If you're flying and bringing them in your carry-on then it may be the TSA who would be giving you a hard time. Having perscriptions with you and making sure the name on the bottle is your name is the best way to avoid any troubles. I've never heard of anyone having any major troubles regarding medication.
02/20/2011 Carnival Victory (San Juan - S Carib)
07/11/2010 Carnival Freedom (W Carib)
02/13/2010 Navigator of the Seas (W Carib)
05/14/2008 Carnival Spirit (Glacier Bay - Alaska)
11/12/2007 Carnival Freedom (US Inaugural - W Carib)
02/01/2007 Celebration (Bahamas)