looking for identification of the pill described below. found in guest restroom of my home. 2 children ages 10 and 12. this is not a pill the wife or i use or any prescription found in home. extremely concerned of what this pill maybe.

the main body of pill was grey solid capsule style. it had white and blue plastic caps on each end one had letter "L" other end had number "6".
there is a gap between the 2 plastic ends that the main body grey is exposed