I have been taking ultram/vicodin for the past 6 years. I started on vicodin (up to 6 10/325 a day but only about 4 a day average, then after 3 years switched to ultram rather the generic version which I took no more than 4 a day (average 3) for 4 years. I quit cold turkey 5 days ago and withdraw symptoms (cold sweats, uncontrollable temperature variations (too cold/too hot, can't regulate) were actually extremely mild, but the jitters, they are persistent.