Depends on your country and, more specifically, your doctor. Some may see it viable to prescribe a long-acting maintenance benzo, such as clonazepam, with a quick-acting acute response aid such as alprazolam. Two benzos at a time is an idea many doctors will immediately dismiss, but it is possible and I've had such prescriptions (though never two anxiolytics - one anxiolytic and one hypnotic; eg. clonazepam/temazepam).
When I've sought help for a similar problem, my particular doctors have changed my prescription to lorazepam - it is fast-acting and is often found to be a slightly more effective anxiolytic. I was prescribed 0,5mg-1mg daily for anxiety management, and an additional 0,5mg for acute onset of panic.