If its in a pill bottle with foreign & official Dr/ Hospital medical writing on it - they typically totally ignore a small bottle or 2 of most anything at customs. They ain't gonna screw w/ your health over a few pills. Last thing they want is you passing out or puking in line there. Ideally they want you gone as fast as possible.
Good point. I got through customs really quick by claiming a bunch of narcotic medications. Relax, they were all scripts.