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Lactitol Dosage

Usual Adult Dose for Chronic Idiopathic Constipation

20 grams orally once a day


  • This drug should be added to 4 to 8 ounces of water, juice, or other beverages (e.g., coffee, soda, tea) and stirred to dissolve.
  • This drug should be consumed immediately after preparation.

Use: Chronic idiopathic constipation (CIC)

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Data not available

Dose Adjustments

Persistent loose stools: Reduce the dose to 10 grams orally once a day



  • Galactosemia
  • Known/suspected mechanical gastrointestinal obstruction

Safety and efficacy have not been established in pediatric patients.

Consult WARNINGS section for additional precautions.


Data not available

Other Comments

Administration advice:

  • This drug should be taken with meals.
  • Oral drugs should be separated by at least 2 hours before or after taking this drug.

Reconstitution/preparation techniques:
  • The manufacturer product information should be consulted.

Patient advice:
  • Inform patients that they should stop treatment and contact their healthcare provider if persistent loose stools occur.
  • Advise patients to speak to their healthcare provider if they become pregnant, intend to become pregnant, or are breastfeeding.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.