Korean Herbal Medicine: 7 Essential Safety Questions

What Korean herbal medicine usually means

In Korea, herbal medicine is called hanyak. Licensed Korean medicine doctors (hanuisa) prescribe it. Korea licenses them separately from medical doctors.

A prescription is usually a mix of several herbs. It is often made for one person. It can come as liquid pouches, granules, powders or pills.

Some clinics offer herbal medicine with acupuncture, cupping or a wellness program. Our guide to Korean traditional medicine explains the wider field. See also Korean medicine and wellness programs.

Research on many herbal products is limited. The US National Center for Complementary and Integrative Health (NCCIH) says studies of Chinese herbal products have had mixed results. Many of those studies were of poor quality. Ask what the herbs are for and what other options exist.

Herbal medicine is not a replacement for urgent or necessary medical care. If you have a diagnosed condition, keep your usual doctor involved.

This guide does not judge any clinic or prescription. It lists the questions to ask so you can decide with clear information. Use it alongside the advice of the people who know your health.

What happens at the consultation

A first visit usually starts with questions. The Korean medicine doctor may ask about your symptoms, sleep, digestion, appetite and medical history.

Prepare before the visit. It saves time and avoids gaps.

• Write a short summary of your health conditions in English.
• List every medicine and supplement you take, with doses.
• List allergies and any past reactions to herbs or foods.
• Note any surgery, procedure or dental work planned during your trip.
• Bring recent test results if you have them.

If you do not speak Korean, ask whether an interpreter is available. Our guide to medical interpreters in Korea explains your options.

Ask who will prescribe the herbal medicine. Ask whether that person is a licensed Korean medicine doctor. Ask whether a staff member, coordinator or agency is involved, and what their role is.

Get the herbal medicine ingredient list in writing

Pouch labels are often in Korean only. Ask for a written list before you pay or take the first dose.

• Ask for each herb by its Korean name and its English or Latin name.
• Ask for the amount of each herb, if the clinic can share it.
• Ask for the dose, how often to take it and for how many days.
• Ask whether to take it before or after meals.
• Ask what to do if you miss a dose.
• Ask for a named contact for questions after you leave.

A written list helps any doctor or pharmacist check the herbal medicine later. It also helps if you have a reaction and need care quickly.

Take a photo of the list and of the package label. Keep the paper copy with your other records. Our treatment folder checklist shows what else to keep.

Forms, doses and storage

Korean herbal medicine can come in different forms. Each form has its own practical questions.

• Liquid pouches. These are often boiled at the clinic and sealed. Ask whether they need a fridge and how long they keep.
• Granules or powders. Ask how much water to use and whether to mix them with anything.
• Pills. Ask how many to take and whether you can split them.

Ask how long the course lasts. Ask what should happen at the end of the course. Some people are told to come back for a review, which is hard on a short trip.

If you cannot come back, ask how the clinic will review your progress. Ask whether you should stop at the end of the course or check with a doctor at home first.

Do not change the dose on your own. Do not share your herbal medicine with family members. It was prepared for you.

Check herbal medicine against your medicines

Herbs can change how some medicines work. The US Food and Drug Administration (FDA) says some supplements can change how the body absorbs, breaks down or removes a medicine. You may then get too much or too little of it.

The FDA gives examples. Warfarin, ginkgo, aspirin and vitamin E can each thin the blood. Taking them together may raise the risk of bleeding. The FDA also says St. John’s wort can make some medicines less effective, including birth control pills.

Ginseng is common in Korean herbal medicine. NCCIH notes uncertainty about whether Asian ginseng interacts with some blood pressure medicines, statins and some antidepressants. Studies on ginseng and warfarin have had mixed results. NCCIH also notes that ginseng might lower blood sugar.

• Give the Korean medicine doctor a full list of your medicines and supplements. Include doses.
• Say clearly if you take blood thinners or medicines for diabetes, blood pressure, depression, epilepsy or a transplant.
• Mention birth control pills and hormone treatment.
• Ask a pharmacist or your own doctor to review the combination. Show them the written ingredient list.
• Do not stop a prescribed medicine to start an herbal one. Talk to the doctor who prescribed it first.

Ginseng drinks, teas and supplements are easy to buy in Korea. Count them as herbal products too. Tell the clinic if you already take any of them.

Ask whether to avoid alcohol or any foods during the course. Write the answer on your ingredient list.

If you already take herbal products

Many visitors already take herbal products at home, such as Chinese herbs or Ayurvedic products. Say so before you get a new prescription in Korea.

• Bring a photo of the package or ingredient label of each product.
• Ask whether the new prescription repeats any of the same herbs.
• Ask whether to pause the other product. Do not pause a prescribed medicine before you talk to the doctor who prescribed it.
• Mention teas, jellies or drinks with herbs that you bought during the trip.

A clinic cannot judge safety well if it does not know what you take. If you are not sure, say so and check before you start. Waiting a day to check is usually the safer choice.

Pregnancy, surgery and recent procedures

Many visitors combine herbal medicine with another treatment on the same trip. Tell each clinic about the other.

• Tell the Korean medicine doctor if you are pregnant, may be pregnant or are breastfeeding.
• Tell your surgeon and anesthesia team about every herbal product. Ask them when to stop it before surgery or sedation.
• Tell the clinic about recent cosmetic, dental or other procedures. Ask whether you should wait.
• Mention liver or kidney disease, allergies and past reactions to herbs.

NCCIH says some experts advise against ginseng for women who are pregnant or breastfeeding. Ask the prescriber how this applies to your herbal medicine.

Our guide to anesthesia and sedation questions lists what to share before a procedure.

Children, older adults and long-term conditions

Some groups need extra care. Ask the prescriber how the dose was chosen.

