Clicky."In Mexico, medications such as Valium, Vicodin, Placidyl, Ambien, codeine, pseudoefedrine, Demerol, morphine, and Ativan are not legally sold over-the-counter without a valid prescription from a Mexican physician. If the purchaser succeeds in purchasing controlled medicines without a prescription, Mexican police can arrest the purchaser and vendor and charge them with possession/sale of a controlled substance. The sentence for possession of a controlled substance runs from ten months to fifteen years in a Mexican prison. Making such an illegal purchase also puts the buyer at risk for various extortion scams perpetuated by police officials (who sometimes work in league with the very pharmacy that sold the medication). "So now you know you can get into trouble buying over there. Bringing it into the country I would suspect you better have some solid documentation proving you got it legally, and need to take it.