I was on oxycontin for 2.6 years I became addicted and didnt even know it until ine night I ran out of my meds.I experinced sever muscle spazems migraine headaces I didnt sleep for46 hours.While I was taking the medicane I had constipation, depression, no energy after I stopped taken them cold turkey I found out that I could have experencied hullications convosions