Prescription meds, Can't answer that even after 20 trips as I've never once been stopped going through Customs. They only seem to stop residents or individuals with GIANT BOXES wrapped in brown paper. Its like a giveaway that they are bringing more than the alloted amount of duty free items into the country and get the full on body cavity search to tax them properly.
If you are Gringo, have your normal suitcases your breeze through customs should take all of 12 seconds.
_________________
The Boss of All Bosses!!! Hey I'm a drunk alcoholics go to meetings!