Medication info

Lactolax Syrup (Lactulose Concentrate)

OTC medicationSyrup경구
Ingredient · strength
Lactulose Concentrate Solution›134g / 100mL
Manufacturer / importer
(주)마더스제약
Appearance
A viscous syrup that is colorless to pale yellow, contained in an aluminum foil pouch.
Packaging
15 milliliters/pack, 20 packs/box
Approval status
Active

MFDS item code 202600282 · Notified 2026.01.30

Summary

Main use
Improvement of chronic constipation and constipation in infants and young children
Who takes it
Adults · Children
Adult dose
Chronic constipation: Administer before breakfast. Generally, for the first 2-3 days, administer 15-30 mL orally before breakfast once daily, then continue with 10-15 mL once daily. In severe cases, can be administered up to 45 mL.
Child dose
Children (7 to 14 years old): Initially administer 15 mL once daily for the first 2-3 days, then continue with 10 mL once daily. Infants (1 to 6 years old): Administer 5-10 mL once daily. Infants (under 12 months):

Ingredients

Manufacturer
(주)마더스제약

Efficacy & effects

Improvement of chronic constipation and constipation in infants and young children

  • Chronic constipation
  • constipation in infants and young children
  • constipation after childbirth
View approved original text

This medication is used to treat chronic constipation, constipation in infants and young children, and constipation occurring after childbirth.

How to take

Adult dose

Chronic constipation: Administer before breakfast. Generally, for the first 2-3 days, administer 15-30 mL orally before breakfast once daily, then continue with 10-15 mL once daily. In severe cases, can be administered up to 45 mL.

Child dose

Children (7 to 14 years old): Initially administer 15 mL once daily for the first 2-3 days, then continue with 10 mL once daily. Infants (1 to 6 years old): Administer 5-10 mL once daily. Infants (under 12 months):

Precautions

This medication should not be taken by individuals with inflammatory bowel disease, gastrointestinal obstruction, or unexplained abdominal pain. Additionally, those allergic to lactose or any component of this medication should avoid it. Pregnant or breastfeeding women, infants and children, the elderly, diabetes patients, and those with electrolyte imbalances should consult a doctor or pharmacist before taking this medication. In particular, this medication is not suitable for individuals with genetic lactose intolerance. If constipation does not improve during use or if there are sudden changes in bowel habits, discontinue use immediately and consult an expert. Overdosage may lead to abdominal cramps, diarrhea, and electrolyte loss, so caution is needed. Long-term or excessive use may cause dependency of the bowel reflex on the medication, so caution is advised. If diarrhea or loose stools occur during use, reduce the dosage or discontinue use. Gastrointestinal symptoms such as belching, abdominal pain, nausea, and vomiting may occur, so it is recommended to consult a professional if any unusual symptoms appear. If there is a large amount of hydrogen gas in the intestine after taking this medication prior to an endoscopy, there is a risk of explosion, so the bowel should be completely cleansed before the examination. Long-term use may lead to fluid loss and electrolyte imbalance, so regular monitoring is necessary. When administered to children for extended periods, there may be an increased risk of dental caries, so dental hygiene should be maintained. This medication should be stored out of the reach of children and kept sealed in its original container for safety.

Side effects and when to seek care immediately

Mild side effects

  • Belching
  • crampy abdominal discomfort
  • diarrhea
  • abdominal discomfort
  • abdominal bloating
  • abdominal pain
  • loss of appetite
  • nausea
  • vomiting
  • loose stools
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  • electrolyte loss
  • hypokalemia
  • hypernatremia
  • potential for dental caries

Not everyone experiences these, and they can vary from person to person.

Storage

This medication must be stored in a tightly sealed container to prevent exposure to air or moisture. It is advisable to maintain a storage temperature between 1 to 30 degrees Celsius at room temperature. This will help preserve the effectiveness of the medication and ensure its safe use.

Appearance and packaging

Appearance

A viscous syrup that is colorless to pale yellow, contained in an aluminum foil pouch.

Package unit

15 milliliters/pack, 20 packs/box

Same-ingredient medicines

Even with the same ingredient, strength, dosage form and how it is taken can differ.

Even with the same ingredient, the dose and directions can differ by strength and dosage form. Talk to a doctor or pharmacist before switching from a medication you are already taking.

Questions about this medicine

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For anything that needs medical judgment, consult a doctor or pharmacist.

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This drug information is based on data provided by the Korea Ministry of Food and Drug Safety.
Consult a doctor or pharmacist for accurate dosage, administration, and usage instructions.