Foreigners Using Drugs in Vietnam: The New 2025-2026 Offense

A joint at a weekend party, treated as trivial in many countries, can now expose a foreigner in Vietnam to a prison sentence, a criminal record, and the risk of deportation. From 1 July 2025, and especially from 1 July 2026, the way Vietnamese law handles the illegal use of narcotics has changed fundamentally, and foreigners are the group most likely to be caught off guard.

Can using drugs once at a bar land you in prison? If you test positive, what happens to your visa and your right to reside in Vietnam? And where is the line that turns conduct seemingly punishable by "just a fine" into a criminal offense carrying a starting sentence of two years' imprisonment? These are the questions that many foreigners, together with their families abroad, struggle to answer once an incident has already occurred. This article analyzes the new offense under Article 256a of the Criminal Code, the boundary between administrative penalties and criminal prosecution, how cases are handled in practice, and the risks foreigners need to understand before it is too late.

The new offense under Article 256a: the line between administrative penalties and criminal prosecution

Before 1 July 2025, the mere act of using narcotics was not treated as a standalone crime in the Criminal Code; it was handled mainly through administrative measures and drug rehabilitation. Law No. 86/2025/QH15, amending the Criminal Code, added Article 256a, effective from 1 July 2025, bringing the act of use back into the category of criminal offenses for the first time, but only in tightly limited circumstances.

The key point to understand correctly is that Article 256a does not criminalize every act of drug use. The prison penalty applies only when the user is in a status already defined under the law on drug prevention and control, such as undergoing rehabilitation, undergoing substitute-medication treatment, or being within the period of post-rehabilitation management. In other words, this offense targets continued use by someone already brought into the treatment and management system, not the imprisonment of everyone who tries drugs for the first time.

So how is a foreigner who uses drugs for the first time, having never been in any of the statuses above, dealt with? That case falls under the administrative-penalty track.

Here is what this means for you: if you are caught for the first time, do not fall within the statuses under Article 256a, and the quantity of drugs is not enough to constitute another offense, the usual consequence is a warning or a fine together with confiscation of the material evidence, not yet a prison sentence. But "not yet a prison sentence" does not mean "no consequences." For a foreigner, a drug-related violation directly affects your visa, your right of residence, and your ability to return to Vietnam, and it triggers a series of procedures that the next section will analyze.

The new legal framework effective from 1 July 2026 and the path from an administrative violation to a prison sentence

What makes 2026 a particularly important milestone is that the 2025 Law on Drug Prevention and Control (No. 120/2025/QH15) takes effect on 1 July 2026, replacing the 2021 Law on Drug Prevention and Control. This is precisely the machinery that defines the management statuses referred to in Article 256a, so any change to it directly affects criminal risk.

The mechanism works as follows. When a person is found or suspected to be using, the competent authority conducts a test for narcotics in the body. If the person does not comply, the competent authority may escort them to the testing location. A positive result is sent immediately to the commune-level police chief of the person's place of residence, and from there the user is placed under management.

In parallel with management, the authorities determine whether the person is addicted. If a person is found to be addicted and placed into rehabilitation, then from that moment, continued use is no longer an administrative violation but falls squarely within the cases under Article 256a, with a starting sentence of two years in prison. This is the gateway few people notice: the first positive test is usually not a prison matter, but it places you into a process in which each subsequent instance of use carries far heavier legal weight.

The 2025 Law also tightens management: it applies electronic monitoring to certain groups, assigns commune-level police to issue decisions and conduct monitoring directly, and links data across the system. For a foreigner, this means that a single positive test does not simply "pass" and disappear, but is recorded and tracked. The path from an initial administrative violation to criminal risk, if use continues, has become shorter and clearer than before.

How a case is handled in practice when a foreigner is found using drugs

In practice, a drug-use case involving a foreigner typically goes through the following steps:

1. Detection and testing: being checked at a bar, nightclub, place of lodging, or through an administrative inspection, then being required to undergo a test for narcotics in the body.
2. Classification of handling: if the conduct is only use and does not constitute a crime, the offender is subject to an administrative penalty under Article 30 of Decree 282/2025/NĐ-CP, and is at the same time placed under management and assessed for addiction.
3. If there are signs of a crime: for example, possessing drugs on one's person, enticing or facilitating others to use together, or being in a status falling under Article 256a, the investigating authority may institute criminal proceedings and apply custody or temporary detention.
4. Investigation, prosecution, and trial: this is the stage where statements and the case file shape the charge; the court's judgment will determine the offense and the penalty.
5. Deportation: for a convicted foreigner, the court may impose the penalty of deportation.

It is worth noting that residence consequences do not arise only from a judgment. Even where a case stops at administrative handling, the immigration authority may still consider cancelling the visa, terminating residence, and compelling the exit of a foreigner who has violated Vietnamese law. For a foreigner, therefore, the line between "being administratively fined" and "losing the right to remain in Vietnam" is far thinner than is commonly assumed.

Legal risks and the mistakes foreigners commonly make

The most dangerous mistake is thinking that "if I only use and don't sell, the worst is a fine." In reality, for a foreigner, the greatest risk usually lies not in the use offense under Article 256a, but in the more serious offenses they may inadvertently commit from the very first time, regardless of whether they have ever been placed under management.

The first is the offense of illegal possession. Merely having a quantity of drugs on your person, in your room, or in your vehicle may constitute the offense of illegal possession of narcotics, and the threshold is very low. From just 0.1 grams of heroin, cocaine, methamphetamine, or MDMA, a person in possession may be sentenced to between 03 and 05 years' imprisonment under Article 249 of the Criminal Code. Even an ecstasy pill you are holding for a friend may be regarded as possession.

The second is the offense of organizing drug use. Inviting friends to use together, dividing up portions, or preparing a location and instruments for a group to use together may be classified as the offense of organizing the illegal use of narcotics.

Conduct that many people see as "sharing the fun" among friends may be viewed very differently through a criminal lens, with a far higher penalty bracket than self-use.

Finally, a common misconception must be clarified: being invited to a working session or being held in custody does not mean you are already guilty. Under the principle of the presumption of innocence, a person is considered guilty only when there is a legally effective conviction by a court. The period between detection and an official conclusion is the most important time to protect your rights, not the time to give up.

The role of DEDICA when a foreigner is involved in a drug case

DEDICA Law Firm accompanies foreigners and their families at every stage of a case. Before a working session with the police or before testing, we advise clearly on your rights and on how to deal with the authorities lawfully. During the investigation, our lawyers register as defense counsel and take part to ensure the client is not subjected to coerced or prompted statements and is guaranteed the right to an interpreter. In assessing the file, we focus on correctly identifying the charge, requesting the application of the correct penalty bracket, and objecting to reclassification into a more serious offense such as possession or organizing use where there is no sufficient basis, while also handling the consequences for visa, residence, and deportation.

For cases where the family is abroad and has lost contact with a relative held in custody, DEDICA becomes the channel of information and the legal representative in Vietnam, helping the family understand the situation and jointly build a timely defense strategy.

If you are a foreigner living, working, or traveling in Vietnam, or have a relative caught up in a drug-related case, do not wait until trial to seek a lawyer. DEDICA Law Firm advises you on your rights, takes part in your defense from the earliest stage, and handles the residence and deportation consequences as well. Contact DEDICA for a lawyer to assess your specific situation.

This article is for reference based on the legal provisions in force at the time of writing. Each case depends on its specific file, evidence, and procedural stage; please consult a DEDICA lawyer for accurate advice on your own situation.