And here is a key point: A prescription from a Mexican doctor is no longer acceptable. 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. The FDA prohibits the importation of “unapproved new drugs” for the purpose of distribution and sale. But there are limits. In addition, some prescription medications in the U. 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.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. 35 reviews. 77 helpful votes. 1. Re: Buying Viagra Abroad. 10 years ago. Save. Yup, they carry Viagra at just about every corner pharmacia. Some pharmacias even have the “Super Viagra Man” dude posted at their entrance! Big blue guy wearing a Superman cape, LOL. While there I looked at the prices for Cialis and Viagra. From my calculations one tab of Cialis ran something over $ Almost the same with Viagra. So, yes it is available without any script, but the prices do not match up with Chicago and going the normal way of .