The nurse practitioner i go to see for Worker's Compensation gave...

The nurse practitioner i go to see for Worker's Compensation gave me this medicine to see if it will work on my bulging disks, severe compression, arthritis, and degenerative disk disease, to reduce any inflammation I have. I took 3 pills at once at lunch on the day I started and I couldn't get rid of the taste for hours! Then later I noticed a flushed feeling, which is supposed to be normal. I then started to get really annoyed with my 3 year old son. I stopped taking the meds that night and started taking them in the morning. I again felt flushed and easily angered by either my wife or my son. My problem is this: Either take this medication as prescribed, go through the bad side effects or take my chances with the steroid shots and hope I don't develop worse back problems? Any advice would be greatly appreciated.