pilldic.Your medicine dictionary
Text size
← US medicines
US · Over-the-counter medicine

Milk of Magnesia

Dosage form
LIQUID
Labeler
Rij Pharmaceutical Corporation
Label updated
2018-04-30
Retrieved
2026-09-07
Active ingredients
MAGNESIUM HYDROXIDE
View original label and images on DailyMed ↗
Active Ingredient (in each 5 mL) One teaspoonful)

Magnesium Hydroxide 400 mg

Purpose

Saline laxative/Antacid

Use

Laxative

  • •relieves occasional constipation (irregularity).
  • •generally produces bowel movement in ½ to 6 hours.

Antacid

  • •relieves acid indigestion, sour stomach, heartburn.
Warnings

Ask a doctor before use if you have

  • •kidney disease
  • •stomach pain, nausea or vomiting
  • • notice a sudden change in bowel habits that persists over a period of 2 weeks
  • •a magnesium-restricted diet

Ask a doctor or pharmacist before use if you are

taking a prescription drug. Antacid may interact with certain prescription drugs.

When using this product

  • •it may have a laxative effect
  • •do not exceed the maximum recommended daily dosgae in a 24-hour period

Stop use and ask a doctor if

Laxative

  • •you have rectal bleeding or failure to have a bowel movement after use. These may indicate a serious condition.
  • •you need to use a laxative for more than one week

Antacid

  • •symptoms last for more than 2 weeks.

If pregnant or breast-feeding,

ask a health professional before use.

Keep out of reach of children.

In case of accidental overdose, get medical help or contact a Poison Control Center immediately.

Directions
  • •shake well before use
Laxative use: Antacid use

Do not use dosage cup for ages under 12 years.

Follow each dose with a full glass (8 oz) of liquid.

Do not use dosage cup.

Follow each dose with a little water.

adults and children 12 years and older 2-4 TBSP (30-60 mL) once a day 1-3 tsp (5-15 mL) up to 4 times a day
6 to 11 years 1-2 TBSP (15-30 mL) once a day ask a doctor
2 to 5 years 1-3 tsp (5-15 mL) once a day ask a doctor
under 2 years ask a doctor ask a doctor
Other information
  • •TAMPER EVIDENT: Do not use if breakaway band on cap is broken or missing.
  • •Store at room temperature 15º - 30ºC (59º - 86ºF)
  • •keep tightly closed
  • •keep from freezing
  • •each teaspoon (5 mL) contains: magnesium 166 mg
  • •each teaspoon (5 mL) contains: sodium 1 mg
Inactive ingredients

citric acid, flavor, purified water, sodium hypochlorite.

Principal Display Panel

[Image in the official label — see DailyMed source]

DailyMed Set ID: c30d3ecf-34af-4a28-be2e-21e86b882bda · Version 2
NDC: 53807-401