Most medications are allowed into Vietnam for personal use — but controlled substances and large quantities require documentation. Vietnamese customs applies a reasonable-quantity rule for personal medications: enough for your trip is generally waved through. Controlled substances (opioids, benzodiazepines, ADHD medications) require more care and documentation.

General Rules: Medications for Personal Use

Vietnam’s customs authority (Tổng cục Hải quan) allows travelers to bring medications for personal use without special permits, subject to these conditions:

  • Quantity — and this is where the rule splits in two: For ordinary medication, enough for your trip is fine. For controlled medication the limit is written into law and it is much tighter than most travellers expect: 7 days’ supply for narcotic drugs, 10 days’ supply for psychotropic drugs and drug precursors. See the section below before you pack.
  • Original packaging: Keep medications in their original pharmacy packaging with the label attached. This establishes what the medication is and what dose.
  • Prescription letter: Not strictly required for non-controlled medications, but having one is strongly recommended. A letter from your doctor on official letterhead stating your name, the medication, dose, and diagnosis is the best documentation.
  • Declaration: Standard over-the-counter medications (antihistamines, paracetamol, ibuprofen, vitamins) do not need to be declared at customs. Prescription medications — especially controlled substances — should be declared.

Controlled Substances: Extra Care Required

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Practical Tips for Traveling with Medications

  • Get a doctor’s letter: For any prescription medication, ask your doctor for a signed letter on official letterhead in English. Include: patient name, medication name (generic and brand), dosage, condition being treated, and duration of treatment.
  • Keep medications in hand luggage: Never check controlled medications in hold luggage. Carry them in your hand baggage in original packaging.
  • Liquid medications: Subject to the 100ml per container, 1-litre bag liquid rule on flights. Liquid medicines (insulin, liquid antibiotics) are exempt from the 100ml rule if you inform security and carry a prescription.
  • CBD and cannabis products: Completely prohibited in Vietnam regardless of legality in your home country. Do not bring CBD oil, cannabis-derived products, or similar items — even if prescription-grade in your country.
  • Online verification: Vietnam’s Ministry of Health publishes a list of controlled substances (narcotics). For specific medications not covered here, check with the Vietnamese Embassy in your country or consult a travel medicine doctor before departure.
In practice: The vast majority of travelers with standard prescription medications (blood pressure, diabetes, allergies, mental health, thyroid, etc.) pass through Vietnamese customs without any issues. Keep medications clearly labeled in original packaging, carry a prescription letter, and you’ll be fine.
Also travelling with these? Vapes are banned outright since Jan 2025 — confiscated at the border. Power banks must stay in carry-on. And if you are carrying over $5,000, you have to declare it.

Frequently Asked Questions

Yes — common antidepressants (SSRIs like sertraline, fluoxetine, escitalopram; SNRIs like venlafaxine, duloxetine) are not controlled substances in Vietnam and can be brought in for personal use. Keep them in original packaging with pharmacy labels. A doctor’s letter is recommended but not strictly required for these medications. Bring no more than your trip duration requires.

Tramadol falls in the narcotic class, which means the limit without an import licence is 7 days’ supply at your prescribed dose. Carry a valid prescription from your doctor showing your name, the drug, strength, quantity and dosage, and declare it at customs (Red Channel). If your trip is longer than a week, arrange it in advance — declare to customs at your port of entry with evidence of medical necessity, or ask a Vietnamese hospital about supply here.

Yes — insulin and syringes are permitted for diabetic travelers. Carry a letter from your doctor confirming your diabetes diagnosis and need for insulin. Declare syringes at customs if you’re carrying multiple. Vietnam has good availability of insulin in major cities (pharmacies in Hanoi, HCMC, Da Nang) but brands and formulations may differ from your home country — bring your full supply.

Alprazolam sits in the benzodiazepine family, which falls under the psychotropic category. That makes it legal to carry for your own treatment, but capped at 10 days’ supply without an import licence, and it must be declared at customs with a prescription. The common mistake is packing a month’s worth for a month-long trip — that is roughly three times the limit. For a longer stay, declare in advance with evidence from your doctor, or arrange supply through a hospital in Vietnam.

Same answer as Xanax — diazepam is a benzodiazepine, so the psychotropic rules apply: maximum 10 days’ supply, declared at customs, with a prescription that names you, the drug, the strength, the quantity and the dose. Whether a specific product counts as psychotropic is set by Ministry of Health lists rather than by how it is scheduled at home, so check the drug name with the Vietnamese embassy in your country if you are unsure.

For ordinary medication, enough for your trip. For controlled medication the law sets a hard ceiling: 7 days for narcotic drugs, 10 days for psychotropic drugs and precursors, at the dose your prescription states — and never more than the prescription itself covers. Both categories must be declared at customs.