I know what it is!
It's irregular shape, pink pill with some stripes on it. Most likely it is a mysery pill containing mysterous amount of mystery substances, some of which might not be good for health. It's hard to judge based on the picture. but i would guess the pill is about two feet long 8 inch thivk, weigths about 10lbs. I might be mistaken, but this is as reliable as anyone elses take.
For not finding the pill: Have you looked the place where you took the picture at? Perhaps you left the pill there. Such a big pill should be easy to notice.
Hope this helped!