Which is more effective or best to use for anxiety: xanax (alprazolam) or xanax (alprazolam) er.? cons & pros.

Not sure.: Use the one that works. I do not believe there is any practical difference between the two or between them and the multiplicity of other benzos. There may be some subtleties but they are hard to predict and often an empiric trial or switch is better than all the literature and marketing material.

Depends : What type of anxiety do you have? Gad, social anxiety, seasonal, panic? How old are you? (age says 54 but these don't always match true age). Do you have kidney or liver problems? Do you have other psychological problems? Are you taking other meds? Do you drive a lot or operate equipment? Do you have problems going to sleep or staying asleep? Please address all these with prescribing doc!