Etizolam & its efficacy
Etizolam (Pasaden) has been found to retain its effectiveness a lot longer than other, more commonly prescribed anxiolytics. Just because you're not 'feeling' it does NOT mean it isn't continuing to treat your condition. It isn't the sort of drug one would take just for the feeling, and (as an example) similarly, I have been using OxyContin now since about 14 years ago; I stopped 'feeling' it, ie feeling the opiate 'buzz' sought by recreational users, after only a week or two into my treatment. However there IS a problem but it's because my pain level has increased so much rather than with the drug itself - I need more to treat what is a progressive condition and have a fool of a doctor who refuses to keep pace with my pain, forcing me to seek additional pain relief elsewhere; a position no patient should ever be put into.
But certainly studies (I read one paper from the University of Milan which examined over 200 patients' experiences) have shown that etizolam retains anxiolytic effect at the same dosage far better than alprazolam or diazepam.
As for withdrawal symptoms, as a triazolothienodiazepine one would expect that the stupidly high dosage you have been using will produce desperately bad WDs, and I suggest you work out some sort of taper with your doctor, even using part-substitution with a longer half life diazepine anxiolytic such as diazepam, medazepam or prazepam. Diazepam might be too heavily sedating though that is the one suggested by the definitive Ashton Manual (see at benzo.org.uk).
I don't know your location but I know of only three countries in Europe where etizolam is commonly seen or prescribed. As for the USA or Canada I simply haven't a clue.
Bayer PASADEN is by a long way the most-dispensed brand. And it certainly is not a cheap anxiolytic, being around three times the price of 1mg alprazolam (Xanax brand). Only made in 0.5mg and 1mg strengths.