I found a little white round pill. It has on one size sz under sz 780 and the pill has a coating on it.

I did a quick online search and it looks like it is Methylphenidate, a generic Ritalin substitute.

SZ 780 Pill Identification (http://www.drugs.com/imprints/sz-780-11266.html)

The best idea is to take it to a pharmacy, they will identify it and dispose it properly.