The Legality of Bringing Prescription Drugs Into the U.S. From Mexico (2024)

Mexican pharmacies offer prescription medications at lower prices than pharmacies in the United States. The price difference is so great that some Americans travel to Mexico to take advantage of the savings. In addition, some prescription medications in the U.S. are sold over the counter in Mexico.

As more and more Americans struggle to cover the cost of prescription medications, a trip to Mexico is an attractive solution, especially for those who live along the southern border.

This article discusses how to use a Mexican pharmacy. It also explains the legality of buying medications in Mexico and the rules regarding crossing the border with pharmaceuticals. Please note that the rules often change without notice, so it's important to stay informed.

The Legality of Bringing Prescription Drugs Into the U.S. From Mexico (1)

Are Prescriptions From Mexican Pharmacies Legal?

You can bring prescription medications approved by the Food and Drug Administration (FDA) from Mexico into the United States. But there are limits.

The U.S. Customs and Border Protection (CBP) will generally prohibit a supply for more than 90 days to come across the border. However, if you have medications that are considered a controlled substanceincluding some cough medicines, tranquilizers, sleeping pills, antidepressants, or stimulants, you may only bring up to 50 dosage units across the border without a prescription. Beyond that amount, you will need a prescription from a licensed U.S. physician or dentist who is registered with the Drug Enforcement Administration (DEA).

And here is a key point: A prescription from a Mexican doctor is no longer acceptable.

In addition, you must state, in writing, that the medication is for your personal use. Essentially, you are agreeing that you are not going to be selling the drugs or giving them to someone else.

All medications must be declared upon arrival at the border. And they must be in their original containers. Medications that are not approved by the FDA may not be allowed. Note that it is illegal to fail to declare imported medications with CBP agents properly.

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When Is It Legal to Import Drugs?

The FDA prohibits the importation of "unapproved new drugs" for the purpose of distribution and sale.

This category includes any drugs failing to meet FDA safety and effectiveness standards. This also includes foreign-made versions of U.S.-approved drugs. These are the drugs that are often cheaper than those in the U.S.

The rules may be relaxed under certain conditions, including:

  1. It is an over-the-counter (OTC) product that is not for a serious condition, and there is no known significant health risk; or
  2. It is a prescription product for a serious condition. and an effective treatment may not be available in the U.S.

This does not mean that the FDA will allow individuals to import medications from Mexico at will. It does, however, give law-abiding Americans some options if they can't get or can't afford medications in the U.S..

Stay Up to Date on Requirements

The CBP website provides an updated list of prohibited and restricted items. The FDA also has a guide for the importation of drugs originally intended for foreign markets.Be aware that the rules the CBP agents follow change often and without notice, so it's important to contact the CBP (1-877-227-5511) for timely information. If you're flying, contact the Transportation Security Administration (TSA) to ask about requirements.

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Risk of Importing Prescription Medication

Imported drugs from a Mexican pharmacy can carry some serious risks. The FDA is only responsible for drugs marketed and sold in the U.S., so there is no guarantee or monitoring of drug purity, safety, or quality.

This is especially true with drugs that are available only by prescription in the United States but sold over the counter in Mexico.

Safety risks of importing medications can include:

  • Contamination or presence of harmful substances
  • Counterfeit versions that do not contain what is claimed
  • Expired medications that are less effective
  • Inconsistent potency
  • Use of ingredients that are untested or banned in the U.S.
  • Potential for unsupervised use of the medication
  • Labeling and language issues
  • Lack of information related to side effects

Required Documentation

Always check with the CBP for updated requirements. Customs officials will generally want a letter from the individual (patient) stating that the drug from a Mexican pharmacy is intended for personal use to treat a serious medical condition.

You will also need to provide the name and address of the U.S.-licensed doctor who is responsible for your treatment with the product; or proof that you are continuing treatment started in another country.

The medication should be in its original container with a doctor's instructions printed on the bottle, in English, and generally containing no more than a three month supply.

Summary

There are limits to bringing prescriptions purchased at a Mexican pharmacy into the United States. You may do so if you have a serious medical condition, there are no effective treatments available in the U.S., and the drug does not pose any unreasonable risks.

Even then, there are restrictions. For example, you will be limited to a three-month supply.

8 Sources

Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.

  1. U.S. Food & Drug Administration. Personal importation.

  2. U.S. Food & Drug Administration. CFR—code of federal regulations Title 21.

  3. U.S. Customs and Border Protection. Traveling with medication.

  4. U.S. Customs and Border Protection. Prohibited and restricted items.

  5. U.S. Food & Drug Administration. Importation of drugs originally intended for foreign markets.

  6. U.S. Food & Drug Administration. Imported drugs raise safety concerns.

  7. U.S. Embassy and Consulates in Mexico. Health alert: Counterfeit pharmaceuticals (March 17,2023).

  8. U.S. Food & Drug Administration. 5 tips for traveling to the U.S. with medications.

By Marian Anne Eure
Marian Eure, RN, is a registered nurse with more than 25 years of experience in adult health care, health promotion, and health education.

