I've read that dark circles and puffiness under the eyes is related to the kidneys.
I did my first Liver Flush a month or so ago and had no difficulties at all. I decided to do it spur of the moment and followed Dr Clark's recipe (no orthinine though). I used grapefruit juice mixed with the olive oil and had no problems. The following morning the Epsom Salts and grapefruit juice did not taste good, but at no time did I gag or feel like vomiting. Others have posted that they did eat a fatty breakfast and suffered for it.
I really found it to be rather painless...except that I felt pretty darn hungry...which is why I was glad to drink the potions! Can't promise you that it will be that easy for you, but if you are too anxious right now then read more posts and wait until the time is right (I waited about 4 months before trying it, and after having done several bowel cleanses).
I got myself a couple of good movies and magazines in case I had trouble sleeping at 10pm...think I dosed off around midnight. I felt really good a day later...a mild high I would say.