I've been on 60-80mg for 3 days, taken roughly every 6 hours and starting to get some bad effects. I need it for pain but the shivering, anxiety, stomach pains and nausea when I go without it are getting worse. I don't want to get dependence on the stuff.
Codeine is synthesized to morphine. It sucks though. But you're not anywhere near a big dose so the side effects you're having is just a bad reaction to codeine, period.
"When you go without it"? But you're taking it every 6 hours . . . when do you 'go without it'? You mean like a few hours before your next redose? That's just the side effects of codeine, not addiction. You're also taking a very normal amount. Just don't ever raise it, and when you don't need it anymore, stop. I bet some of those symptoms are from all the APAP in the pill as well, like the stomach pain.