Medication info

Dolce Lac Syrup (Lactulose Concentrate)

OTC medicationSyrup경구
Ingredient · strength
Lactulose Concentrate Solution›134g / 100mL
Manufacturer / importer
삼진제약(주)
Appearance
A clear to pale yellow syrup
Packaging
20 sachets/box [15 milliliters/sachet * 20], 15 milliliters/sachet
Approval status
Active

MFDS item code 201907041 · Notified 2019.10.02

Summary

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

Ingredients

Manufacturer
삼진제약(주)

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 relieve constipation. It is especially effective for patients with chronic constipation as well as for infants and children experiencing constipation. It also helps improve constipation symptoms that occur after childbirth.

How to take

Adult dose

Chronic constipation: Take before breakfast. Generally, for the first 2-3 days, 15-30mL is administered orally before breakfast, then continue with 10-15mL per day. In severe cases, it may be administered up to 45mL.

Child dose

Children (ages 7-14): Initially, 15mL per day for the first 2-3 days, then continue with 10mL per day. Infants (ages 1-6): 5-10mL per day. Babies (under 12 months): 5

Precautions

This medication should not be taken by individuals with certain gastrointestinal disorders. For example, those with inflammatory bowel disease or gastrointestinal obstruction should avoid this medication. People with unexplained abdominal pain or those lacking lactase enzyme are also advised to avoid this medication. Furthermore, individuals with an allergy to this medication must not take it. Women who are pregnant or breastfeeding, as well as young children, must consult a doctor or pharmacist before taking this medication. It is also safe for the elderly or diabetic patients to consult a healthcare professional before use. Individuals with fluid or electrolyte imbalances should correct their condition before taking this medication. Additionally, patients with acute gastritis or chronic constipation should consult with healthcare personnel before using this medication. This medication may interact with other drugs, so individuals taking specific antibiotics, diuretics, antacids, etc., should consult a professional. If constipation does not improve after taking this medication for a week or if there is a sudden change in bowel habits, the medication should be stopped immediately and advice should be sought from a doctor or pharmacist. In cases of overdose, symptoms such as abdominal cramping, diarrhea, and electrolyte loss may occur, so if such symptoms arise, immediate discontinuation and professional treatment are required. Long-term or excessive use of this medication may lead to dependence of the bowel reflex on the drug, so caution is necessary. If diarrhea or loose stools occur, the dosage should be reduced or discontinued. Gastrointestinal side effects may include belching, abdominal discomfort, abdominal pain, decreased appetite, nausea, and vomiting. For patients undergoing colonoscopy while taking this medication, there is a risk of explosion if hydrogen gas accumulates in the intestine, so the bowel must be completely cleansed with a non-fermentable cleanser before the examination. Long-term use may lead to fluid loss or electrolyte abnormalities, hypokalemia, hypernatremia, etc., so regular testing is necessary. When administered to children for long periods, there may be an increased risk of cavities, so special attention should be given to oral hygiene. Pregnant women should consult a professional before taking this medication for safety reasons, despite reports of safety for the fetus. Breastfeeding women are also advised to discuss with a doctor or pharmacist before taking this medication.

Side effects and when to seek care immediately

Mild side effects

  • Belching
  • crampy abdominal discomfort
  • diarrhea
  • abdominal pain
  • abdominal bloating
  • abdominal pain
  • decreased appetite
  • nausea
  • vomiting
  • electrolyte abnormalities
Show 3 more
  • hypokalemia
  • hypernatremia
  • risk of cavities

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

Interactions

Drug interactions

This medication may interact with α-glucosidase inhibitors such as acarbose. Consult with a doctor or pharmacist when taking with broad-spectrum antibiotics, diuretics, corticosteroids, amphotericin B, cardiac glycosides, or antacids.

Storage

This medication should be stored in a tightly sealed container to prevent exposure to air or moisture. Additionally, it is recommended to store the medication at room temperature, between 1°C and 30°C. This will help maintain the medication's effectiveness over time.

Appearance and packaging

Appearance

A clear to pale yellow syrup

Package unit

20 sachets/box [15 milliliters/sachet * 20], 15 milliliters/sachet

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

  • QCan it be given to infants under one year old for constipation?

    The approved indications state 5mL daily for infants under 12 months. It is important to identify the cause of infant constipation, so please consult with a pediatrician before administering.

    Answers 1 · 2026.09.14

  • QShould I take it in the morning?

    For chronic constipation, it is recommended to take it before breakfast. Adults usually take 15–30mL for the first 2–3 days, then reduce to 10–15mL daily thereafter and if loose stools or diarrhea occur, stop taking and consult a pharmacist.

    Answers 1 · 2026.09.14

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.