Travelling to Latin America with ADHD Medication: Adderall Status, Border Documents

Adderall is not registered in Mexico, and no Latin American country accepts a foreign prescription as a customs clearance document. Here's what actually works.

ADHD medication in Latin America: what your prescription cannot do

Adderall (amphetamine salts) is not available in Mexico (the most visited destination in Latin America) and has never been registered on the country's national pharmacopoeia. That is not a customs technicality. It means no Mexican pharmacy can legally dispense it, and any product sold locally as Adderall should be treated as potentially counterfeit.^[1]

This article covers the one rule that catches most travellers off guard: a prescription from your home country is not a border-crossing document for a controlled stimulant in Mexico, Colombia, Argentina, or Brazil. It explains what documentation actually works at customs, which medications are available locally, and what to do if your supply runs short.

Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. Regulations change; verify current rules with your destination country's embassy or drug regulator before you travel. Always consult your prescribing clinician before making any changes to your medication plan.

The document most travellers bring, and why it is not enough

Most travellers pack a printed copy of their pharmacy prescription and assume that is enough to get stimulant medication through customs. It is not. Mexico requires presentation of a valid prescription at the point of entry, and the quantity must be proportionate to the length of your trip. The prescription must also be translated into Spanish, and it must include the prescribing doctor's professional registration number.^[2]

What customs officers actually want to see is a physician letter, a signed document on headed paper that names the diagnosis, the medication by its international nonproprietary name (INN) and brand name, the exact dose, and the medical necessity.

The CDC Yellow Book advises travellers to obtain this letter from their physician before departure. Without it, a pharmacy receipt or digital prescription from a telehealth app carries no weight at a Latin American border.^[3]

Country by country: what you can actually bring

Mexico

Mexico classifies methylphenidate and lisdexamfetamine as Grupo II psychotropics under Article 245 of the Ley General de Salud, supervised by COFEPRIS (Comisión Federal para la Protección contra Riesgos Sanitarios). Postal import of controlled substances requires a COFEPRIS permit; carry all medication in person in your hand luggage. The quantity you carry must correspond to your trip length; quantities over 90 days may be confiscated.^[4]

Amphetamine (Adderall) is not registered for sale in Mexico, so you cannot buy a local equivalent. Ritalin and Concerta (both methylphenidate) are available at major licensed pharmacy chains with a valid prescription from a federally registered Mexican physician. Foreign prescriptions are not accepted for controlled substances at Mexican pharmacies, you need a Mexican doctor to issue a receta especial con código de barras to fill locally.^[1]

The Vyvanse (lisdexamfetamine) situation in Mexico deserves specific attention. Takeda relaunched the product in February 2026 after a four-year withdrawal, but supply is rebuilding slowly and remains constrained. Counterfeit Vyvanse lots with lot numbers that do not correspond to any authentic Mexican product have been confirmed in circulation. Do not rely on local Vyvanse availability.

See our full ADHD medication in Mexico guide for more information on which medication you can bring across the border, and which documents are needed.

Colombia

Colombia regulates stimulant ADHD medications as controlled substances under INVIMA (Instituto Nacional de Vigilancia de Medicamentos y Alimentos) oversight. The INCB advises travellers to check country-specific regulations before carrying controlled medicines across international borders. ^[5]

Methylphenidate (Ritalin, Concerta) is available in Colombia by prescription. If you are visiting Medellín, Bogotá, or Cartagena for an extended stay, establishing care with a local psychiatrist (psiquiatra) before your supply runs out is the safest route.^[5]

Argentina

Argentina's drug regulator ANMAT (Administración Nacional de Medicamentos, Alimentos y Tecnología Médica) oversees stimulant imports. Methylphenidate is available by prescription in Argentina, and Ritalin is stocked at larger pharmacy chains in Buenos Aires. A physician letter in Spanish, combined with original packaging, is required to declare stimulants at Argentine customs. Our travel guide for ADHD in Argentina covers medication import documentation in further detail.

Brazil

Brazil controls stimulant medications under ANVISA (Agência Nacional de Vigilância Sanitária). Methylphenidate is classified as a controlled substance under Brazilian law and dispensed on a special blue-form prescription (notificação de receita B). Travellers carrying methylphenidate into Brazil must carry original packaging, a physician letter, and declare at customs.

The counterfeit trap in tourist pharmacies

When a traveller discovers their medication is unavailable locally, the instinct is to find an alternative quickly. In tourist areas in Mexico and Colombia, street vendors and unlicensed pharmacies will sell pills labelled as Adderall or Vyvanse. Investigations have found pills sold as Adderall in some tourist pharmacies actually contained methamphetamine or other substances. The counterfeit risk is not theoretical, it is documented and ongoing.^[6]

The only safe source of stimulant medication in Latin America is a licensed pharmacy dispensing against a locally issued prescription from a registered physician. If a pharmacy does not ask for a prescription, do not buy from it.

What the five-document pack looks like

A travel medicine specialist can provide the traveller with a letter listing each medication, including generic name, dosing specifics, and indication. Build your document pack well before departure.^[3]

Physician letter in English and Spanish. State the diagnosis, the INN name, brand name, dose, duration of treatment, and medical necessity. Have your doctor sign and date it on headed paper.

Original pharmacy packaging. Keep each blister pack or bottle in its original box with the dispensing label bearing your name, the drug name, and the prescribing physician's details. Do not decant pills into a pill organiser for travel.

Copy of your prescription (original language). This supplements the physician letter and shows a licensed clinician issued the medication.

