You can get Soma there without a prescription. Except for ketamine, almost anything that's scheduled in the U.S. requires a doctor's prescription to buy. But U.S. Customs won't let you in with that surgery-at-home medicine. Mexican policia can put you in prison if they find you with Valium, T-3s, Oxy, etc. and no prescription. Mexico is a dangerous place. A farmacia that sells you stuff without a scrip can turn around and snitch on you. Pay for the scrip unless you really like to live dangerously. That is, if you're a gringo tourist and an easy target for la mordida ("the bite").

If your penpal uses the mail, anything that looks valuable is often stolen. FedEx and UPS are more reliable, but Customs opens almost everything they bring in from Mexico.

Trampy