Xanax is a very potent benzo and can make you feel tired and drowsy, but unlike Valium it is not a muscle relaxant as well. You may feel relaxed with Xanax but not like the body-stoned effect of valium. Valium stays in your blood longer so you can see why is very addictive, a mind and body relaxant. I find Xanax good because it is short-acting and potent, but doesn't make me want to chill out on the couch.