People travel all the time and pack their bags with their essentials and also their medications. According to the mx.usembassy.gov, it clearly states that Sudafed, Actifed, and even Vicks Inhalers can get you up to 3 years in a Mexican prison.
Now, this very well not result in jail time as they are not considering you a trafficker of narcotics. Yet it can cause slight detention, and if you have an attitude with them, it may be worse. The thing to do is not bring it with you. The same goes when coming back from your trip and re-entering the USA. They will also ask you do you have any prescription drugs with you. If you are a person with scripts that are considered a controlled substance, keep them in their original bottles. This way there is no issue to show proof. You are buying a controlled drug in Mexico in getting caught. You may find your self in worse trouble than what we will explain below about Sudafed.
It seems like Mexico is taking the war on drugs seriously
The reason is the common ingredient in those products in medicines that contain pseudoephedrine. The website states, “It is illegal to bring into Mexico some over-the-counter medicines commonly used in the United States, including inhalers and some allergy and sinus medications. Specifically, products that contain stimulants (medicines that contain pseudoephedrine, such as Actifed, Sudafed, and Vicks inhalers) or codeine are prohibited”. Only recently, women from Utah on her route to a vacation in Puerto Vallarta, which included a trip to a Mexican jail after over-the-counter Sudafed pills that customs found in her luggage when they arrived at the Puerto Vallarta airport.
The reason for this is that the drug pseudoephedrine is one of the main ingredients that are used to make Meth. So beware, and share this and tell your friends, so that when they are traveling abroad, they check what they can or can’t bring into a foreign country. On the reverse side, tourists entering the United States can also be jailed for carrying substances that are controlled here in the US and face jail time as well.
Before traveling, check both the USA/Canada Website and the country you plan on visiting. Better be safe than sorry. People have been fined for bringing an Apple across when asked are you bringing fruits or vegetables. It may sound trivial, yet border officials have you at there mercy.
Check with a site like this for answers on these subjects to make sure https://mx.usembassy.gov/information-regarding-bringing-medications-into-mexico/