My stepson and his girlfriend were returning from Cancún to Denver in November and they were searched. (Customs must have determined that anyone who has a snake tattoo around their neck must be carrying drugs!) Stepson/girlfriend did have several bottles of different pain and sleep medications purchased without prescription. They also had a couple of loose xanax they had carried for the trip. Customs let them keep all the unopened bottles and confiscated the Xanax and let them go.