I always assumed since my bottles were legit, all the docs info, dea # and my name and info that I wouldn't have a problem. I also have traveled to central america, mexico and the caribean with them as carry on, never had them looked at but I didn't think it would be a problem.
Normally I don'y carry meds with me when I drive since I only take them at night (usually) but I know women that have all sorts of bottles in their purse and I figured if its properly labeled then its legal, just like if you had a bottle of viagra or propecia.