Medical Editor: John P. Cunha, DO, FACOEP Last updated on RxList: 11/18/2021

What is Dulcolax and how is it used?

Dulcolax is an over the counter medicine used to treat the symptoms of Constipation. Dulcolax may be used alone or with other medications.

Dulcolax belongs to a class of drugs called Laxatives, Stimulant.

It is not known if Dulcolax is safe and effective in children younger than 6 years of age.

What are the possible side effects of Dulcolax?

Dulcolax may cause serious side effects including:

  • hives,
  • difficulty breathing,
  • swelling of your face, lips, tongue, or throat,
  • persistent nausea,
  • vomiting,
  • diarrhea,
  • muscle cramps or weakness,
  • irregular heartbeat,
  • severe dizziness,
  • fainting,
  • decreased urination,
  • mental or mood changes, 
  • confusion,
  • rash, and
  • itching

Get medical help right away, if you have any of the symptoms listed above.

The most common side effects of Dulcolax include:

  • abdominal pain,
  • stomach cramping,
  • nausea, 
  • diarrhea, and
  • weakness

Tell the doctor if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of Dulcolax. For more information, ask your doctor or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

This may not be a complete list of side effects. For any unexpected effects while taking DULCOLAX, contact your doctor or pharmacist.


Route of Administration Dosage Form / Strength Clinically Relevant Nonmedicinal Ingredients
Oral tablet 5 mg acacia, white wax, carnauba wax, corn starch (dried/soluble), methacrylic acid and ethyl acrylate copolymer dispersion, glycerine, lactose monohydrate, magnesium stearate, polyethylene glycol, sucrose, talc, glyceryl monostearate, triethyl citrate, polysorbate 80, D&C Yellow #10 Aluminum Lake, D&C red no. 30, povidone, sodium benzoate, methylparaben, propylparaben and titanium dioxide.
Rectal suppository 10 mg hard fat