Pharmacies in Mexico: Prescriptions, Antibiotics and the Rules
Mexican pharmacies sell many medicines over the counter, but antibiotics and controlled drugs follow strict prescription rules. What the law says and what to do before you fly in with your own pills.
Mexican pharmacies need a doctor’s prescription (receta médica) for antibiotics, for controlled medicines and for many other drugs, under Article 226 of the General Health Law. Since 2010, the health regulator COFEPRIS has required pharmacies to sell antibiotics only against a prescription, which they stamp with the quantity and date each time they fill it.
Which medicines need a prescription in Mexico?
Article 226 of the General Health Law (Ley General de Salud) sorts medicines into six groups, known in pharmacies by their numbers (fracciones). The group printed on the box tells the pharmacist what to ask for.
| Group | Rule for buying | Typical examples |
|---|---|---|
| I | Special prescription or permit from the Health Ministry | Narcotics such as strong opioid painkillers |
| II | Prescription retained by the pharmacy and logged; valid 30 days, up to two packages | Many psychotropic drugs |
| III | Prescription that can be filled up to three times, stamped and logged each time, retained on the third | Other controlled psychotropics |
| IV | Prescription, refillable as many times as the doctor indicates | Antibiotics, influenza antivirals and many other prescription medicines |
| V | No prescription, but sold only in pharmacies | Products whose label says they are sold only in pharmacies |
| VI | No prescription; can be sold outside pharmacies | Basic over-the-counter products |
The law bans selling medicines from street stalls, mobile stands and street vendors. Since a 2022 reform, prescriptions must name the generic drug (denominación genérica); a doctor may add a preferred brand.
How do antibiotic prescriptions work?
A 2010 agreement on the sale of antibiotics ended over-the-counter sales: the pharmacy must see a prescription before selling any antibiotic. COFEPRIS’s good-practice guide for pharmacies says staff stamp the prescription and write the quantity sold and the date each time they fill it. The prescription has to carry the doctor’s name, signature, professional license number (cédula profesional) and contact details.
Keep the paper prescription with your medicine. A foreign prescription is not a Mexican prescription; pharmacists may refuse it, and for antibiotics and controlled drugs they should. A local doctor can write a new one after seeing you.
What are the doctor’s offices next to pharmacies?
Many pharmacy chains run a small consulting room next to the store (consultorio adyacente a farmacia), where a general practitioner sees walk-in patients. COFEPRIS regulates these offices: the doctor must meet the official standard for outpatient clinics, NOM-005-SSA3-2010, and the pharmacy must follow the Mexican Pharmacopoeia rules for drug sales. A consultation there produces a valid Mexican prescription for routine problems such as a throat or urinary infection.
For anything beyond a minor illness, a family doctor, an IMSS clinic or a private hospital is the better route. Our guides to IMSS voluntary enrollment and private health insurance explain the options.
Can you bring your own medicine into Mexico?
Yes, in reasonable amounts and with paperwork. The U.S. Embassy’s page on bringing items into Mexico sets out the conditions Mexican customs apply to medicine carried for personal use:
- A prescription or a doctor’s letter stating the amount you need during your stay, the amount you are carrying and the daily dose.
- The prescription must show the doctor’s name, signature, contact details and professional registration, and be translated into Spanish.
- Carry no more than you need for your stay, in your hand luggage, in the original boxes and in transparent bags.
- Declare the medicine to customs on arrival.
Some common US over-the-counter products are illegal to bring in. The embassy names products containing pseudoephedrine or codeine, including some inhalers and sinus remedies. Drugs on Mexico’s controlled-substance lists need a COFEPRIS permit. The embassy’s page dates from 2021, so check the latest rules with your airline and the nearest Mexican consulate before flying.
How do you import medicine for personal use by mail?
Medicine shipped to you from abroad needs a COFEPRIS personal-use import permit (permiso sanitario de importación para uso personal), and customs, not COFEPRIS, holds packages without one. COFEPRIS’s page on importing medicine for personal use says, as of November 2026:
- The quantity must match the prescription.
- Permits for medicines that are not narcotics or psychotropics are free and take up to 10 business days.
- Permits for narcotics or psychotropics carry a fee and take up to 14 business days.
- Permits last 180 calendar days; for non-controlled medicines they can be extended once for the same period.
- You apply online through the foreign-trade single window (VUCEM), which requires an e.firma or RFC, or in person at COFEPRIS’s service center at Oklahoma 14, colonia Nápoles, Benito Juárez.
If you do not yet have an RFC or e.firma, our guide to getting an RFC in Mexico explains the SAT process.
Can you take medicine bought in Mexico back to the US?
US rules apply at the border, not Mexican ones. US Customs and Border Protection and the Food and Drug Administration limit what travelers can bring in, especially controlled substances, and they can seize medicine that does not meet those rules. Check both agencies’ current guidance before buying medicine in Mexico to take home, and keep the Mexican prescription and receipt.
This page explains Mexican pharmacy rules in general terms and is not medical advice. A licensed doctor should decide what you take and in what dose.
Bottom line
Bring a Spanish-translated prescription and the original boxes for anything you fly in with, and check whether any of your medicines are controlled in Mexico before you travel. Once here, register with a local doctor so you can get Mexican prescriptions for refills.
FAQ
Can I buy antibiotics without a prescription in Mexico?
No. Antibiotics are sold only with a prescription, and the pharmacy stamps it with the date and quantity each time. A pharmacy-adjacent doctor’s office can examine you and write one if a doctor decides you need it.
Is a US prescription valid in a Mexican pharmacy?
Not formally. Mexican rules require a prescription from a doctor with a Mexican professional license number. For antibiotics and controlled drugs, plan on seeing a doctor in Mexico who can write a local prescription.
Are pharmacies open 24 hours in Mexico City?
Some branches of the big chains open around the clock, especially near hospitals and on main avenues. Check the chain’s store locator for the nearest 24-hour branch and save it in your phone.
Who regulates pharmacies in Mexico?
The Federal Commission for the Protection against Sanitary Risks (COFEPRIS) sets and enforces the rules for medicines and pharmacies. It can fine or close pharmacies that sell prescription drugs illegally.