i can't stress enough how important it is for you to do a google search on Professor Heather Ashton Manual (or just type in benzo). it's all about benzodiazepenes. you are on a very short-acting benzo, and you are suffering from interdose-withdrawals. that's why you are having to take more and more. your body is now used to the 4mg. dose, and it is going into withdrawal between doses. this nightmare can get worse beyond your wildest dreams, and i speak from experience. 4mg. per day of xanax is equal to 80mg. of valium! you need to switch over to a longer-acting benzo(preferably valium) so that you can taper down. it is almost impossible to wean off of xanax, especially after 6 years. it doesn't stay in the body long enough for you to be able to taper smoothly. valium has a much longer half-life, so it stays in the body longer. this enables you to taper off of the valium and not suffer such bad withdrawals. i am currently on valium from oxazepam(another very short-acting benzo). please take this seriously. benzos(xanax, klonopin, oxazepam, etc.) are the worst drugs to come off of. to give you hope, i am doing much better on the valium. now that i have stabalized on the valium(meaning manageable withdrawal symptoms), i will begin my taper tomorrow(monday). this is very doable. i went cold turkey from 200+ mg. oxaz(100mg. valium equivalent) for 5-6 days but i had to reinstate due to seizures and severe hallunications(you will not get these symtoms with a slow taper from valium, i promise). i didn't even know it was a benzo. i went through pure hell! i wouldn't wish that experience on my worst enemy. you will be okay, but you have to do the research on benzos. also, make an appt. with your dr. right away, so that you can start your switch asap. most drs. know it is very hard to come off of xanax, and they will put you on a longer-acting benzo to taper from, but it is very important for you to have the knowledge about benzos(once again, Heather Ashton) so that you know how to approach your dr. about it. i only speak from experience here, you definitely need your drs. help. please post back with any questions you have about the ashton manual. i will help you all i can.