Medication info
Retikof Soft Capsule

Retikof Soft Capsule

OTC medicationSoft capsule경구
Ingredient · strength
Acetaminophen›200mg / 1 capsuleDL-Methylephedrine Hydrochloride›12.5mg / 1 capsuleDextromethorphan Hydrobromide Hydrate›8mg / 1 capsuleGuaifenesin›40mg / 1 capsule
Manufacturer / importer
(주)서흥
Appearance
A blue transparent oval soft capsule containing a transparent liquid that ranges from pale yellow to light blue.
Packaging
10 capsules/PTP
Approval status
Active

MFDS item code 201902787 · Notified 2019.04.30

Summary

Main use
Relief of cold symptoms (sore throat, cough, etc.)
Who takes it
Adults · Children
Adult dose
Aged 15 and over: Take 2 capsules three times a day 30 minutes after meals
Child dose
Children over 7 years old to under 15 years: Take 1 capsule three times a day 30 minutes after meals

Ingredients

Manufacturer
(주)서흥

Efficacy & effects

Relief of cold symptoms (sore throat, cough, etc.)

  • Sore throat
  • cough
  • phlegm
  • chills
  • fever
  • headache
  • joint pain
  • muscle pain
View approved original text

This medication is used to relieve various symptoms of cold, including sore throat, cough, phlegm, chills, fever, headache, joint pain, and muscle pain.

How to take

Adult dose

Aged 15 and over: Take 2 capsules three times a day 30 minutes after meals

Child dose

Children over 7 years old to under 15 years: Take 1 capsule three times a day 30 minutes after meals

Precautions

This medication may put a strain on the liver, so individuals who regularly consume more than three drinks per day should consult a physician or pharmacist before taking this medication or other antipyretic analgesics. If severe rash, blistering, or itching appears while taking this medication, stop taking it immediately and consult a healthcare professional. As it contains acetaminophen, be careful not to exceed the maximum daily dosage and do not take it with other acetaminophen-containing medications. Individuals who have had allergic reactions to this medication or its ingredients, have experienced asthma, infants under 3 months of age, or those taking or recently stopping certain antidepressants or psychiatric medications should not take this medication. During treatment, it is safest not to use this medication with other drugs containing cold medications, antipyretics, sedatives, or antihistamines. Infants infected with chickenpox or influenza, children under 15 years old, and individuals with allergies, or multiple diseases involving the liver, kidneys, or heart should consult a healthcare professional before taking it. Pregnant or breastfeeding women should also consult a physician before taking this medication. If skin rash, vomiting, dizziness, anxiety, or other symptoms occur after taking it, stop taking it, and consult a healthcare professional. If symptoms do not improve after 5-6 doses, you must consult a specialist. It is generally inadvisable to use this medication in children under 2 years of age, and if necessary, medical consultation is required. Adhere strictly to the prescribed dosage and duration, avoid prolonged use, and if children take it, caregivers should supervise. Avoid alcohol during treatment and be cautious about drug interactions when taking it with certain medications. Caution is required if this medication is taken with the specific antibiotic flucloxacillin, as serious metabolic disorders may rarely occur; if any abnormal symptoms are suspected, stop taking it immediately. Store this medication out of reach of children, avoiding exposure to direct sunlight and keeping it sealed in a cool, dry place. Also, it is important not to transfer it to other containers to maintain quality.

Side effects and when to seek care immediately

Serious side effects

  • Hives, severe swelling (edema), chest tightness, difficulty breathing, cold sweat, paleness → severe allergic reaction
  • High fever with severe rash, blisters, skin peeling, pain in oral/ocular mucosa → severe skin adverse reaction
  • Asthma attack, cough + fever accompanied by respiratory issues → respiratory problems
  • Yellowing of skin or eyes (jaundice), severe malaise → liver dysfunction (jaundice)

Mild side effects

  • Nausea
  • vomiting
  • loss of appetite
  • constipation
  • swelling
  • dizziness
  • anxiety
  • tremors
  • insomnia
  • rash
Show 2 more
  • redness
  • itching

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

Interactions

Drug interactions

Do not take this medication with MAO inhibitors (such as antidepressants, antipsychotics, mood stabilizers, or antiparkinsonian agents), expectorants, other cold medications, antipyretics, sedatives, or antihistamines (oral medications for allergies, motion sickness, etc.). Additionally, consult a physician or pharmacist if taken with diabetes medications, gout medications, arthritis medications, anticoagulants, steroids, barbiturates, or tricyclic antidepressants.

Food interactions

Do not consume alcohol during treatment.

Storage

This medication must be stored in a tightly sealed container to avoid exposure to air and light. Additionally, it should be stored at room temperature between 1°C and 30°C, avoiding extremely hot or cold places.

Appearance and packaging

Appearance

A blue transparent oval soft capsule containing a transparent liquid that ranges from pale yellow to light blue.

Package unit

10 capsules/PTP

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

  • QWhat should I do if I notice jaundice while taking this?

    If you experience general malaise or symptoms of liver dysfunction, such as jaundice, you should immediately discontinue use and consult a doctor or pharmacist. If your skin or eyes appear yellow, seek medical attention promptly.

    Answers 1 · 2026.09.14

  • QI have trouble sleeping after taking this.

    Symptoms such as anxiety, trembling, and insomnia are listed as adverse reactions to this medication. If these symptoms occur, please discontinue use and consult a doctor or pharmacist. If you wish to switch to another cold medication, check the ingredients with the pharmacist.

    Answers 1 · 2026.09.14

  • QIt says to take it 30 minutes after a meal, but is it okay to take it right after eating?

    The product manual advises taking the medication 30 minutes after meals. It is best to adhere to this recommended timing, so please ensure that you confirm with the pharmacist if you are confused about the dosing times.

    Answers 1 · 2026.09.14

See all questions
  • QFrom what age can it be taken?

    Children over 7 years to under 15 years should take 1 capsule once, while those aged 15 years and older and adults should take 2 capsules three times a day after meals, 30 minutes after eating. For younger children, consult with a pharmacist or doctor before administering.

    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.