Magnesium Hydroxide

Indications

Uses As an Antacid • heartburn • upset/sour stomach • acid indigestion As a Laxative (usually within ½ to 6 hours) • occasional constipation (irregularity)

Dosage and administration (summary)

Directions As an Antacid • do not exceed the maximum recommended daily dose in a 24 hour period • shake well before use • can be taken with water • mL = milliliter adults and children 12 years of age and over 5 to 15 mL (1 to 3 teaspoonfuls) children under 12 years of age ask a doctor As a Laxative • do not exceed the maximum recommended daily dose of 60 mL in a 24 hour period • shake well before use • dose may be taken once a day preferably at bedtime, in divided doses, or as directed by a doctor. Drink a full glass (8 oz) of liquid with each dose. • mL = milliliter.

Warnings and precautions

Warnings Ask a doctor before use if you have • kidney disease • a magnesium-restricted diet • stomach pain, nausea, or vomiting • a sudden change in bowel habits that lasts over 14 days Ask a doctor or pharmacist before use If you are 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 serious condition. • you need to use a laxative for more than 1 week If pregnant or breast-feeding, ask a health professional before use.

Storage and supply

Other information • each teaspoonful (5 mL) contains: magnesium 400 mg • store at room temperature, 20° - 25°C (68° - 77°F). Avoid freezing. • Milk of Magnesia USP (white suspension, spearmint flavor) is supplied in the following oral dosage form: Overbagged with 5 x 30 mL unit dose cup in each bag, NDC 55154-9403-5 WARNING: This Unit Dose package …

Source: Magnesium Hydroxide (Milk Of Magnesia) — US FDA prescribing information, 2026-06-05, DailyMed. Summarised and shortened; the full label governs. Iranian registration, indications and labelling may differ.