For tourists in Argentina, the drugs that are clearly legal are alcohol, tobacco, caffeine, and prescription medications you bring with proper documentation. Recreational drugs remain illegal to buy or sell, but a 2009 Supreme Court decision means personal possession of small amounts is rarely prosecuted. Medical cannabis is legal only for patients enrolled in Argentina’s national registry, which is not practically available to visitors.
Alcohol, Tobacco, and Caffeine
Alcohol is legal for anyone 18 or older under Law 24.788. Wine culture runs deep, craft beer is widespread, and alcohol is sold in restaurants, bars, and supermarkets with no unusual restrictions on tourists. Serving minors is a punishable offense, so expect ID checks in some venues.
Tobacco is legal for adults, but Law 26.687 is strict about where you can smoke. Smoking is banned in all enclosed workplaces, public buildings, schools, museums, libraries, public transportation, and fuel stations. Open-air patios and terraces are exempt, which is where most smoking happens in practice. Almost all tobacco advertising and brand sponsorship is also prohibited.1Tobacco Control Laws. Argentina Law 26687
Caffeine is entirely legal and culturally central. Mate, the traditional herbal drink brewed from yerba mate, is consumed more widely than coffee, and you’ll see people carrying thermoses and gourds everywhere. There are no restrictions on adult purchase or consumption.
Bringing Prescription Medications Into Argentina
You can bring personal medications into Argentina, but customs officers may ask to see documentation, and the quantity has to be proportional to the length of your stay.2Consulate General and Promotion Center in Los Angeles. Entering Argentina with Your Medications
A few practical rules to follow:
- Keep medications in their original packaging.
- Carry a signed, dated letter from your doctor on professional letterhead listing the generic and brand name, dosage, concentration, quantity, and medical reason.
- For controlled substances such as ADHD stimulants, benzodiazepines, or opioid pain medications, be aware that additional permits from Argentina’s drug and medical technology authority, ANMAT, may apply.3Argentina.gob.ar. ANMAT (EN)
Argentina bans the import of products containing certain pharmaceutical ingredients outright, including nimesulide (an anti-inflammatory sold in some countries) and olaquindox.4International Trade Administration. Argentina – Prohibited and Restricted Imports Check the ingredient list of any medication you plan to bring. Once in-country, basic painkillers and some antibiotics are sold without a prescription at pharmacies; stronger medications require a prescription from a licensed Argentine physician.
Personal Drug Possession and the Arriola Ruling
This is the part tourists most often misunderstand. Argentina’s main narcotics law, Law 23.737, has criminalized all drug possession since 1989, including for personal use. Article 14 of that law sets a penalty of one month to two years in prison for possessing a small amount when circumstances indicate personal consumption.5Organization of American States. Narcotic Drugs Law No. 23.737
In 2009, Argentina’s Supreme Court changed how that provision works in practice. In the case known as Arriola, the court unanimously held that it is unconstitutional to punish someone for possessing drugs for personal consumption when that possession does not affect anyone else. The reasoning drew on Article 19 of the Argentine Constitution, which protects private actions that do not harm third parties or public order.6Constitute Project. Constitution of Argentina 1994
What this means in practice for a visitor:
- Personal possession of a small amount, in private, is decriminalized but not legalized.
- Buying and selling drugs remains a serious crime, regardless of quantity.
- The court did not set a specific gram threshold. Courts decide “small amount” case by case.
- The original case involved marijuana, but the constitutional reasoning applies to private possession of any substance.
The gap between the ruling and daily policing is where tourists get caught. Studies of Law 23.737 enforcement have found that roughly 90 percent of drug law cases begin with police stopping people in public who are carrying small amounts, usually marijuana or cocaine, and who are not committing any other offense. Many lower courts dismiss these cases under Arriola, but the stop, the detention, and the paperwork still happen. If you are carrying any illegal substance, assume a police encounter is possible even if a conviction is not.
Medical Cannabis Is for Registered Patients Only
Argentina legalized medical cannabis in 2017 under Law 27.350, and a 2020 decree expanded access to include home cultivation and subsidized products for registered patients. Access runs through REPROCANN, the national cannabis patient registry administered by the Ministry of Health. Enrollment requires a medical indication from a licensed Argentine physician and a signed informed consent form, with identity verified through Argentina’s “Mi Argentina” digital platform.7Argentina.gob.ar. Registro REPROCANN8Ministerio de Salud de la Nación. Instructivo de Registro del Programa de Cannabis (REPROCANN)
Registered patients can grow their own cannabis, designate a cultivator, obtain product through authorized nonprofits or licensed pharmacies, and transport their medicine within Argentina, including on domestic flights, as long as they carry their REPROCANN documentation. The program is structured around Argentine residents under the care of Argentine doctors. There is no tourist pathway, and medical cannabis prescriptions from your home country do not grant you legal status to possess or import cannabis in Argentina. Recreational cannabis has not been legalized.
What Will Get a Tourist in Serious Trouble
The Arriola ruling protects private, personal possession. It does not protect anything that looks like distribution, and Argentine law comes down hard on trafficking. Under Law 23.737, producing, manufacturing, trading, transporting, storing, or distributing drugs for profit carries four to fifteen years in prison. Giving drugs away without charge is three to twelve years. Financing or organizing a trafficking operation is eight to twenty years. Making a location available for drug production, trafficking, or group use is three to twelve years.5Organization of American States. Narcotic Drugs Law No. 23.737
For a visitor, the practical risks sit at the edges of personal use: buying from a dealer, carrying a quantity large enough that a prosecutor argues it is for distribution, using drugs where minors are present, or sharing with others in a way that a court treats as supply. Cocaine, heroin, synthetic drugs, and all other controlled substances are illegal to manufacture, import, or distribute, full stop. Importing drugs across the border, including bringing cannabis from a country where it is legal, is trafficking under Argentine law.
The short version for a tourist: drink the wine, smoke outside, bring your medications with proper paperwork, and understand that anything beyond that sits in a legal gray zone where the law on paper and the police on the street do not always agree.