How much medication can I bring back from Mexico?

A rule of thumb: Bring no more than a 90-day supply of medication. If you're staying longer than 90 days, you may have additional medication sent to you by mail or courier. Include documentation showing that the medication is being sent for your own use while visiting the United States.



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At the point of entry into Mexico, you must report to the customs authorities and present the medical prescription issued by the competent authority. Said document must bear the name of the doctor who authorizes the prescription, his/her signature, contact details (telephone, address) and professional registration.

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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.

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If you enter or leave Mexico, you must declare any sum of money equaling US$10,000 or more that you bring in cash, checks, money orders, other cashable documents or a combination of them. Failing to declare carries a fine ranging from 20% to 40% of the exceeding amount.

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At the Airport Security Checkpoint
You can tell the screening officer about your prescription drugs or present a written list. You may wish to bring doctor's notes, original prescription bottles or containers, and other documentation to make the screening process go more quickly.

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Can you take unmarked pills on a plane? You can take unmarked pills with you on a plane in carry-on and checked baggage. Your medication does not have to be in its original packaging.

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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.

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What Kind of Drug Test Does TSA Use?
  • Marijuana (THC metabolite)
  • Cocaine (Benzoylecgonine metabolite)
  • Opiates (Morphine, Codeine, and 6-Monacteyl Morphine metabolites)
  • Amphetamines (Dextroamphetamine and Levamphetamine)
  • Phencyclidine (PCP, angel dust)


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