i also have a history of anxiety/panic attacks. i am able to keep attacks at bay when i am sober
with exercise and maintaining as much of a routine as i can in my relatively low-stress life. obviously though, when i was drinking i was sometimes too hungover or unmotivated for these preventative measures.
i do find that when i have a full on attack they are out of nowhere. but general anxiety levels were always highest after a heavy night of drinking.
talk to your dr... he or she may recommend new eating/exercise habits, breathing or relaxation techniques, etc to compliment your medication. and i am sure everyone is different but i was told that the drinking (though not the only cause) was ABSOLUTELY not helping and that as i get more comfortable and stable in my sober life, my anxiety may subside. good luck!