Disposable Diapers: First Response

Best Way to Dispose of Extra Antibiotics

I gave the kids as much pink medicine as they were supposed to have, but I still have some left over. Does anyone know the best way to get rid of it? Flush it, trash it, rinse it down the sink? My concerns are mostly environmental, wouldn't want my extra amoxicillan to find it's way into our drinking water or poison any fish.