"i just began this drug yesterday, and considering that i have been under pain management for well over 10 years with oxycodone and oxycontin? i am having a very difficult time with the side effects of this medication. i will be reporting this to my dr. immediately today, when his office opens. i have been unable to sleep the entire night, and have only had 2 pills 12 hrs apart! i am going to er as i cannot continue feeling this way..."