• Children. Tell the clinic the child’s age and weight. NCCIH notes that some experts advise against ginseng for infants and children.
• Older adults. Older adults often take several medicines. Bring the full list and ask for an interaction check.
• Long-term conditions. Tell the clinic about diabetes, heart disease, autoimmune disease, liver disease or kidney disease.

If you care for someone else, keep their medicine list and the herbal medicine list together.

Ask about quality and preparation

NCCIH reports that some Chinese herbal products have been contaminated with heavy metals, pesticides or microorganisms. It also reports cases where one herb was replaced with another by mistake. MedlinePlus notes that herbal medicines do not have to go through the testing that drugs do.

• Ask where the herbs come from and who prepares the medicine.
• Ask for a sealed, labeled package with the clinic name and date.
• Do not buy unlabeled herbal products from street stalls or online sellers you cannot identify.
• Keep the package until you finish the course.

“Natural” does not mean safe for everyone. MedlinePlus says some herbs can cause serious harm and some can interact with medicines.

Interpreters and clear communication about herbal medicine

Terms used in Korean medicine can sound unfamiliar, even in your own language. Meaning can shift when an interpreter is involved. These steps reduce misunderstandings.

• Ask one short question at a time. Do not combine several questions.
• Ask the clinic to repeat or write down important answers.
• Repeat what you heard in your own words and ask whether it is correct.
• If you use a translation app, check medicine names and numbers on the screen.
• Keep asking until you understand. That is a normal request.

Know whether the interpreter works for the clinic or for an agency. Ask the Korean medicine doctor directly about the prescription. Treat the doctor’s explanation as the reference for why and how to take it.

After the consultation, sum up three points: what the prescription is for, how to take it, and which symptoms mean you should stop. If any point is unclear, ask again before you pay.

How a companion can help during a herbal medicine course

If family or a friend travels with you, share some tasks. It is hard to remember everything alone.

• Ask them to take notes during the consultation.
• Ask them to keep the ingredient list, prescription and receipts together.
• Set dose reminders on both phones.
• A companion may notice changes before you do. Ask them to tell you about any worrying change.
• Save your hotel address and the 119 number on their phone for emergencies.

If you travel alone, keep the same details in a note on your phone. It can also help to give the hotel the name of an emergency contact.

Cost, estimates and refunds

Prices vary between clinics. We do not list prices. Ask for a written estimate before you agree to a course.

• Ask what the price includes: consultation, preparation, packaging and delivery.
• Ask how many days of herbal medicine the price covers.
• Ask about the refund policy if you stop early or have a reaction.
• Ask whether delivery to your hotel or to another country is offered, and who is responsible if a package is held at customs.

Check your own travel or health insurance directly. Coverage for herbal medicine differs between insurers. Our guide to itemized quotes explains how to compare estimates.

Red flags in a herbal medicine sales pitch

Most clinics explain herbal medicine calmly. Some sales pitches use pressure instead. Slow down if you hear any of these.

• A promise that the herbal medicine will cure a condition or has no side effects.
• Pressure to buy a long or expensive course on the same day.
• A refusal to give you the ingredients in writing.
• Advice to stop a prescribed medicine without talking to your own doctor.
• A discount that only applies if you decide right now.
• A product sold by a hotel contact, tour guide or shop rather than the prescribing clinic.

You can always take the written list home and decide later. A careful clinic will accept that. Our guide to medical tourism scams lists other warning signs.

If a problem comes up after treatment, keep your records and receipts. Our guide to treatment problems and disputes explains the next steps.

Know the warning signs

Stop taking the product and get medical help if you have a reaction. Bring the package and the ingredient list.

• In Korea, call 119 for trouble breathing, swelling of the face or throat, or fainting.
• Get prompt medical advice for a new rash, unusual bleeding or bruising, or ongoing vomiting or diarrhea.
• Get medical advice for yellow skin or eyes, dark urine or new pain on the upper right side of the belly.
• Tell the prescribing clinic about any reaction, even a mild one.

Our guide to emergency medical help in Korea explains how to get urgent care.

Keep a simple dose log

A short log helps you and any doctor who sees you later. Use a notebook or your phone.

• Write the date and time of each dose.
• Note any new symptom, even a small one.
• Note any other medicine or supplement you took that day.
• Note sleep, appetite and digestion changes.

Bring the log to any follow-up visit. Share it with your doctor at home.

Before you fly home with herbal medicine

Rules for bringing herbal products into a country vary. A product sold in Korea may still be restricted at home.

• Check your destination country’s customs and medicine import rules before you buy a large supply.
• Carry the written ingredient list and the prescription.
• Keep the products in their original labeled packages.
• Liquid pouches may fall under cabin liquid limits. Check with your airline.
• Plan who will review your symptoms at home if you keep taking it.

Our guide to travelling with prescription medicine covers documents in more detail.

After you return home

Tell your usual doctor and pharmacist that you took Korean herbal medicine. Show them the ingredient list and your dose log.

• Ask whether any of your regular medicines need a check, such as blood tests.
• Ask before you reorder more of the same product.
• Keep the clinic’s contact details in case questions come up later.

Our guide to a follow-up care plan explains how to arrange care after your trip.

7 questions to ask before your first dose

1. What is this Korean herbal medicine for, and what other options do I have?
2. Can I have every ingredient in writing, with English or Latin names?
3. What is the dose, and how long should I take it?
4. Could it interact with the medicines and supplements on my list?
5. Is it safe with my pregnancy, surgery or recent procedure?
6. Which symptoms mean I should stop and get help?
7. Who can I contact with questions after I leave Korea?

Write the answers down. If an answer is unclear, ask again before you start.

Read our editorial policy and medical disclaimer to see how we prepare guides.