my father is 69 years old, nad has been taking 0.25 mg xanax 3 times a day for almost 3 weeks. he is also taking an antidepressant (seroxat). he is always tired, sleepy and dizzy, and i believe it is due to the xanax side effects, i want to take him off of it, or at least take it down to only 0.25 mg at bedtime, but i am worried about withdrawal and return of anxiety. what is the best way to do it?