Vitamins at Customs in Zihua

We have not had any issues at Customs. We put the Vitamins and prescriptions in clear zip lock bags so they are very visible. We have them in checked bags, except for 1 or 2 of each should we have flight issues of which we carry them. Vitamins do not have to be declared but should you be selected to have your bag examined, the clear bag will show that you are not trying to hide anything. Also, mark on the bag, Vitaminas. They like it when you identify anything in Spanish.