept hierarchy can include forms that are not currently marketed; the status on each branch compares that concept with current FDA listings. RxCUIs identify vocabulary concepts, not individual packages or manufacturers.

🏷️ Magnesium Hydroxide brand names

Milk of Magnesia Pedia-Lax Pedia-Lax Chewable Phillips Milk of Magnesia Mirafast Milk of Magnesia Mint Milk Of Magnesia Cherry Milk Of Magnesia Original Gentle Laxative Sunmark Milk Of Magnesia Original Dulcolax Walgreens Blueberry Raspberry Gentle Laxative Milk of Magnesia Concentrate Equaline milk of magnesia Dulcolax Soft Chews Watermelon Dulcolax Soft Chews Mixed Berry

🏭 Who makes Magnesium Hydroxide: manufacturers and labelers

Chattem, Inc. 19 Strategic Sourcing Services Llc 15 SPI Pharma, Inc. 14 Walgreen Company 11 Geri-Care Pharmaceuticals, Corp 9 Cvs 9 Chain Drug Marketing Association 8 H E B 8 Kroger Company 7 Cardinal Health 7 Rugby Laboratories 6 Rite Aid Pharmacy 6 Amerisourcebergen Drug Corporation 6 Valu Merchandisers Company 6 Top Care (topco Associates Llc) 6 CVS Pharmacy 5 Goodsense 5 Meijer, Inc. 5 Cvs Pharmacy,inc. 4 SPI Pharma Inc. 4 Wal-Mart Stores, Inc. 4 Cardinal Health 107, LLC 4 Bayer HealthCare LLC. 4 Retail Business Services, LLC. 4

…and 16 more on the FDA NDC directory.

Magnesium Hydroxide drug class (RxNorm)

Magnesium Hydroxide belongs to the Magnesium compounds class.

Drug family (ATC) Magnesium compounds, Other urologicals

Classified by RxNorm RxClass — the U.S. National Library of Medicine's standardized drug-classification service (Established Pharmacologic Class from the FDA, the ATC drug family from the WHO, and mechanism of action). Reference only, not medical advice.

🔬 Sources for this Magnesium Hydroxide page

Core label, product, RxNorm, safety, and utilization data on this page come from the sources identified below. AI-written, editorial, and licensed sections are labeled separately.

📄
FDA-filed drug labels (SPL) Uses, dosing, warnings & side effects from SPL records retrieved through openFDA; the linked representative set can be verified on DailyMed. ✓ Linked label effective Aug 14, 2026
🏭
Forms, brands & labelersAggregated from ingredient-matched FDA National Drug Code Directory product records for Magnesium Hydroxide.
📈
Real-world reportsThe FDA Adverse Event Reporting System (FAERS), served through openFDA.
🚨
Recalls & shortagesopenFDA drug-enforcement reports and the FDA drug-shortage database.
🧾 Clinical label set — FDA-filed SPL labels retained for Magnesium Hydroxide after exact ingredient or ingredient-combination matching and applicable route/form matching
Clinical labels in scope
91
NDC products indexed
282
Distinct labelers/manufacturers represented
78
Linked representative label ⓘ
Cvs Pharmacy,inc.
Linked label effective
Aug 14, 2026
Composite sections available
7
Linked SPL Set ID
e57e5529-2190-4c66-8397-bc2848739e59
Linked SPL Document ID
135615af-b000-44b3-879d-ba1d82d1b7ab
Open the linked representative label on DailyMed ↗

How we combine label and product data

HelloPharmacist combines public FDA and NLM records; we don’t author the underlying clinical facts. We identified 91 FDA-filed SPL label sets within the page’s selected clinical scope after exact ingredient or ingredient-combination matching and applicable route/form matching. The representative label is the starting point for the displayed reference monograph; the 12 largest stored in-scope SPL records, which may include that representative, are compared section by section, and the longest available version of each section is retained. Forms, routes, brands, labelers, product-listed strengths, and product-record counts are aggregated separately from ingredient-matched FDA NDC Directory records; package records listed above are associated with the linked SPL; and the normalized concept hierarchy comes from NLM RxNorm.

For canonical ingredient pages, bounded product-attributed indication and administration excerpts may be added to the AI evidence, and the generator is instructed to preserve available product, brand, route, and form qualifiers instead of treating one label as universal. Where a section is identified as AI-written, its plain-language text is generated from bounded label evidence. New draft drug pages remain in the admin review queue before first publication. Cvs Pharmacy,inc. is the representative DailyMed label linked for verification and dates; it is not the sole source used for the page.

This is general education, not medical advice — always consult your doctor or pharmacist about your medications and any medical condition. For the exact wording of the linked representative label, view that label on DailyMed; some displayed composite sections may come from other in-scope SPL labels. Learn how we use AI and our data sources & update cadence.