I seem to have more difficulty dealing with the mental aspect of withdrawal than the physical withdrawal.  It seems like I don't get sick as quickly as most of the people of the people i know, and I also seem to avoid suffering from a significant amount of the most common ailments. ( diarrhea, vomiting, ect.) My biggest complaints have always been the anxiety, the mood swings, the inability to sleep for days on end, and the cravings.  