My drug of choice is alcohol these days. As far as withdrawal goes, It really depends on how much I've indulged the day/night prior. If moderate, with a bit of effort and some benzos, I can stave off withdrawal for something like 24 hours. Then I start getting nausea, tremors, anxiety. If I went hard the night before, it's as soon as I wake up, I need a shot or two to steady myself, to get to a baseline. If I go beyond 24 hours I have real tremulousness and unbearable panic attacks, high blood pressure, if I go much beyond that, I'd probably be a hospital job. Y'all who have been involved with opiates know what I'm talking about, and I used to be involved with the same shit. The psychological dynamics of it aren't too often except booze is on every street corner.