I have been suffering from anxiety and panic attacks for more then 13yrs of my 30yrs of my life. I have been on every anti anxiety and anti depressant medication on the market besides "mao" medication. Nothing works and if it does it's only for a short period of time.
I have anxiety attacks everyday and 3 to 4 times a year i call the ambulance and get rushed to the nearest emergency room for my panic attacks. I am currently on 40 mgs of lexapro, xanax xr 1mgs and xanax short acting 2mgs a day. I am running out of meds to take and, most importantly, hope of a cure or some relief.
Most people with panic attacks are able to find a successful treatment that reduces or eliminates their symptoms. Given the intensity of your symptoms despite standard treatments, I'd recommend you get a consultation with a doctor specializing in panic disorder or anxiety disorders.
You've mentioned MAO inhibitors, which is one group of medications that can be helpful for some people with panic disorder who have not responded to medication. There are other classes of medication and also cognitive-behavioral therapy and other specific anti-panic therapies that can be very helpful.