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Magnesium Hydroxide

OTC Oral RxCUI 253017
Contents

Overview

Active ingredient
Magnesium Hydroxide
Route
Oral
Label date
2026-01-05

Indications and usage

Uses as Antacid

  • relieves
  • heartburn
  • sour stomach
  • acid indigestion
  • and upset stomach associated with these symptoms

Uses as Saline Laxative

  • for relief of occasional constipation (irregularity)
  • this product generally produces bowel movement in 1/2 to 6 hours

Purpose

Antacid / Saline Laxative

Dosage and administration

Directions for Antacid

  • shake well before use
  • mL=milliliters
  • adults and children 12 years of age or older: 30 mL (1 dose) up to 2 times a day or as directed by a doctor
  • children under 12 years of age: ask a doctor

Directions for Saline Laxative

  • do not exceed the maximum recommended daily dose of 60 mL in a 24 hour period
  • shake well before use
  • mL=milliliters
  • drink a full glass (8 oz) of liquid with each dose
  • adults and children 12 years of age or older: 30 mL to 60 mL (1 to 2 doses)
  • children under 12 years of age: ask a doctor
  • the dose may be taken as a single daily dose or in divided doses

Warnings

for Antacid Ask a doctor before use if you have

  • kidney disease
  • a magnesium-restricted diet Ask a doctor or pharmacist before use If you are presently taking a prescription drug. Antacids may interact with certain prescription drugs. When using this product
  • do not take more than 60 mL (2 doses) in a 24-hour period
  • do not use the maximum dosage for more than 2 weeks except under the advice and superision of a doctor
  • may cause a laxative effect If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact a poison control center right away.

for Saline Laxative Ask a doctor before use if you have

  • kidney disease
  • a magnesium-restricted diet
  • abdominal pain, nausea, or vomiting
  • a sudden change in bowel habits that lasts more than 2 weeks Ask a doctor or pharmacist before use If you are
  • presently taking a prescription drug. This product may interact with certain prescription drugs. Stop use and ask a doctor if
  • you have rectal bleeding or no bowel movement after using this product. These could be signs of a seriouscondition.
  • you need to use a laxative for more that 1 week If pregnant or breast-feeding, ask a health professional before use. Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away.

Ask a doctor before use if

Ask a doctor before use if you have

  • kidney disease
  • a magnesium-restricted diet

Ask a doctor before use if you have

  • kidney disease
  • a magnesium-restricted diet
  • abdominal pain, nausea, or vomiting
  • a sudden change in bowel habits that lasts more than 2 weeks

Ask a doctor or pharmacist before use if

Ask a doctor or pharmacist before use If you are presently taking a prescription drug. Antacids may interact with certain prescription drugs.

Ask a doctor or pharmacist before use If you are

  • presently taking a prescription drug. This product may interact with certain prescription drugs.

When using this product

this product

  • do not take more than 60 mL (2 doses) in a 24-hour period
  • do not use the maximum dosage for more than 2 weeks except under the advice and superision of a doctor
  • may cause a laxative effect

Stop use and ask a doctor if

and ask a doctor if

  • you have rectal bleeding or no bowel movement after using this product. These could be signs of a seriouscondition.
  • you need to use a laxative for more that 1 week

Pregnancy or breast-feeding

If pregnant or breast-feeding, ask a health professional before use.

If pregnant or breast-feeding, ask a health professional before use.

Active ingredient (label)

(in each 30 mL dose) Magnesium hydroxide 2400 mg

Inactive ingredients

s antifoam af emulsion, flavoring, hydroxypropyl methylcellulose, methylparaben, potassium citrate, propylene glycol, propylparaben, purified water, sodium saccharin, sorbitol

Storage and handling

Other information for Antacid

  • each 30 mL contains: magnesium 1 g
  • store at 20° - 25°C (68° - 77°F)
  • protect from freezing
  • tamper-evident: do not use if seal on cup is missing or torn

Other information for Saline Laxative

  • each 30 mL contains: magnesium 1 g
  • store at 20° - 25°C (68° - 77°F)
  • protect from freezing
  • tamper-evident: do not use if seal on cup is missing or torn

Keep out of reach of children

of children. In case of overdose, get medical help or contact a poison control center right away.

of children. In case of overdose, get medical help or contact a Poison Control Center right away.