Relief in as little as 30 minutes*.

When you need gentle and fast-acting constipation relief, in as little as 30 minutes*, reach for Dulcolax® Liquid Laxative.

  • *Works in 30 minutes to 6 hours
  • Contains the active ingredient, magnesium hydroxide, which draws water into the colon to help stool to pass
  • Works naturally with the water in your body
  • Stimulant-free

Dulcolax® Liquid Laxative works naturally with the water in your body (stimulant free) to provide gentle, fast-acting constipation relief in as little as 30 minutes (30 minutes to 6 hours).

Dulcolax® Liquid Laxative works faster than MiraLAX. Dulcolax® works in as little as 30 minutes (30 minutes to 6 hours) while MiraLAX works in 1-3 days (based on product labeling).

Yes, when used as directed, Dulcolax® Liquid Laxative can be used for children age 2+. The recommended dosage is 5 mL to 15 mL for children 2 to 6 years old, 15 mL to 30 mL for children 6 to 12 years old and 30 mL to 60 mL for children 12 years of age and older. For children under 2 consult your doctor.

If you need to use for more than 7 days, please discuss with your doctor.

Active ingredient (in each 15 mL)

Magnesium hydroxide USP 1200 mg


Saline Laxative


  • for relief of occasional constipation and irregularity
  • this product generally produces a bowel movement in 30 minutes to 6 hours


Ask a doctor before use if you have

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

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 fail to have a bowel movement after using this product. These could be signs of a serious condition.
  • you need to use a laxative for more than 7 days

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 


  • shake well immediately before each use
  • for accurate dosing, use convenient pre-measured dose cup
  • drink a full glass (8 oz) of liquid with each dose
  • dose may be taken as a single daily dose or in divided doses
  • do not exceed the maximum recommended daily dose in a 24-hour period

    Adults and children 12 years of age and over

    30 mL to 60 mL

    Children 6 to under 12 years of age

    15 mL to 30 mL

    Children 2 to under 6 years of age

    5 mL to 15 mL

     Children under 2 years of age

    ask a doctor.

Other information

  • Each 15 mL contains: calcium 20 mg, magnesium 595 mg, potassium 5 mg, sodium 3 mg
  • Do not use if safety seal is broken or missing
  • Close cap tightly after each use
  • Store at room temperature 20° - 25°C (68° - 77°F)

Inactive Ingredients:

Anhydrous citric acid, D&C red #28, flavor, glycerin, purified water, sorbitol, sucrose, xanthan gum.