Attention U.S. Travelers: What You Need to Know About Bringing Vicks DayQuil/NyQuil to South Korea

Many travelers heading to South Korea from the United States often bring over-the-counter (OTC) cold and flu medications such as Vicks DayQuil and NyQuil, especially those purchased at Costco. At one time, these were even included on “must-buy” drug lists among Korean tourists visiting the U.S.

However, these seemingly harmless products can lead to serious legal issues at Korean customs, due to specific ingredients classified under Korea’s strict narcotic control laws.

If you are planning to bring these medications for personal use or to gift them to friends or family, you must read this guide carefully.

---

🧪 The Ingredient in Question: Dextromethorphan

Many versions of Vicks DayQuil and NyQuil, including Severe formulations sold at Costco and other retailers, contain an active ingredient called Dextromethorphan HBr.

While Dextromethorphan is freely sold in the U.S. as a cough suppressant, it is classified as a psychotropic substance in South Korea and subject to strict import control.
Although certain Korean OTC medications do contain this ingredient, only products approved by the Korean Ministry of Food and Drug Safety (MFDS) are legally permitted.
Therefore, bringing in foreign-made medications containing Dextromethorphan—even if they are sold over-the-counter in the U.S.—requires prior MFDS approval. Without it, the product may be confiscated or result in legal consequences.

---

🧭 Bringing It in Legally: 5 Key Things You Must Know

1. ✅ Check the Active Ingredients

Before purchasing any product—whether it’s Severe or Regular, liquid or LiquiCap, Vicks or Kirkland Signature brand—you must carefully review the label for Dextromethorphan.

Make sure to verify both the brand name and product formulation, as Costco sells multiple variants under different labels.

2. Prior Approval Is Mandatory

If the product contains Dextromethorphan, you cannot bring it into Korea under the general OTC limit (6 bottles / 3 months). Prior approval from the Korean Ministry of Food and Drug Safety (MFDS) is required, regardless of quantity.

3. Apply for MFDS Import Permission in Advance

If you must bring these medications for personal medical reasons, apply at least 10 business days in advance—ideally 3 weeks before travel—through the MFDS Narcotics Division.

You’ll need to submit:

• An official medical diagnosis or prescription in English or Korean
• Information about the product (name, dosage, ingredients)
• The total amount required during your stay

Failure to complete this process in time may result in denial of entry for the medication at customs.

4. 💊 Consider Alternative Medications

If you’re unsure about the approval process or wish to avoid the paperwork, consider using cold and flu medications that are already approved and sold within Korea.
Although some Korean OTC drugs may contain Dextromethorphan, only MFDS-approved formulations are allowed for use and possession.
U.S. products with the same ingredient are not automatically permitted for import.

These are widely available at pharmacies across Korea. Common alternatives include:

• Cough Syrup S (코푸시럽에스)
• Tylenol Cold-E S
• Coldaewon Night Syrup (콜대원나이트시럽)

Consult a local pharmacist or physician in Korea if you’re unsure about which product suits your symptoms.

5. Do Not Ship It by Mail or Courier

Under no circumstances should you try to mail these products to Korea via international shipping. Doing so can result in confiscation, fines, or even criminal penalties.

---

Legal Basis: South Korea’s Narcotics Control Act

Dextromethorphan is listed as a Category 3 psychotropic drug (Item No. 65) under Article 2, Paragraph 3 of South Korea’s Narcotics Control Act.

You can refer to the full list of regulated substances on the Korea Customs Service website here:
👉 Official Narcotics Substance List (Korean)

---

Final Advice for Travelers

While Vicks cold medicines are freely available in the U.S., Korea’s regulations on certain active ingredients are significantly stricter. Dextromethorphan, in particular, is considered a controlled substance with high abuse potential.

To ensure a smooth and lawful travel experience, verify the ingredients before packing any medication, and follow the necessary approval procedures if required.

Avoid surprises at customs—plan ahead and stay informed.