It is possible to have serious adverse reactions with OxyContin
If you are allergic to it! I'm allergic to "coedine" and anything that is a derivative or otherwise related triggers the same response. The anthestiologist (sp?) who did my saddle block when I had my daughter learned this the hard way -- he had to hand me my albuterol inhaler just as I was about to start pushing because my oxygen levels had plummeted (along with the baby's heart rate). The albuterol saved me -- they slapped an oxygen mask on me and let me push her out. (This was an unusaul solution -- albuterol is contraindicated in labor 'cause it tends to stop it!) Interestingly, when I got my file later for my allergist, this little interlude with the oxygen and albuterol was not in the progress notes!