Benzos such as xananx, clonopin and ativan are only meant for short term use. They are highly addictive and only work for a short period before having to be upped in dose until you are finally on the highest dose and are addicted and have to be weaned off of them. They cause more damage than they do good. My advice run away from the benzos and get on a routine medication instead of a PRN (as Needed) These are only supposed to be used every now and then not on a regular basis.
Look into something like lexapro, paxil something along those lines. Benzos can be very effective for an immediate fix but dont work for long term regular maintenance.