Melatonin in Vietnam: Import Rules and Availability

Quick reference

Drug class: Hormone / sleep aid
Controlled substance: No
Prescription required: Not confirmed, bring a doctor's letter regardless
Available locally: Not reliably available; no confirmed registered brands in Vietnam pharmacies
Storage: Room temperature, below 25°C, away from light and moisture
Max supply to carry: No confirmed import cap; carry a full trip supply plus a buffer
Key document: Doctor's letter naming the medication by INN, dose, and quantity
Emergency alternative: If you run out, visit a private hospital in Hanoi or Ho Chi Minh City and request a consultation with a physician who can source or substitute melatonin.

Melatonin in Vietnam: what travellers need to know

Melatonin, sold internationally as Circadin and Slenyto (UK, Ireland, Germany, Spain, Italy) and as Melatobel in Japan, is not a controlled substance in Vietnam and is not scheduled under Vietnam's drug control framework. However, no confirmed registered brand is stocked consistently in Vietnamese pharmacies, so bringing your full supply from home is essential.^[1]

This guide covers what to pack, how to handle customs, how to find care if something goes wrong, and what Vietnam's tropical climate means for storage.

Medical disclaimer: This guide is for informational purposes only and does not constitute medical advice. Always consult your prescribing doctor before travelling with medication, particularly regarding supply quantities, storage requirements, and import documentation.

Before you travel

Documentation for travelling to Vietnam with melatonin

Vietnam's Ministry of Health regulates personal medication imports under Circular 23/2023/TT-BYT, which requires travellers to carry a doctor's letter or prescription confirming personal use for any medication brought into the country. No separate import permit is required for melatonin, as it is not a controlled or prescription-only substance under Vietnamese law. A clear doctor's letter in English is sufficient for customs purposes.^[2]

Pre-travel paperwork timeline

T-30 days
Book a prescriber or GP appointment to obtain a doctor's letter confirming your melatonin use, the dose, and the quantity you are carrying.Doctor's letter
T-14 days
Confirm the letter includes your full name, the INN (melatonin), brand name if applicable, dose, frequency, and quantity. No import permit is required for Vietnam.Reviewed doctor's letter
No permit processing required; use this window to verify the letter is complete.
T-7 days
Have the letter translated into Vietnamese if your trip is longer than two weeks or you are travelling to rural areas without English-speaking medical staff.Translated letter
T-1 day
Print both the English and Vietnamese versions of the letter. Pack melatonin in its original packaging with the pharmacy label visible.
T-0 (border)
Melatonin is not a controlled substance in Vietnam, so proactive declaration is not mandatory. Keep documents accessible in case customs officers ask about any medication in your luggage.

Carry every doc to the border

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What your doctor's letter must include

Full name, medication name (melatonin as INN and brand name if prescribed, e.g. Circadin), dose and frequency, quantity carried, condition name, doctor's signature and registration number, clinic letterhead. A Vietnamese translation is not legally required at the border but is strongly advised for any medical encounter inside the country.

No notarisation or apostille is required for a personal medication letter entering Vietnam. A standard clinic-letterhead document with a doctor's signature is sufficient.

How much melatonin to bring

Vietnam imposes no confirmed quantity cap on non-controlled medications for personal use, but customs officers have discretion to question large quantities. Bringing up to 150% of your planned trip supply is a practical buffer. There is no reliable local supply of melatonin to fall back on, so running short has real consequences. Most travel insurance policies do not reimburse the cost of replacing non-prescription supplements abroad.

Split your supply

Carry your main supply in hand luggage and a backup portion in checked baggage. If one bag is lost or delayed, you retain access to medication. Keep both portions in original packaging with pharmacy labels intact.

Packing and storing melatonin for travel

Standard melatonin tablets and capsules should be stored below 25°C, away from moisture and direct light. Vietnam's average temperature exceeds 30°C in the south year-round, so keep medication in an insulated pouch during transit and in air-conditioned accommodation. Do not store tablets in a checked bag on the tarmac during a tropical layover, heat inside unpressurised cargo holds can spike well above 40°C.^[3]

At the airport and border

Airport security with melatonin

Melatonin tablets are a solid medication and are not subject to the 100 ml liquid restriction enforced by airport security agencies. Keep your melatonin in your carry-on in its original packaging. Security staff at major hubs including Noi Bai International Airport (Hanoi) and Tan Son Nhat International Airport (Ho Chi Minh City) may ask to see documentation for any medication. Having your doctor's letter readily accessible avoids delays.

Customs and medication import rules for Vietnam

Vietnam Customs requires travellers to declare medications in quantities exceeding a reasonable personal supply. Melatonin is not a narcotic or psychotropic under Vietnamese law, so no import permit is required and there is no mandatory declaration for a personal quantity. If a customs officer asks about the medication, present your doctor's letter and original packaging.^[2]

Keep original packaging at all times

Transferring melatonin into an unmarked pill organiser can raise questions at customs. The original box with the pharmacy dispensing label confirms the medication, your name, and the prescribed quantity at a glance. This is particularly useful if you are transiting through a third country en route to Vietnam.

