Buy Norco in Mexico
This is a more difficult and sensitive issue. Technically, it is not lawful for individuals to import medications, even for personal use, into the United States. This includes buying medications in Mexico and bringing them back to the United States. However, in many situations, "personal use" importation is overlooked, although it is still illegal. U.S. Customs is not likely to overlook importation of controlled substances such as Norco. You are less likely to have problems if you have a legitimate prescription from a legitimate United States healthcare provider, a copy of the prescription from the Mexican healthcare provider, and documentation of a legitimate medical need for Norco. Also, you likely will be allowed to import only small quantities of Norco, if any. This action is technically illegal, and you do not have a "right" to bring Norco into the United States with you.
It would be irresponsible to offer advice about buying Norco in Mexico without mentioning Norco abuse and addiction. If you are searching the Internet for ways to buy Norco from Mexico, this may be a sign that you have a problem with Norco addiction. Your healthcare provider is a great place to start when searching for help for Norco abuse or addiction. He or she will be able to help you deal with such problems (hopefully in a nonjudgmental way) or may suggest other resources for you.