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The Legality of Bringing Prescription Drugs Into the U.S. From Mexico (2024)

FAQs

The Legality of Bringing Prescription Drugs Into the U.S. From Mexico? ›

In most circ*mstances, it is illegal for individuals to import drugs or devices into the U.S. for personal use because these products purchased from other countries often have not been approved by the FDA for use and sale in the U.S. If a drug is approved for use in another country but is an unapproved new drug in the ...

Do you have to declare prescription drugs at customs? ›

If you're prescribed medication abroad, review U.S. Customs & Border Patrol's list of restricted and prohibited items to certify that medication obtained abroad may be brought back into the country. Declare all medication and associated items at customs. Carry medication obtained abroad in its original container.

What meds can you buy in Mexico over the counter? ›

You can buy most drugs and medications in Mexico Over the Counter (OTC), without a prescription, as long as they are not included in the list of “Controlled Medications, group I and group II”. In addition, you will need a prescription to buy antibiotics.

Do prescription drugs have to be in original containers for international travel? ›

Keep medicines in their original, labeled containers. Ensure that they are clearly labeled with your full name, health care provider's name, generic and brand name, and exact dosage. Bring copies of all written prescriptions, including the generic names for medicines.

What are the TSA requirements for medication? ›

It is recommended that medication be clearly labeled to facilitate the screening process. You may bring medically necessary liquids, medications and creams in excess of 3.4 ounces or 100 milliliters in your carry-on bag. Remove them from your carry-on bag to be screened separately from the rest of your belongings.

How does customs check for drugs? ›

Customs inspectors use giant X-ray machines to search for contraband inside a truck. Customs agencies also use drug-sniffing and bomb-sniffing dogs to stop smugglers. These animals go through an intense training process that teaches them to recognize and locate particular odors in exchange for some play time.

Can you bring Viagra back from Mexico? ›

Quality, Safety, Legality of Prescription Drugs Bought in Mexico. Some people may be concerned about the quality of prescription drugs they can buy in Mexico. In general, it's perfectly safe and legal to purchase prescription drugs in Mexican pharmacies and bring them back into the United States for personal use.

Can you legally bring prescription drugs from Mexico? ›

U.S. Citizens Traveling with Medication

You should travel only with your own medication that was prescribed to you by a licensed physician and/or legally obtained in the United States. In fact, in most cases, it's illegal for a U.S. citizen to obtain drugs from outside the United States and import for personal use.

Is it legal to buy prescription drugs from another country? ›

In most circ*mstances, it is illegal for individuals to import FDA-approved drugs from other countries for personal use. However, based on changes enacted by the MMA, personal importation of prescription drugs that have not been approved by the FDA for use in the U.S. is permitted on a case-by-case basis.

Is Mexican Amoxicillin the same as American Amoxicillin? ›

The content uniformity for the amoxicillin capsules was found to be 15.4 +/- 2.4% and 99.4 +/- 9.3%, for Mexican and U.S. capsules, respectively. The percent relative standard deviation (% RSD) for weight variation was found to be 8.7% and 1.5% for capsules obtained from Mexico and the United States, respectively.

What medications can I not bring back from Mexico? ›

However, you can't buy nor bring back stronger antibiotics such as Cipro. These are part of pharmacy meds under the controlled substance list. Even if you have a prescription from a US or Mexico doctor, the border agents won't let you cross back those meds across the border.

Is traveling with prescription drugs illegal? ›

You can bring your medication in pill or solid form in unlimited amounts as long as it is screened. You can travel with your medication in both carry-on and checked baggage. It's highly recommended you place these items in your carry-on in the event that you need immediate access.

What happens if drugs are found in checked luggage? ›

You should not attempt to travel with illegal drugs or drug paraphernalia of any kind to avoid airport arrest. If illegal drugs are discovered on your person, in your carry-on luggage, or concealed in your checked baggage, you will immediately be arrested.

Can I mix pills in the same container? ›

DON'T ... Combine different medications in one bottle. While consolidating your meds may save space, it also can lead to mistakenly taking the wrong pill or confusion over what's what. Some medications may even react with others negatively when kept in the same container.

Can you bring pills in a Ziploc bag on a plane? ›

You can take prescription medications on a plane. They can be placed in a clear plastic bag for screening or in your checked-in luggage. But you may have to undergo additional security checks and you should be prepared for these.

Will customs seize prescription drugs? ›

While these drugs or devices may be legal somewhere else, if the FDA has not approved them for use in the United States, they may not legally enter the country and will be confiscated, even if they are prescribed by a foreign physician.

Does customs look at medication? ›

Medication is usually screened by X-ray; however, if a passenger does not want a medication X-rayed, he or she may ask for a visual inspection instead. This request must be made before any items are sent through the X-ray tunnel.

What needs to be declared at US customs? ›

Also, anything you bring back that you did not have when you left the United States must be "declared." For example, you would declare alterations made in a foreign country to a suit you already owned, and any gifts you acquired outside the United States.

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