While in country

Melatonin availability in Vietnam

Brands of melatonin sold in Vietnam

Brand name	Indication	Formulation	Supply note
Generic melatonin (no confirmed registered brand)	Sleep disorder / jet lag	Tablet (various dosages)	Sporadic availability at international pharmacies in Hanoi and Ho Chi Minh City; not reliably stocked

No melatonin brand is confirmed as registered by Vietnam's Drug Administration of Vietnam (DAV) for general retail sale. Some international-facing pharmacies in Ho Chi Minh City and Hanoi may stock imported dietary-supplement-grade melatonin, but supply is inconsistent and cannot be relied upon. Where available, unbranded melatonin 3 mg tablets typically cost ₫150,000 to ₫350,000 (~$6 to ~$14 / ~€5.50 to ~€13) per packet. A local prescription is not required to purchase dietary supplement forms, but quality and dosage accuracy are not guaranteed.^[4]

Finding a doctor who can prescribe melatonin in Vietnam

Private hospitals in Hanoi and Ho Chi Minh City, including Vinmec International Hospital and FV Hospital, employ English-speaking physicians who can assess your situation and issue a local prescription or recommendation letter.

A private outpatient consultation costs approximately ₫400,000 to ₫1,200,000 (~$16 to ~$48 / ~€14.50 to ~€44). Telemedicine platforms such as Doctor Anywhere operate in Vietnam and can provide a teleconsultation without an in-person visit.

Search for providers near your destination

Use Nomedic's provider search to find doctors and pharmacies in Vietnam.

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Storing melatonin while in Vietnam

Standard-release melatonin tablets require storage below 25°C and away from direct sunlight. In Vietnam's southern provinces, ambient temperatures regularly exceed 33°C from March through November. Store your supply in the hotel room's air-conditioned interior, not by a window or in a bag left in direct sun. Circadin prolonged-release tablets have the same storage requirements as standard melatonin and do not require refrigeration.^[3]

Emergencies

What to do if something goes wrong with your melatonin in Vietnam

If your medication is lost or stolen, file a police report (dial 113) and contact your travel insurer immediately. Report loss of any medication to your insurer before attempting to replace it, as reimbursement typically requires documented evidence of loss.

If you run out, visit an international pharmacy in Hanoi or Ho Chi Minh City first. If they cannot supply melatonin, attend a private hospital outpatient clinic where a physician can assess your situation and identify alternatives. Bring your doctor's letter naming the INN (melatonin), your dose, and your condition so the treating physician has a clear starting point.^[5]

“Tôi cần melatonin. / Tôi bị rối loạn giấc ngủ. / Xin hãy gọi bác sĩ. / Hiệu thuốc gần nhất ở đâu?”

I need melatonin. / I have a sleep disorder. / Please call a doctor. / Where is the nearest pharmacy?

Vietnam's national ambulance number is 115.^[6] For a non-emergency medical situation, call your hotel reception and ask for the nearest private hospital with English-speaking staff.

Your medication details, ready to share

Nomedic stores your medication name, INN, dosage, and frequency in your IPS, readable by any clinician worldwide.

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Frequently asked questions

Is melatonin legal in Vietnam?

Melatonin is legal in Vietnam and is not classified as a controlled or prescription-only substance under Vietnamese pharmaceutical law. You may bring a personal supply for your trip without an import permit, provided you carry a doctor's letter confirming personal use.

Can I bring melatonin into Vietnam?

You can bring melatonin into Vietnam for personal use. No import permit is required. Carry the medication in its original packaging with a doctor's letter naming the INN, dose, quantity, and your name to present at customs if asked.

Do I need a doctor's letter to fly with melatonin to Vietnam?

A doctor's letter is not a legal requirement for melatonin entering Vietnam, but it is strongly advised. Vietnamese customs officers may ask about any medication in your luggage, and a letter naming the INN, dose, and quantity provides clear proof of personal use and avoids unnecessary delays.

Is Circadin available in Vietnam?

Circadin, the prolonged-release melatonin brand sold in the UK, Ireland, Germany, France, Spain, Italy, Sweden, Norway, and Australia, is not confirmed as registered or stocked in Vietnam. If you take Circadin, bring your full trip supply plus a buffer, as a local equivalent is not reliably available.

Is melatonin available in Vietnam pharmacies?

Melatonin is not reliably available in Vietnamese pharmacies. Some international-facing pharmacies in Hanoi and Ho Chi Minh City may stock imported supplement-grade melatonin, but supply is inconsistent. No confirmed registered brand, including Circadin or Slenyto, is listed by Vietnam's Drug Administration of Vietnam for general retail distribution.

What if I run out of melatonin in Vietnam?

If you run out, check international pharmacies in Hanoi or Ho Chi Minh City first, as they occasionally stock imported melatonin. If none is available, a private hospital outpatient consultation with an English-speaking physician is the next step; bring your doctor's letter so the clinician can understand your current regimen.

Does Vietnam's tropical heat affect melatonin tablets?

Standard melatonin tablets degrade if stored above 25°C for extended periods. In Vietnam's southern regions, outdoor temperatures regularly exceed 33°C. Keep your supply in air-conditioned accommodation and in an insulated pouch during any outdoor transit to protect tablet integrity.

Melatonin in Vietnam: Import Rules, Availability and Storage