Puerto Nuevo has several pharmacies right in town and you will find the staff professional, helpful, and accommodating.
Visitors must have their prescription for some medications or risk trouble with both US and Mexican law keepers.
Many Americans travel to Mexico on a regular basis to purchase their prescriptions because of the substantial savings. It is doubtful that US Customs will bother you if it is obvious the purchase is not more than a 3 month supply for one person.
A word of warning. Even though Mexico has recently decriminalized possession of small amounts of some drugs, excessive amounts any illegal
drugs, including marijuana, is punishable by seven years in jail. Possession of excessive amounts of controlled substances (Valium,
Hydrocodone, etc.) carries an equal penalty.
It is absolutely illegal to transport steroids across the US border.