I took xanax for some days, about 5 weeks ago. is it likely that xanax is completely out of my system now? i don't have any health issues?

The time for this to stay in ones' system varies with certain metabolic factors. The time for 1/2 to be gone is about 12-24 hours with the remaining to be considered gone after 4 of these 1/2 times. By a week out it is considered gone & certainly by 5 weeks out none would be left. Tests done on hair samples might show exposure during the period the hair was growing.