Your International Patient Summary (IPS). Your IPS on Nomedic compiles your diagnosis, current medications with INN names, and allergy status into a single document readable by any clinician worldwide, including offline. A QR code allows local physicians and emergency staff to scan and verify your record without needing a verbal explanation.

Travel insurance schedule confirming pre-existing conditions are covered. Save your insurer's 24-hour emergency line in your phone before you fly. An incomplete declaration can void coverage for any claim related to your ADHD medication or comorbidities.

If your supply runs out mid-trip

Running short on a controlled substance abroad requires a local physician's prescription, your home prescription cannot be filled at a local pharmacy for stimulants in Mexico, Colombia, Argentina, or Brazil. The process takes time, and you should start it before you run out, not after.

In Mexico, private psychiatric consultations at clinics in Mexico City, Guadalajara, and Cancún range from MX$800 to MX$2,500 (~$40 to ~$124 / ~€36 to ~€113) for an initial appointment. The psychiatrist must issue a receta especial con código de barras for controlled stimulants, and that prescription is only valid for 30 days and can only be filled once.

In Buenos Aires, private psychiatrist consultations typically cost ARS$15,000 to ARS$40,000 (~$15 to ~$40 / ~€14 to ~€36) at current rates, depending on the clinic. Fees shift with Argentine exchange-rate fluctuations, so confirm the current rate before your appointment.

Non-stimulant alternatives such as atomoxetine (Strattera) do not fall under the same controlled-substance dispensing rules in Mexico or Argentina, and a local physician may be able to issue a standard prescription for a bridging supply. Discuss this option with your prescribing clinician before you travel, so you understand the pharmacological implications of any switch in advance.

Carry-on rules: keep everything in your hand luggage

Checked luggage can be delayed, lost, or opened by customs officers without you present. The TSA permits medication in carry-on bags and recommends keeping it in original containers. Keep your entire supply and all supporting documents in your carry-on, not in your checked bag.^[7]

If you are transiting through a third country en route to your final destination, check that country's import rules as well. A layover in a country that bans your specific stimulant can create a problem even if you never exit the transit zone.

The global stimulant shortage adds another layer of risk

A global stimulant medication shortage has been disrupting ADHD treatment since 2022 and has continued through 2025. Supply chains for most stimulant medications rely on a small number of global API manufacturers. Local shortages in Latin American markets are an extension of this global constraint, not an isolated regional issue.^[8]

Bring your full anticipated supply from home. Do not plan to top up locally. In Mexico, Concerta supply at major pharmacy chains has been more stable than Vyvanse, but availability varies by city and month. Calling ahead to confirm stock before you travel is not excessive caution, it is standard practice.

Prepare your records before you leave

Understanding medication import rules before departure is the single most important step in this process. The INCB publishes country-specific traveller regulations for medications containing controlled substances at incb.org, check both your departure and destination countries, and any transit countries on your route.

Creating your International Patient Summary on Nomedic before you travel consolidates your diagnosis, current medications (with INN names that any Latin American clinician can read), and allergy information into a single shareable document. In an emergency setting in Bogotá, Buenos Aires, or São Paulo, handing a local physician your IPS removes the language barrier around your medication history immediately.

Frequently asked questions

Can I bring Adderall to Mexico?

Adderall (amphetamine salts) is not registered for sale in Mexico and is classified as Grupo II (Fracción II, a controlled psychotropic) under the Ley General de Salud. You may carry a personal supply with a valid physician letter in Spanish, original packaging, and a copy of your prescription, but no Mexican pharmacy can legally sell you a local replacement. Any product sold locally as Adderall should be treated as potentially counterfeit.

Does Mexico accept foreign prescriptions for Ritalin or Concerta?

No. Mexican pharmacies do not accept foreign prescriptions for controlled stimulants. To fill methylphenidate (Ritalin, Concerta) in Mexico, you need a receta especial con código de barras issued by a federally registered Mexican physician. That prescription is valid for 30 days and can only be filled once.

How much does a psychiatrist consultation cost in Mexico as a visitor?

Private psychiatric consultations in Mexico City, Guadalajara, and Cancún typically range from MX$800 to MX$2,500 (~$40 to ~$124 / ~€36 to ~€113) for an initial appointment. Some international hospitals such as ABC Medical Center in Mexico City have English-speaking psychiatrists. Confirm availability before your trip.

Can I bring methylphenidate into Brazil as a tourist?

Yes, with the correct documentation. Brazil's ANVISA requires travellers carrying methylphenidate to declare at customs, carry original packaging, and hold a signed physician letter. Locally, methylphenidate is dispensed on a special blue-form controlled-substance prescription (notificação de receita B), which can only be issued by a Brazilian physician.

Is Vyvanse available in Colombia for ADHD?

Lisdexamfetamine (Vyvanse) availability in Colombia is limited and subject to INVIMA registration requirements. Methylphenidate-based medications are more reliably stocked at licensed pharmacies. Carry your full supply from home and do not plan to obtain a local refill without first establishing care with a Colombian psychiatrist.

What happens if my ADHD medication is confiscated at a Latin American border?

If you lack supporting documentation, customs officers in Mexico, Colombia, or Argentina can confiscate controlled stimulants without immediate legal penalty to you, but recovering the medication is unlikely. Contact your country's nearest embassy or consulate immediately, and seek a local psychiatrist consultation to restart care. This is why carrying a physician letter translated into Spanish is non-negotiable before departure.