I don't mean to scare you, OP, but this is basically just exactly how a friend of ours overdosed and nearly died. He drank a 40 oz and then took a couple bumps and uh... yep, his eyes rolled back, he fell out of his chair, and it was sweet dreams for him until we got the paramedics there to hit him with the narcan. It took them a long time to get there, too, and so I was pretty sure that he was a goner... had they arrived just a few minutes later, yeah, he would probably be dead.
I would be very careful if I were you, very careful; mixing substances, especially substances like alcohol and dope (or oxycodone/hydrocodone) tend to depress the respiratory system and everything else to a dangerous, often times fatal degree.