opiate withdrawal
"I've been on opiate pain killers for 6 mos following a shoulder surgery--which is still painful and may require additional surgeries to correct.  I got tired of taking Oxycontin 3x per day, or get chills, etc. Tried clonidine and it is as close to a miracle as you can get when withdrawing from opiates.  No chills, not fever, no vomiting, I just take Imodium 2 tablets for the GI stuff--and it is a walk in the park over trying to taper then go off completely (which I did when I had my other shoulder done).  I took 100mcg-150mcg 3x a day. Don't take for more than two weeks to be safe, and not become dependent on the clonidine, which has it's own withdrawal issues."