I came across some pills recently, supposedly from Mexico that were supposedly 10mg oxycodone. They are huge, white, rectangular/oblong with NO markings. I took two, because I have a high opiate tolerance and was not afraid of coming across anything I couldn't handle. The only thing that happened was I got extremely sleepy. Like I had taken two Tylenol pms (but not sleepy like I had taken Ambien or a sleeping medication). It wore off in two hours. Nothing else happened. Certainly not a high. The problem with that is I have an extremely high opiate tolerance and two, 10 mg oxycodne probably wouldn't do to much to me anyway, although I thought I would feel enough to at least know that's what it was. Anyway, can anyone help? They are large, white, thick, about 1/2 in long, and unmarked. Thanks!