SMALL WHITE ROUND PILL WITH IMPRINT THAT APPEARS TO BE L358 ON ONE SIDE AND JUST A HALF MARK LINE ON THE OPPOSITE SIDE. i FOUND THIS ON THE FLOOR OF MY SONS BEDROOM AND i ALSO HAVE A SIX YR OLD DAUGHTER SO i AM EAGER TO FIND OUT WHAT THIS PILL IS AND WHAT IT IS USED FOR. ANY HELP YOU CAN GIVE ME WOULD BE GREATLY APPRECIATED. THANK YOU SO MUCH