Many times and places I have stated that in Mexico the purchase of ED medication requires a Rx from a Mexican physican. Perhaps the following will convince "the doubters."
Part of the reason that mongers disagree on what the Mexican Rx law says is that most monger don’t speak much Spanish and/or they listen to gossip instead of seeking authoritative sources for their information. The following sources are clear about what the law says.
Here is the actual law
http://www.salud.gob.mx/unidades/cdi/nom/072ssa13.html published on Internet by the Mexican government. It says in part:
NORMA Oficial Mexicana NOM-072-SSA1-1993, Etiquetado de medicamentos.
5.11.1 En la etiqueta de los medicamentos, se deberل expresar la clave de registro sanitario, tal como se indica en el oficio de registro, seguida del nْmero romano de la fracciَn que corresponda a los medicamentos, ambos con la misma tipografيa y tamaٌo, y de acuerdo a la siguiente clasificaciَn:
I. Medicamentos que sَlo pueden adquirirse con receta o permiso especial, expedido por la Secretarيa de Salud;
II. Medicamentos que requieren para su adquisiciَn receta médica que deberل retenerse en la farmacia que la surta y ser registrada en los libros de control que al efecto se lleven;
III. Medicamentos que sَlo puedan adquirirse con receta médica que se podrل surtir hasta tres veces;
IV. Medicamentos que para adquirirse requieren receta médica, pero que pueden resurtirse tantas veces como lo indique el médico que lo prescriba;
V. Medicamentos sin receta, autorizados para su venta exclusivamente en farmacias, y
VI. Medicamentos que para adquirirse no requieren receta médica y que puedan expenderse en otros establecimientos que no sean farmacias.
The above divides medication into categories. The purchase of category IV drugs require the customer to have a Rx from a Mexican physician. The customer retains possession of the Rx and the Rx is valid for the number of refills indicated by the prescribing physician. ED medications are category IV medications. (The registration number for Cialis, for example, is 181M2002 SSA IV. The last two digits indicate the medication category.)
The following information is provided by the U.S. Department of State at
http://travel.state.gov/travel/cis_pa_tw/cis/cis_970.html
DRUG PENALTIES AND PRESCRIPTION MEDICATIONS:
Penalties for drug offenses are strict, and convicted offenders can expect large fines and jail sentences up to 25 years. The purchase of controlled medication requires a prescription from a licensed Mexican physician; some Mexican doctors have been arrested for writing prescriptions without due cause. In those instances, American citizens who bought the medications have been held in jail for months waiting for the Mexican judicial system to decide their fate. The Mexican list of controlled medication differs from that of the United States, and Mexican public health laws concerning controlled medication are unclear and often enforced selectively. To determine whether a particular medication is controlled in Mexico, and requires a prescription from a Mexican doctor for purchase, please consult the website of the Mexican Federal Commission for Protection Against Health Risks at
http://www.cofepris.gob.mx/pyp/estpsic/es.htm
The U.S. Embassy recommends that U.S. citizens not travel to Mexico for the sole purpose of buying prescription drugs. U.S. citizens have been arrested and their medicines confiscated by the Mexican authorities, even though their prescriptions were written by a licensed American physician and filled by a licensed Mexican pharmacist. There have been cases of Americans buying prescription drugs in border cities only to be arrested soon after or have money extorted by criminals impersonating police officers. Those arrested are often held for the full 48 hours allowed by Mexican law without charges being filed, then released. During this interval, the detainees are often asked for bribes or are solicited by attorneys who demand large fees to secure their release, which will normally occur without any intercession, as there are insufficient grounds to bring criminal charges against the individuals. In addition, U.S. law enforcement officials believe that as much as 25 percent of medications available in Mexico are counterfeit and substandard. Such counterfeit medications may be difficult to distinguish from the real medication and could pose serious health risks to consumers. The importation of prescription drugs into the United States can be illegal in certain circumstances. U.S. law generally permits persons to enter the United States with only an immediate (about one-month's) supply of a prescription medication.